国产清纯在线精品_老太婆性杂交毛片_日本黄色影院在线观看_一本大道香蕉高清视频1区_欧美肥婆另类杂交_亚洲欧美日韩成人网手机版_免费中文熟妇在线影片密芽_亚洲国产精品成人综合色在线看_18禁黄网站禁片无遮挡观看_了解最新香蕉午夜视频

首頁(yè) 產(chǎn)品展示>珀金斯Perkins2206-E13操作保養(yǎng)維修

珀金斯Perkins2206-E13操作保養(yǎng)維修

珀金斯Perkins2206-E13操作保養(yǎng)維修供應(yīng)商,珀金斯Perkins2206-E13操作保養(yǎng)維修技術(shù)價(jià)格規(guī)格咨詢服務(wù),珀金斯Perkins2206-E13操作保養(yǎng)維修零配件供應(yīng),珀金斯Perkins2206-E13操作保養(yǎng)維修售后服務(wù)中心,珀金斯Perkins2206-E13操作保養(yǎng)維修,珀金斯Perkins2206-E13操作保養(yǎng)維修詳細(xì)的技術(shù)參數(shù),
產(chǎn)品咨詢

詳細(xì)描述

Operation and

Maintenance

Manual

2206-E13 Industrial Engine

TGB (Engine)

TGD (Engine)

TGF (Engine)

Electronic Control Module 9

The ECM controls the engine operating parameters

through the software within the ECM and the inputs

from the various sensors. The software within the

ECM can be changed by installing a new flash file.

The flash file defines the following characteristics

of the engine:Engine power, Torque curves, Engine

speed (rpm), Engine Noise, Smoke, and Emissions.

This document has been printed from SPI². Not for Resale


 

SEBU8337

29

Operation Section

Engine Diagnostics

Engine Diagnostics

i02651197

Engine Operation with Active

Diagnostic Codes

i02784187

Self-Diagnostics

If a diagnostic lamp illuminates during normal engine

operation, the system has identified a situation that is

not within the specification. Use the electronic service

tool to check the active diagnostic codes.

The electronic  control module has  some

self-diagnostic ability. When an electronic problem

with an input or an output is detected, a diagnostic

code is generated. This indicates the specific problem

with the circuitry.

The active diagnostic code should be investigated.

The cause of the problem should be corrected as

soon as possible. If the cause of the active diagnostic

code is repaired  and there is only one  active

diagnostic code, the diagnostic lamp will turn off.

A diagnostic code which represents a problem that

currently exists is called an active code.

A diagnostic code that is stored in memory is called

a logged code. Always service active codes prior to

servicing logged codes. Logged codes may indicate

intermittent problems.

Operation of the engine and  performance of the

engine can be limited  as a result of the  active

diagnostic code that is generated. Acceleration rates

may be significantly slower and power outputs may

be automatically reduced. Refer to Troubleshooting

, “Troubleshooting with a Diagnostic Code” for more

information on the relationship between each active

diagnostic code and the possible effect on engine

performance.

Logged codes may not  indicate that a repair is

needed. The problems may have been repaired since

the logging of the code. Logged codes may be helpful

to troubleshoot intermittent problems.

i02572812

i02784585

Engine Operation  with

Diagnostic Lamp

Intermittent Diagnostic Codes

The “DIAGNOSTIC” lamp is used to  indicate the

existence of an active fault.

If a diagnostic lamp illuminates during normal engine

operation and the diagnostic lamp shuts OFF,  an

intermittent fault may have occurred. If a fault has

occurred, the fault will be logged into the memory of

the Electronic Control Module (ECM).

A fault diagnostic code will remain active until  the

problem is repaired.

i02784192

Fault Logging

In most cases, it is not necessary to stop the engine

because of an intermittent  code. However, the

operator should retrieve the  logged fault codes

and the operator should reference the appropriate

information in order to identify the nature of the fault.

The operator should log any observation that could

have caused the lamp to light.

The system provides the capability of Fault Logging.

When the Electronic  Control Module (ECM)

generates an active diagnostic code, the code will

be logged in the memory of the ECM. The Perkins

electronic service tool can retrieve codes that have

been logged. The codes that have been logged can

be cleared with the Perkins electronic service tool.

The codes that have been logged  in the memory

of the ECM will be automatically cleared from  the

memory after 100 hours.

•  Low power

•  Limits of the engine speed

•  Excessive smoke, etc

This information can be useful to help troubleshoot

the situation. The information can also be used for

future reference. For more information on diagnostic

codes, refer to the Troubleshooting guide  for this

engine.

This document has been printed from SPI². Not for Resale


 

30

SEBU8337

Operation Section

Engine Starting

Engine Starting

i02583442

Starting the Engine

i02773196

Before Starting Engine

Note: Do not adjust the engine speed control during

start-up. The electronic control module (ECM) will

control the engine speed during start-up.

Before the engine is started, perform the  required

daily maintenance  and any other  periodic

maintenance that is due. Refer  to the Operation

and Maintenance Manual, “Maintenance Interval

Schedule” for more information.

New engines

Prime the turbocharger. This can be achieved  by

cranking the engine briefly with no fuel.

•   Open the fuel supply valve (if equipped).

If necessary, stop a new engine  if an overspeed

condition occurs. If necessary, press the Emergency

Stop button.

NOTICE

All valves in the fuel return  line must be open before

and during engine operation to help prevent high fuel

pressure. High fuel pressure may cause filter housing

failure or other damage.

Starting the Engine

1.  Move the ignition switch to the ON position. If a

system fault is indicated, investigate the cause. If

necessary, use the Perkins electronic service tool.

If the engine has not been started for several weeks,

fuel may have drained from  the fuel system. Air

may have entered the filter housing. Also, when fuel

filters have been changed, some air pockets will be

trapped in the engine. In these instances, prime the

fuel system. Refer to the Operation and Maintenance

Manual, “Fuel System - Prime” for more information

on priming the fuel system.

2.  Push the start button or turn the keyswitch to the

START position in order to crank the engine.

3.  If the engine fails to start  within 30 seconds,

release the start button or the ignition switch. Wait

for 30 seconds in order to allow the starting motor

to cool before attempting to start the engine again.

Note: A system fault may  be indicated after the

engine is started. If this occurs the ECM has detected

a problem with the system. If  necessary, use the

Perkins Service Tool to investigate the problem.

Engine exhaust contains products of combustion

which may be harmful to your health. Always start

and operate  the engine  in a well  ventilated area

and, if in an enclosed area, vent the exhaust to the

outside.

Note: Oil pressure should rise within 15  seconds

after the engine starts. The engine electronic controls

monitor the engine oil  pressure. The electronic

controls will stop the engine if  the oil pressure is

below normal.

•  Do not start the engine or move any of the controls

if there is a “DO NOT OPERATE” warning tag or

similar warning tag attached to the start switch or

to the controls.

4.  When possible, allow the engine to run at no load

for approximately three minutes. Run the engine

at no load until the  water temperature gauge

has started to rise. Check all gauges during the

warm-up period.

•  Reset all of the shutoffs or alarm components (if

equipped).

•  Ensure that any equipment that is driven  by the

engine has been disengaged from the  engine.

Minimize electrical loads or remove any electrical

loads.

•  Ensure that the coolant level is correct.

•  Ensure that the engine oil level is correct.

This document has been printed from SPI². Not for Resale


 

SEBU8337

31

Operation Section

Engine Starting

i02815193

4.  Operate the engine at no load until all the coolant

temperature starts to rise. Check  the gauges

during the warm-up period.

Cold Weather Starting

Note: The oil pressures and fuel pressures should

be in the normal range on the instrument panel. Do

not apply a load to the engine until the oil pressure

gauge indicates at least normal pressure. Inspect the

engine for leaks and/or unusual noises.

Do not use aerosol types of starting aids such as

ether. Such use could  result in an explosion and

personal injury.

Note: After the ECM has completed the cold mode,

cold mode cannot be enabled again until the ECM is

switched OFF.

The engine will start at  a temperature of −10 °C

(14 °F). The ability to start at temperatures  below

10 °C (50 °F) will improve by the use of  a cylinder

block coolant heater or a device  which heats the

crankcase oil. This will help to reduce white smoke

and misfires when the  engine is started in cold

weather.

Note: Do not attempt to restart the engine until the

engine has completely stopped.

i02428473

Starting with  Jump Start

Cables

If the engine has not been run for several weeks, fuel

may have drained. Air may have moved into the filter

housing. Also, when fuel filters have been changed,

some air will be left in the  filter housing. Refer to

Operation and Maintenance Manual, “Fuel System -

Prime” in order to remove air from the fuel system.

Do not use jump start cables in  order to start the

engine. Charge the batteries or replace the batteries.

Refer to Operation  and Maintenance Manual,

“Battery - Replace”.

Use the procedure that follows  for cold weather

starting.

NOTICE

Do not  engage the  starting motor  when  flywheel is

turning. Do not start the engine under load.

If the engine fails  to start within 30 seconds, release

the starter switch or button and wait thirty seconds to

allow the starting  motor to cool  before attempting to

start the engine again.

1.  If equipped, press the start button. If equipped,

turn the keyswitch to the START position in order

to engage the electric starting motor and crank

the engine.

2.  Repeat step 1 three times if the engine fails to

start.

3.  If the engine fails to start, investigate the problem.

Use the Perkins electronic service tool. A system

fault may be indicated after the engine is started. If

this occurs the ECM has detected a problem with

the system. Investigate the cause of the problem.

Use the Perkins electronic service tool.

Note: Oil pressure should rise within 15  seconds

after the engine starts. The electronic engine controls

monitor the oil pressure. The electronic controls will

stop the engine if the oil pressure is below normal.

This document has been printed from SPI². Not for Resale


 

32

SEBU8337

Operation Section

Engine Starting

i01646248

After Starting Engine

Note: In temperatures from 0 to 60°C (32 to 140°F),

the warm-up time is approximately three minutes. In

temperatures below 0°C (32°F), additional warm-up

time may be required.

Note: Ensure that the self test  for the monitoring

system (if equipped) is completed before operating

the engine under load.

When the engine idles during warm-up, observe the

following conditions:

•  Check for any fluid or for any air leaks at idle rpm

and at one-half full rpm (no load on the  engine)

before operating the engine under load. This is not

possible in some applications.

•  Operate the engine at low idle until  all systems

achieve operating temperatures. Check all gauges

during the warm-up period.

Note: Gauge readings should be  observed and

the data should be recorded frequently  while the

engine is operating. Comparing the data over time

will help to determine  normal readings for each

gauge. Comparing data over time  will also help

detect abnormal operating developments. Significant

changes in the readings should be investigated.

This document has been printed from SPI². Not for Resale


 

SEBU8337

33

Operation Section

Engine Operation

Engine Operation

i02583385

Fuel Conservation Practices

i02578030

Engine Operation

The efficiency of the  engine can affect the fuel

economy. Perkins design  and technology in

manufacturing provides maximum fuel efficiency in

all applications. Follow the recommended procedures

in order to attain optimum performance for the life

of the engine.

Correct operation and maintenance are key factors

in obtaining the maximum  life and economy of

the engine. If the directions in  the Operation and

Maintenance Manual are followed, costs can  be

minimized and engine service life can be maximized.

•  Avoid spilling fuel.

Gauge readings should be observed and the data

should be recorded frequently  while the engine

is operating. Comparing the  data over time will

help to determine normal readings for each gauge.

Comparing data over time  will also help detect

abnormal operating developments. Significant

changes in the readings should be investigated.

Fuel expands when the fuel is warmed up. The fuel

may overflow from the fuel tank. Inspect fuel lines for

leaks. Repair the fuel lines, as needed.

•  Be aware of the properties of the different fuels.

Use only the recommended fuels.

•  Avoid unnecessary operation at no load.

Shut off the engine instead of operating the engine

at no load for long periods of time.

•  Observe the service indicator for the air cleaner

frequently, if equipped. Keep  the air cleaner

elements clean.

•  Maintain a good electrical system.

One bad battery cell will overwork the alternator. This

will consume excess power and excess fuel.

•  Ensure that the belts are properly adjusted. The

belts should be in good condition.

•  Ensure that all of the connections of the hoses are

tight. The connections should not leak.

•  Ensure that the driven  equipment is in good

working order.

•  Cold engines consume excess fuel. Keep cooling

system components clean  and keep cooling

system components in good repair. Never operate

the engine without water temperature regulators.

All of these items will  help maintain operating

temperatures.

This document has been printed from SPI². Not for Resale


 

34

SEBU8337

Operation Section

Engine Stopping

Engine Stopping

i02583411

After Stopping Engine

i02572824

Manual Stop Procedure

Note: Before you check the engine oil, do not operate

the engine for at least 10 minutes in order to allow

the engine oil to return to the oil pan.

Stopping the Engine

•  Check the crankcase oil level. Maintain the oil level

between the “LOW” mark and the “HIGH” mark on

the oil level gauge.

NOTICE

Stopping  the engine  immediately  after it  has  been

working under load, can result in overheating and ac-

celerated wear of the engine components.

Note: Only use  oil that is  recommended in

this Operation and Maintenance Manual,  “Fluid

Recommendations”. Failure to use the recommended

oil may result in engine damage.

Avoid accelerating the engine prior to shutting it down.

Avoiding  hot  engine  shutdowns  will  maximize  tur-

bocharger shaft and bearing life.

•  If necessary, perform minor adjustments. Repair

any leaks and tighten any loose bolts.

•  Note the service hour meter  reading. Perform

the maintenance that is  in the Operation and

Maintenance Manual, “Maintenance Interval

Schedule”.

Note: Individual applications will  have different

control systems. Ensure that the shutoff procedures

are understood. Use the following general guidelines

in order to stop the engine.

•  Fill the fuel  tank in order  to help prevent

accumulation of moisture in the fuel. Do not overfill

the fuel tank.

1.  Remove the load from the engine.  Allow the

engine to run under no load conditions  for five

minutes in order to cool the engine.

•  Allow the engine to cool. Check the coolant level.

Maintain the cooling system at 13 mm (0.5 inch)

from the bottom of the pipe for filling.

2.  Stop the engine after the  cool down period

according to the shutoff system on the engine and

turn the ignition keyswitch to the OFF position.

If necessary, refer to the  instructions that are

provided by the OEM.

Note: Only use coolant that  is recommended in

this Operation and Maintenance Manual,  “Fluid

Recommendations”. Failure to use the recommended

oil may result in engine damage.

Emergency Stopping

•  If freezing temperatures are  expected, check

the coolant for proper antifreeze protection. The

cooling system must be protected against freezing

to the lowest expected outside temperature. Add

the proper coolant/water mixture, if necessary.

NOTICE

Emergency shutoff controls are for EMERGENCY use

ONLY. DO  NOT  use emergency  shutoff devices  or

controls for normal stopping procedure.

•  Perform all required periodic maintenance on all

driven equipment. This maintenance is outlined in

the instructions from the OEM.

The OEM may have equipped the application with

an emergency stop button. For more  information

about the emergency stop button, refer to the OEM

information.

Ensure that any components for the external system

that support the engine operation are secured after

the engine is stopped.

This document has been printed from SPI². Not for Resale


 

SEBU8337

35

Operation Section

Cold Weather Operation

Cold Weather Operation

Personal  injury  or property  damage  can  result

from alcohol or starting fluids.

i02581613

Cold Weather Operation

Alcohol or starting fluids are highly flammable and

toxic and if improperly stored could result in injury

or property damage.

Perkins Diesel Engines can operate effectively in

cold weather. During cold weather, the starting and

the operation of the diesel engine is dependent on

the following items:

Do not use aerosol types of starting aids such as

ether. Such use could  result in an explosion and

personal injury.

•  The type of fuel that is used

•  The viscosity of the engine oil

•  Optional Cold starting aid

•  Battery condition

Viscosity of the Engine Lubrication

Oil

Correct engine oil viscosity is essential. Oil viscosity

affects the amount  of torque that  is needed

to crank the  engine. Refer to Operation  and

Maintenance Manual, “Fluid Recommendations” for

the recommended viscosity of oil.

The operation and maintenance of  an engine in

freezing temperatures is complex . This is because

of the following conditions:

•  Weather conditions

•  Engine applications

Recommendations for the Coolant

Provide cooling system protection for  the lowest

expected outside temperature. Refer to this Operation

and Maintenance Manual, “Fluid Recommendations”

for the recommended coolant mixture.

Recommendations from your Perkins distributor are

based on past proven practices. The information that

is contained in this section provides guidelines for

cold weather operation.

In cold weather, check the  coolant often for the

correct glycol concentration in  order to ensure

adequate freeze protection.

Hints for Cold Weather Operation

•  If the engine will start, operate the engine until a

minimum operating temperature of 81 °C (177.8 °F)

is achieved. Achieving operating temperature will

help prevent the intake valves and exhaust valves

from sticking.

Engine Block Heaters

Engine block heaters  (if equipped) heat the

engine jacket water that surrounds the combustion

chambers. This provides the following functions:

•  The cooling system and the lubrication  system

for the engine do not lose heat immediately upon

shutdown. This means that an engine can be shut

down for a period of time and the engine can still

have the ability to start readily.

•  Startability is improved.

An electric block heater  can be activated once

the engine is stopped. An effective block heater is

typically a 1250/1500 W unit. Consult your Perkins

distributor for more information.

•  Install the correct specification of engine lubricant

before the beginning of cold weather.

•  Check all rubber parts (hoses, fan drive belts, etc)

weekly.

•  Check all electrical wiring and connections for any

fraying or damaged insulation.

•  Keep all batteries fully charged and warm.

•  Check the air cleaners and the air intake daily.

This document has been printed from SPI². Not for Resale


 

36

SEBU8337

Operation Section

Cold Weather Operation

i02576035

•  A lower energy per unit volume of fuel

Fuel and the Effect from Cold

Weather

Note: Group 3 fuels reduce the life of the engine. The

use of Group 3 fuels is not covered by the Perkins

warranty.

Group 3 fuels include Low Temperature Fuels and

Aviation Kerosene Fuels.

Note: Only use grades of fuel that are recommended

by Perkins. Refer to this Operation and Maintenance

Manual, “Fluid Recommendations”.

Special fuels include Biofuel.

The cloud point is a temperature  that allows wax

crystals to form in the fuel. These crystals can cause

the fuel filters to plug.

The following fuels can be  used in this series of

engine.

•  Group 1

The pour point is the temperature when diesel fuel

will thicken. The diesel fuel becomes more resistant

to flow through fuel lines, fuel filters,and fuel pumps.

•  Group 2

•  Group 3

Be aware of  these facts when  diesel fuel is

purchased. Consider the average  ambient air

temperature for the engine’s application. Engines

that are fueled in one climate may not operate well if

the engines are moved to another climate. Problems

can result due to changes in temperature.

•  Special Fuels

Perkins prefer only Group 1 and Group 2 fuels for

use in this series of engines.

Group 1 fuels are the preferred Group of Fuels for

general use by Perkins. Group 1  fuels maximize

engine life and engine performance. Group 1 fuels

are usually less  available than Group 2 fuels.

Frequently, Group 1 fuels are not available in colder

climates during the winter.

Before troubleshooting for low power  or for poor

performance in the winter, check the fuel for waxing.

Low temperature fuels may be available for engine

operation at temperatures below 0 °C (32 °F). These

fuels limit the formation of  wax in the fuel at low

temperatures.

Note: Group 2 fuels must have a  maximum wear

scar of 650 micrometers (HFRR to ISO 12156-1).

For more information on cold weather operation, refer

to the Operation and Maintenance Manual, “Cold

Weather Operation and Fuel Related Components in

Cold Weather”.

Group 2 fuels are considered acceptable for issues

of warranty. This group of fuels may reduce the life

of the engine, the engine’s maximum power, and the

engine’s fuel efficiency.

When Group 2 diesel fuels are used the  following

components provide a means of minimizing problems

in cold weather:

•  Glow plugs (if equipped)

•  Engine coolant heaters, which may be an OEM

option

•  Fuel heaters, which may be an OEM option

•  Fuel line insulation, which may be an OEM option

There are three major differences between Group

1 fuels and Group 2 fuels. Group 1 fuels  have the

following different characteristics to Group 2 fuels.

•  A lower cloud point

•  A lower pour point

This document has been printed from SPI². Not for Resale


 

SEBU8337

37

Operation Section

Cold Weather Operation

i02583420

Fuel Related Components in

Cold Weather

Fuel Tanks

Condensation can form in partially filled fuel tanks.

Top off the fuel tanks after you operate the engine.

Fuel tanks should contain some provision for draining

water and sediment from the bottom of the  tanks.

Some fuel tanks use supply pipes that allow water

and sediment to settle below  the end of the fuel

supply pipe.

Some fuel tanks use  supply lines that take fuel

directly from the bottom of the tank. If the engine is

equipped with this system, regular maintenance of

the fuel system filter is important.

Drain the water and sediment from any fuel storage

tank at the following intervals: weekly, oil changes,

and refueling of the fuel tank. This will help prevent

water and/or sediment from being pumped from the

fuel storage tank and into the engine fuel tank.

Fuel Filters

A primary fuel filter is  installed between the fuel

tank and the engine fuel  inlet. After you change

the fuel filter, always prime the fuel system in order

to remove air bubbles from the fuel system. Refer

to the Operation and Maintenance Manual  in the

Maintenance Section for more information on priming

the fuel system.

The micron rating and the location of a primary fuel

filter is important in cold  weather operation. The

primary fuel filter and the fuel supply line are the most

common components that are affected by cold fuel.

This document has been printed from SPI². Not for Resale


 

38

SEBU8337

Maintenance Section

Refill Capacities

Maintenance Section

i03040206

Fluid Recommendations

Refill Capacities

Cooling System Specifications

i02793514

Refill Capacities

General Coolant Information

NOTICE

Never add coolant  to an overheated  engine. Engine

damage could result. Allow the engine to cool first.

Lubrication System

The refill capacities  for the engine crankcase

NOTICE

reflect the approximate capacity of the crankcase

or sump plus standard oil filters. Auxiliary  oil filter

systems will require additional oil. Refer to the OEM

specifications for the capacity of the auxiliary oil filter.

Refer to the Operation and Maintenance Manual,

“Maintenance Section” for more  information on

Lubricant Specifications.

If the engine is to be stored in, or shipped  to an area

with below freezing temperatures, the cooling system

must be either protected to the lowest outside temper-

ature or drained completely to prevent damage.

NOTICE

Frequently check the specific gravity of the coolant for

proper freeze protection or for anti-boil protection.

Table 3

Engine

Refill Capacities

Clean the cooling system for the following reasons:

•  Contamination of the cooling system

•  Overheating of the engine

Compartment or System

Crankcase Oil Sump

Maximum

(1)

40 L (8.8 Imp gal)

(1)  These values are the approximate capacities for the crankcase

oil sump (aluminum) which  includes the standard factory

installed oil filters. Engines with auxiliary oil filters will require

additional oil. Refer to the OEM specifications for the capacity

of the auxiliary oil filter.

•  Foaming of the coolant

NOTICE

Cooling System

Never operate  an engine without  water temperature

regulators in the  cooling system. Water  temperature

regulators help to maintain  the engine coolant at the

proper operating temperature.  Cooling system prob-

lems can develop  without water temperature regula-

tors.

Refer to the OEM specifications  for the External

System capacity. This capacity information will be

needed in order to determine the amount of coolant

that is required for the Total Cooling System.

Table 4

Many engine failures are  related to the cooling

system. The following problems are related to cooling

system failures: Overheating, leakage of the water

pump, and plugged radiators or heat exchangers.

Engine

Refill Capacities

Compartment or System

Engine Only

External System Per OEM

Liters

15  L

(3.3 Imp gal)

These failures can be avoided with correct cooling

system maintenance. Cooling system maintenance is

as important as maintenance of the fuel system and

the lubrication system. Quality of the coolant is as

important as the quality of the fuel and the lubricating

oil.

25.5  L

(5.6 Imp gal)

(1)

(1)  The External System includes a radiator  or an expansion

tank with the following  components: heat exchanger and

piping. Refer to the OEM specifications. Enter the value for the

capacity of the External System in this row.

Coolant is normally composed of three elements:

Water, additives, and glycol.

This document has been printed from SPI². Not for Resale


 

SEBU8337

39

Maintenance Section

Refill Capacities

Water

•  Formation of gel compounds

•  Reduction of heat transfer

Water is used in  the cooling system in order to

transfer heat.

•  Leakage of the water pump seal

Distilled water  or deionized  water is

recommended for use in engine cooling systems.

•  Plugging of radiators, coolers, and small passages

DO NOT use the following types of water in cooling

systems: Hard water, softened water that has been

conditioned with salt, and sea water.

Glycol

Glycol in the coolant helps  to provide protection

against the following conditions:

If distilled water or deionized water is not available,

use water with the properties that are listed in Table 5.

•  Boiling

Table 5

•  Freezing

Acceptable Water

•  Cavitation of the water pump

Property

Chloride (Cl)

Sulfate (SO4)

Total Hardness

Total Solids

Acidity

Maximum Limit

40 mg/L

For optimum performance, Perkins recommends a

1:1 mixture of a water/glycol solution.

100 mg/L

170 mg/L

Note: Use a mixture that  will provide protection

against the lowest ambient temperature.

340 mg/L

pH of  5.5 to 9.0

Note: 100 percent pure  glycol will freeze at  a

temperature of −23 °C (−9 °F).

For a water analysis, consult one of  the following

sources:

Most conventional antifreezes use ethylene glycol.

Propylene glycol may also be used. In a 1:1 mixture

with water, ethylene and propylene glycol provide

similar protection against freezing and boiling. See

Tables 6 and 7.

•  Local water utility company

•  Agricultural agent

Table 6

•  Independent laboratory

Ethylene Glycol

Additives

Freeze

Protection

Boil

Protection

Concentration

Additives help to protect  the metal surfaces of

the cooling system. A lack of coolant  additives or

insufficient amounts of additives enable the following

conditions to occur:

50 Percent

60 Percent

−36 °C (−33 °F)   106 °C (223 °F)

−51 °C (−60 °F)   111 °C (232 °F)

NOTICE

•  Corrosion

Do not use propylene glycol in concentrations that ex-

ceed 50 percent glycol because of propylene glycol’s

reduced heat transfer capability.  Use ethylene glycol

in conditions that require additional protection against

boiling or freezing.

•  Formation of mineral deposits

•  Rust

•  Scale

Table 7

•  Foaming of the coolant

Propylene Glycol

Many additives are depleted during engine operation.

These additives must be replaced periodically.

Freeze

Protection

Anti-Boil

Protection

Concentration

50 Percent

−29 °C (−20 °F)     106 °C (223 °F)

Additives must be added at the correct concentration.

Overconcentration of additives  can cause the

inhibitors to drop out-of-solution. The deposits can

enable the following problems to occur:

To check the concentration of glycol in the coolant,

measure the specific gravity of the coolant.

This document has been printed from SPI². Not for Resale


 

40

SEBU8337

Maintenance Section

Refill Capacities

Coolant Recommendations

Extended Life Coolant (ELC)

The following two coolants are used in Perkins diesel

engines:

Perkins provides Extended Life Coolant (ELC) for

use in the following applications:

Preferred  – Perkins Extended Life Coolant (ELC)

•  Heavy-duty spark ignited gas engines

•  Heavy-duty diesel engines

•  Automotive applications

Acceptable  – A commercial heavy-duty antifreeze

that meets “ASTM D4985” specifications

NOTICE

The anti-corrosion package for ELC is different from

the anti-corrosion package for other coolants. ELC

is an ethylene glycol base coolant. However, ELC

contains organic corrosion inhibitors and antifoam

agents with low amounts of  nitrite. Perkins ELC

has been formulated with the  correct amount of

these additives in order to provide superior corrosion

protection for all metals in engine cooling systems.

Do not use  a commercial coolant/antifreeze that  on-

ly meets the ASTM D3306 specification. This  type of

coolant/antifreeze is made for  light automotive appli-

cations.

Perkins recommends a 1:1 mixture of  water and

glycol. This mixture of water and glycol will provide

optimum heavy-duty performance as a antifreeze.

This ratio may be increased to 1:2 water to glycol if

extra freezing protection is required.

ELC is available in a 1:1 premixed  solution . The

Premixed ELC provides freeze protection to −36 °C

(−33 °F). The Premixed ELC is recommended for the

initial fill of the cooling system. The Premixed ELC is

also recommended for topping off the cooling system.

Note: A commercial heavy-duty  antifreeze that

meets “ASTM D4985” specifications MAY require a

treatment with an SCA at the initial fill. Read the label

or the instructions that are provided by the OEM of

the product.

ELC Concentrate is also available. ELC Concentrate

can be used to lower the freezing point  to −51 °C

(−60 °F) for arctic conditions.

In stationary engine applications and marine engine

applications that do not require anti-boil protection

or freeze protection, a mixture of  SCA and water

is acceptable. Perkins recommends a six percent

to eight percent concentration  of SCA in those

cooling systems. Distilled water or deionized water

is preferred. Water which has the  recommended

properties may be used.

Containers of several sizes are available. Consult

your Perkins dealer or your Perkins distributor for the

part numbers.

ELC Cooling System Maintenance

Correct additions to the Extended Life

Coolant

Engines that are operating in an ambient temperature

above 43 °C (109.4 °F) must use SCA and water.

Engines that operate in an  ambient temperature

above 43 °C (109.4 °F) and below 0 °C (32 °F) due

to seasonal variations consult your Perkins dealer

or your Perkins distributor for the  correct level of

protection.

NOTICE

Use only Perkins  products for pre-mixed  or concen-

trated coolants.

Mixing Extended Life Coolant with other products re-

duces the Extended Life Coolant service life. Failure to

follow the recommendations can reduce cooling  sys-

tem components life unless appropriate corrective ac-

tion is performed.

Table 8

Coolant Service  Life

Coolant Type

Service Life

6,000 Service Hours  or

Three Years

Perkins ELC

In order to maintain the correct balance  between

the antifreeze and the additives, you must maintain

the recommended concentration of Extended Life

Coolant (ELC). Lowering the proportion of antifreeze

lowers the proportion of additive. This will lower the

ability of the coolant to protect the system from pitting,

from cavitation, from erosion, and from deposits.

Commercial Heavy-Duty

Antifreeze that meets

“ASTM D4985”

3000 Service Hours  or

Two Years

Perkins POWERPART

SCA

3000 Service Hours  or

Two Years

Commercial SCA and

Water

3000 Service Hours  or

Two Years

This document has been printed from SPI². Not for Resale


 

SEBU8337

41

Maintenance Section

Refill Capacities

6.  Fill the cooling system with clean  water and

operate the engine until the engine is warmed to

49° to 66°C (120° to 150°F).

NOTICE

Do not use a conventional coolant to top-off a cooling

system that is filled with Extended Life Coolant (ELC).

NOTICE

Do not  use  standard supplemental  coolant additive

(SCA).

Incorrect or incomplete flushing of the cooling system

can result in damage to copper and other metal com-

ponents.

When using Perkins ELC, do not use standard SCA’s

or SCA filters.

To avoid damage to the cooling system, make sure to

completely flush the cooling system  with clear water.

Continue to flush the system until  all the signs of the

cleaning agent are gone.

ELC Cooling System Cleaning

Note: If the cooling system is already using  ELC,

cleaning agents are not  required to be used at

the specified coolant change  interval. Cleaning

agents are only required if the  system has been

contaminated by the addition of some other type of

coolant or by cooling system damage.

7.  Drain the cooling system into a suitable container

and flush the cooling system with clean water.

Note: The cooling system cleaner must be thoroughly

flushed from the cooling system. Cooling  system

cleaner that is left in the system will contaminate the

coolant. The cleaner may also corrode the cooling

system.

Clean water is the only cleaning agent that is required

when ELC is drained from the cooling system.

After the cooling system is drained  and after the

cooling system is refilled, operate the engine while

the cooling system filler cap is removed.  Operate

the engine until the coolant level reaches the normal

operating temperature and until the coolant  level

stabilizes. As needed, add the coolant  mixture in

order to fill the system to the specified level.

8.  Repeat Steps 6 and  7 until the system  is

completely clean.

9.  Fill the cooling system with the Perkins Premixed

ELC.

ELC Cooling System Contamination

Changing to Perkins ELC

NOTICE

Mixing ELC with other products reduces the effective-

ness of  the ELC and  shortens the  ELC service life.

Use only  Perkins Products  for premixed or  concen-

trate coolants.  Failure to follow  these recommenda-

tions can result  in shortened cooling system compo-

nent life.

To change from heavy-duty antifreeze to the Perkins

ELC, perform the following steps:

NOTICE

Care  must  be  taken  to  ensure  that  all  fluids  are

contained  during  performance of  inspection,  main-

tenance,  testing,  adjusting   and  the  repair  of   the

product. Be prepared to collect the  fluid with suitable

containers before  opening any  compartment or  dis-

assembling any component containing fluids.

ELC cooling systems can withstand contamination to

a maximum of ten percent of conventional heavy-duty

antifreeze or SCA. If the contamination exceeds ten

percent of the total system capacity, perform ONE of

the following procedures:

Dispose of all fluids according to local regulations and

mandates.

•  Drain the cooling system into a suitable container.

Dispose of the  coolant according to  local

regulations. Flush the system with clean water. Fill

the system with the Perkins ELC.

1.  Drain the coolant into a suitable container.

2.  Dispos, e of the coolant  according to local

regulations.

•  Drain a portion of the cooling system into a suitable

container according to local regulations. Then, fill

the cooling system with premixed ELC. This should

lower the contamination to less than 10 percent.

3.  Flush the system with clean water in  order to

remove any debris.

4.  Use Perkins cleaner to clean the system. Follow

the instruction on the label.

•  Maintain the system as a conventional Heavy-Duty

Coolant. Treat the system with an SCA. Change

the coolant at the interval that is recommended for

the conventional Heavy-Duty Coolant.

5.  Drain the cleaner into a suitable container. Flush

the cooling system with clean water.

This document has been printed from SPI². Not for Resale


 

42

SEBU8337

Maintenance Section

Refill Capacities

Commercial Heavy-Duty Antifreeze and

SCA

Table 11 is an example for using the equation that

is in Table 10.

Table 11

NOTICE

Example Of The Equation For Adding The SCA To

The Heavy-Duty Coolant At The Initial  Fill

Commercial   Heavy-Duty  Coolant   which   contains

Amine as part of the corrision protection system must

not be used.

Total Volume

of the Cooling

System (V)

Multiplication

Factor

Amount of SCA

that is Required

(X)

NOTICE

Never operate  an engine without  water temperature

regulators in the  cooling system. Water  temperature

regulators help to maintain  the engine coolant at the

correct operating temperature. Cooling  system prob-

lems can develop  without water temperature regula-

tors.

15 L (4 US gal)

× 0.045

0.7 L (24 oz)

Adding The SCA to  The Heavy-Duty

Coolant For Maintenance

Heavy-duty antifreeze of all types REQUIRE periodic

additions of an SCA.

Check the antifreeze  (glycol concentration) in

order to ensure adequate protection against boiling

or freezing. Perkins recommends  the use of a

refractometer for checking the glycol concentration.

Test the antifreeze periodically for the concentration

of SCA. For the  interval, refer to the Operation

and Maintenance Manual, “Maintenance Interval

Schedule” (Maintenance  Section). Test the

concentration of SCA.

Perkins engine cooling systems should be tested

at 500 hour  intervals for the concentration of

Supplemental Coolant Additive (SCA).

Additions of SCA are based on the  results of the

test. The size of the cooling system determines the

amount of SCA that is needed.

Additions of SCA are based on the results of the test.

An SCA that is liquid may be needed  at 500 hour

intervals.

Use the equation that is in Table 12 to determine the

amount of Perkins SCA that is required, if necessary:

Refer to Table 9 for part numbers and for quantities

of SCA.

Table 12

Equation For Adding The SCA To The Heavy-Duty

Coolant For  Maintenance

Table 9

Perkins Liquid  SCA

V ×  0.014 =  X

Part Number

Quantity

V is the total volume of the cooling system.

X is the amount of SCA that is required.

21825755

.

Adding the SCA to Heavy-Duty Coolant

at the Initial Fill

Table 13 is an example for using the equation that

is in Table 12.

Commercial heavy-duty antifreeze that meets “ASTM

D4985” specifications MAY require an addition of

SCA at the initial fill. Read the label or the instructions

that are provided by the OEM of the product.

Table 13

Example Of The Equation For Adding The SCA To

The Heavy-Duty Coolant For Maintenance

Total Volume

of the Cooling

System (V)

Multiplication

Factor

Amount of SCA

that is Required

(X)

Use the equation that is in Table 10 to determine the

amount of Perkins SCA that is required when  the

cooling system is initially filled.

15 L (4 US gal)

× 0.014

0.2 L (7 oz)

Table 10

Equation For Adding The SCA To The Heavy-Duty

Coolant At  The Initial Fill

V ×  0.045 =  X

V is the total volume of the cooling system.

X is the amount of SCA that is required.

This document has been printed from SPI². Not for Resale


 

SEBU8337

43

Maintenance Section

Refill Capacities

Cleaning the System  of Heavy-Duty

Antifreeze

NOTICE

These recommendations are subject to change  with-

out notice.  Contact your local  Perkins distributor  for

the most up to date recommendations.

Perkins cooling system cleaners  are designed

to clean the  cooling system of harmful  scale

and corrosion. Perkins cooling system  cleaners

dissolve mineral scale, corrosion products, light oil

contamination and sludge.

Diesel Fuel Requirements

•  Clean the cooling system after used  coolant is

drained or before the cooling system is filled with

new coolant.

Satisfactory engine performance is dependent on

the use of a good quality fuel.  The use of a good

quality fuel will give the following results: long engine

life and acceptable exhaust emissions levels. The

fuel must meet the minimum requirements that are

stated in table 14.

•  Clean the cooling system whenever the coolant is

contaminated or whenever the coolant is foaming.

NOTICE

i03040204

Fluid Recommendations

(Fuel Specification)

The footnotes are a key part of the Perkins Specifica-

tion for Distillate  Diesel Fuel Table. Read ALL of  the

footnotes.

•  Glossary

•  ISO International Standards Organization

•  ASTM American Society for Testing and Materials

•  HFRR High Frequency Reciprocating  Rig for

Lubricity testing of diesel fuels

•  FAME Fatty Acid Methyl Esters

•  CFR Co-ordinating Fuel Research

•  LSD Low Sulfur Diesel

•  ULSD Ultra Low Sulfur Diesel

•  RME Rape Methyl Ester

•  SME Soy Methyl Ester

•  EPA Environmental Protection Agency  of the

United States

General Information

NOTICE

Every attempt is made to provide accurate, up to date

information. By use  of this document you  agree that

Perkins Engines Company Limited is not responsible

for errors or omissions.

This document has been printed from SPI². Not for Resale


 

44

SEBU8337

Maintenance Section

Refill Capacities

Table 14

Perkins Specification  for Distillate Diesel  Fuel

(1)

Property

Aromatics

Ash

UNITS

Requirements

35% maximum

0.01% maximum

0.35% maximum

“ASTM”Test

D1319

“ISO”Test

“ISO”3837

“ISO”6245

“ISO”4262

%Volume

%Weight

%Weight

D482

Carbon Residue on

10% Bottoms

D524

Cetane Number

Cloud Point

(2)

-

40 minimum

D613/D6890

D2500

“ISO”5165

“ISO”3015

°C

The cloud point must

not exceed the lowest

expected ambient

temperature.

-

Copper  Strip

Corrosion

No. 3 maximum

D130

“ISO”2160

Density at  15 °C

(59 °F)

Kg / M

°C

3

801 minimum and 876

maximum

No equivalent test

D86

“ISO 3675 ”“ISO 12185”

“ISO”3405

(3)

Distillation

10%  at 282  °C

(539.6 °F) maximum

90% at 360 °C (680 °F)

maximum

Flash Point

°C

-

legal limit

D93

“ISO”2719

Thermal Stability

Minimum of  80%

reflectance after aging

for 180  minutes at

150 °C (302 °F)

D6468

No equivalent test

Pour Point

°C

6 °C (42.8 °F) minimum

below  ambient

D97

“ISO”3016

temperature

Sulfur

(1)(4)

%mass

1% maximum

D5453/D26222

D445

“ISO 20846 ”“ISO 20884”

“ISO”3405

Kinematic Viscosity

(5)

“MM”

2

“/S (cSt)”

The viscosity of  the

fuel that is delivered to

the fuel injection pump.

“1.4 minimum/4.5

maximum”

Water and sediment

Water

% weight

% weight

% weight

0.1% maximum

0.1% maximum

0.05% maximum

D1796

D1744

D473

“ISO”3734

No equivalent test

“ISO”3735

Sediment

(continued)

This document has been printed from SPI². Not for Resale


 

SEBU8337

45

Maintenance Section

Refill Capacities

(Table 14, contd)

Gums and Resins

(6)

mg/100mL

mm

10 mg  per 100 mL

maximum

D381

“ISO”6246

Lubricity corrected

0.52 maximum

D6079

“ISO”12156-1

wear scar diameter at

60 °C (140 °F).

(7)

(1)  This specification includes the requirements for Ultra Low Sulfur Diesel (ULSD). ULSD fuel will have ≤ 15 ppm (0.0015%) sulfur. Refer to

“ASTM D5453”, “ASTM D2622”, or “ISO 20846, ISO  20884” test methods. This specification includes the requirements for Low Sulfur

Diesel (LSD). LSD fuel will have ≤500 ppm (0.05%) sulfur. Refer to following:“ASTM 5453, ASTM D2622”,  “ISO 20846”, and “ISO 20884

test methods”.

(2)  A fuel with a higher cetane number is recommended in order to operate at a higher altitude or in cold weather.

(3)  “Via standards tables, the equivalent API gravity for the minimum density of 801  kg / m

3

(kilograms per cubic meter) is 45 and for  the

maximum density of 876 kg  / m  is 30”.

3

(4)  Regional regulations, national regulations or international regulations can require a fuel with a specific sulfur limit. Consult all applicable

regulations before selecting a fuel for a given engine application. Perkins fuel systems and engine components can operate on high sulfur

fuels. Fuel sulfur levels affect exhaust emissions.  High sulfur fuels also increase the potential for corrosion  of internal components.

Fuel sulfur levels above 0.5% may significantly  shorten the oil change interval. For additional information, refer to this manual, “Fluid

recommendations (General lubricant Information)”.

(5)  The values of the fuel viscosity are the values as the fuel is delivered to the  fuel injection pumps. Fuel should also meet the minimum

viscosity requirement and the fuel should meet the maximum viscosity  requirements at 40 °C (104 °F) of either the “ASTM D445” test

method or the “ISO 3104” test method. If a fuel  with a low viscosity is used, cooling of the fuel may be required to maintain  1.4 cSt or

greater viscosity at the fuel injection pump. Fuels  with a high viscosity might require fuel heaters in order to lower  the viscosity to 4.5

cSt at the fuel  injection pump.

(6)  Follow the test conditions and procedures for gasoline  (motor).

(7)  The lubricity of a fuel is a concern with low sulfur and ultra low  sulfur fuel. To determine the lubricity of the fuel, use the “ISO 12156-1

or ASTM D6079 High Frequency Reciprocating  Rig (HFRR)” test. If the lubricity of a fuel does not meet  the minimum requirements,

consult your fuel supplier. Do not treat the fuel without consulting the fuel  supplier. Some additives are not compatible. These additives

can cause problems in the  fuel system.

Fuel with a low cetane number can be the root cause

of problems during cold start.

NOTICE

Operating with fuels that do not meet the Perkins rec-

ommendations can cause the following effects: Start-

ing difficulty, poor combustion, deposits in the fuel in-

jectors, reduced  service life  of the  fuel system,  de-

posits in the  combustion chamber, and reduced ser-

vice life of the engine.

Viscosity

Viscosity is the  property of a liquid of  offering

resistance to shear or flow. Viscosity decreases with

increasing temperature. This decrease in viscosity

follows a logarithmic relationship for normal fossil

fuel. The common reference is to kinematic viscosity.

This is the quotient of the dynamic viscosity that is

divided by the density. The determination of kinematic

viscosity is normally by readings from gravity flow

viscometers at standard temperatures. Refer to “ISO

3104” for the test method.

Diesel Fuel Characteristics

Perkins Recommendation

Cetane Number

The viscosity of the fuel is significant because fuel

serves as a lubricant for the fuel system components.

Fuel must have sufficient viscosity in order to lubricate

the fuel system in both extremely cold temperatures

and extremely hot temperatures. If the  kinematic

viscosity of the fuel is lower than 1.4 cSt at the fuel

injection pump damage to the fuel injection pump

can occur. This damage can be excessive scuffing

and seizure. Low viscosity may lead to difficult hot

restarting, stalling and loss of performance.  High

viscosity may result in seizure of the pump.

Fuel that has a high cetane number will give a shorter

ignition delay. This will produce  a better ignition

quality. Cetane numbers are derived for fuels against

proportions of cetane and heptamethylnonane in the

standard CFR engine. Refer to “ISO 5165” for the

test method.

Cetane numbers in  excess of 45 are normally

expected from current diesel fuel. However, a cetane

number of 40 may be experienced in some territories.

The United States of America is one of the territories

that can have a low cetane value. A minimum cetane

value of 40 is  required during average starting

conditions. A higher cetane value may be required

for operations at high altitudes or in  cold weather

operations.

Perkins recommends kinematic viscosities of 1.4 and

4.5 mm2/sec that is delivered to the  fuel injection

pump.

This document has been printed from SPI². Not for Resale


 

46

SEBU8337

Maintenance Section

Refill Capacities

Density

Lubricity

Density is the mass  of the fuel per unit volume

at a specific temperature. This  parameter has a

direct influence on engine performance and a direct

influence on emissions. This determines the heat

output from a given injected volume  of fuel. This

is generally quoted in the following kg/m at  15 °C

(59 °F).

This is the capability of the  fuel to prevent pump

wear. The fluid’s lubricity describes the ability of the

fluid to reduce the friction between surfaces that are

under load. This ability reduces the damage that is

caused by friction. Fuel injection systems rely on the

lubricating properties of the fuel. Until fuel sulfur limits

were mandated, the fuel’s lubricity was  generally

believed to be a function of fuel viscosity.

Perkins recommends a value of density of 841 kg/m

in order to obtain the correct power output. Lighter

fuels are acceptable but these fuels will not produce

the rated power.

The lubricity has particular significance to the current

low viscosity fuel, low sulfur fuel and low aromatic

fossil fuel. These fuels are made in order  to meet

stringent exhaust emissions. A  test method for

measuring the lubricity of  diesel fuels has been

developed and the test  is based on the HFRR

method that is operated at 60 °C (140 °F). Refer to

“ISO 12156 part 1 and CEC document F06-A-96” for

the test method.

Sulfur

The level of  sulfur is governed by  emissions

legislations. Regional regulation, national regulations

or international regulations can require a fuel with

a specific sulfur limit. The sulfur content of the fuel

and the fuel quality must comply with all existing local

regulations for emissions.

Lubricity wear scar diameter of 0.52 mm (0.0205 inch)

MUST NOT be exceeded. The fuel lubricity test must

be performed on a HFRR, operated at 60 °C (140 °F).

Refer to “ISO 12156-1 ”.

By using the test methods “ASTM D5453,  ASTM

D2622, or ISO 20846 ISO 20884”,  the content of

sulfur in low sulfur diesel (LSD) fuel must be below

500 PPM 0.05%. By using the test methods “ASTM

D5453, ASTM D2622, or ISO 20846 ISO 20884”, the

content of sulfur in ultra low sulfur (ULSD) fuel must

be below 15 PPM 0.0015%. The use of LSD fuel and

the use of ULSD fuel are acceptable provided that the

fuels meet the minimum requirements that are stated

in table 14. The lubricity  of these fuels must not

exceed wear scar diameter of 0.52 mm (0.0205 inch).

The fuel lubricity test must be performed on a HFRR,

operated at 60 °C (140 °F). Refer to “ISO 12156-1 ”.

Fuel additives can enhance the lubricity of  a fuel.

Contact your fuel supplier for those circumstances

when fuel additives are required. Your fuel supplier

can make recommendations for additives to  use

and for the proper  level of treatment. For more

information, refer to “Fuel Additive”.

Distillation

This is an indication  of the mixture of different

hydrocarbons in the fuel. A high ratio of light weight

hydrocarbons can affect the  characteristics of

combustion.

In some parts of the world and for some applications,

high sulfur fuels above 0.5% by  mass might only

be available. Fuel with  very high sulfur content

can cause engine wear. High sulfur fuel will  have

a negative impact on  emissions of particulates.

High sulfur fuel can be used provided that the local

emissions legislation will allow the use. High sulfur

fuel can be used in countries that do  not regulate

emissions.

Classification of the Fuels

Diesel engines have the ability to burn a wide variety

of fuels. These fuels are divided into  four general

groups: Ref to table 15

When only high sulfur  fuels are available, it will

be necessary that high alkaline  lubricating oil is

used in the engine or that the lubricating oil change

interval is reduced. Refer  to this Operation and

Maintenance Manual, “Fliud Recommendations

(Genernal Lubrication Information)” for information

on sulfur in fuel.

This document has been printed from SPI². Not for Resale


 

SEBU8337

47

Maintenance Section

Refill Capacities

Table 15

•  “MIL-DTL-5624U NATO F44 (JP-5)”

Fuel Groups

Group 1

Classification

•  “MIL-DTL-38219D (USAF) F44 JP-7”

•  “NATO F63”

Preferred fuels

Full life of the

Product

Group 2

Group 3

Group 4

Permissible

fuels with  an

appropriate fuel

additive

These fuels

MAY cause

reduced

engine life and

performance

•  “NATO XF63”

•  “ASTM D1655 JET A”

•  “ASTM D1655 JET A1”

Permissible

fuels with  an

appropriate fuel

additive

These fuels

WILL cause

reduced

engine life and

performance

Note: These fuels are only acceptable provided that

these fuels are used with an appropriate fuel additive.

These fuels must meet the requirements that  are

stated in table 14. Fuel samples should be analyzed

for the compliance. These fuels MUST NOT exceed

lubricity wear scar diameter of 0.52 mm (0.0205 inch).

The fuel lubricity test  must be performed on a

HFRR, operated at 60 °C (140  °F). Refer to “ISO

12156-1 ”. Fuels must have minimum viscosity  of

1.4 centistokes that is delivered to the fuel injection

pump. Fuel cooling may be  required in order to

maintain minimum viscosity of 1.4 centistokes that is

delivered to the fuel injection pump.

Biodiesel

Group 1 Specifications (Preferred Fuels)

This group of  fuel specifications is considered

acceptable:

•  EN590 DERV Grade A, B, C, E, F, Class, 0, 1, 2,

3, and 4

Group 3 Specifications (Permissible

Fuels)

•  “BS2869 Class A2” Off-Highway  Gas Oil Red

Diesel

•  “ASTM D975”, Class 1D , and Class 2D

This group of fuel specification must be used only

with the appropriate fuel additive. This  fuel WILL

reduce engine life and performance.

•  “JIS K2204 Grades 1,2,3 and Special Grade  3”

This grade of fuel must meet the minimum lubricity

requirements that are stated in table 14.

“JIS 2203#1 and #2 Toyu”

Note: The use of LSD fuel  and the use of ULSD

fuel is acceptable provided that the fuels meet the

minimum requirements that are stated in table 14.

The lubricity of these fuels must not exceed  wear

scar diameter of 0.52 mm (0.0205 inch). The lubricity

test must be performed on a  HFRR, operated at

60 °C (140 °F). Refer to “ISO 12156-1 ”. By using the

test methods “ASTM D5453, ASTM D2622, or ISO

20846 ISO 20884”, the content of sulfur in LSD fuel

must be below 500 PPM 0.05%. By using the  test

methods “ASTM D5453, ASTM D2622, or ISO 20846

ISO 20884”, the content of sulfur in ULSD fuel must

be below 15 PPM 0.0015%.

Note: These fuels are only acceptable provided that

these fuels are used with an appropriate fuel additive.

These fuels must meet the requirements that  are

stated in table 14. Fuel samples should be analyzed

for the compliance. These fuels MUST NOT exceed

lubricity wear scar diameter of 0.52 mm (0.0205 inch).

The fuel lubricity test  must be performed on a

HFRR, operated at 60 °C (140  °F). Refer to “ISO

12156-1 ”. Fuels must have minimum viscosity  of

1.4 centistokes that is delivered to the fuel injection

pump. Fuel cooling may  be required in order to

maintain minimum viscosity of 1.4 centistokes that is

delivered to the fuel injection pump.

Group 2 Specifications  (Permissible

Fuels)

Group 4 Biodiesel

Biodiesel is a fuel that can be defined as mono-alkyl

esters of fatty acids. Biodiesel  is a fuel that can

be made from a  variety of feedstock. The most

commonly available biodiesel in europe  is Rape

Methyl Ester (REM). This biodiesel is derived from

rapeseed oil. Soy Methyl Ester (SME) is the most

common biodiesel in the United States. This biodiesel

is derived from soybean oil. Soybean oil or rapeseed

oil are the primary  feedstocks. These fuels are

together known as Fatty Acid Methyl Esters (FAME).

This group of  fuel specifications is considered

acceptable, but only with an appropriate fuel additive,

but these fuels MAY reduce  the engine life and

performance.

•   “MIL-DTL-83133E NATO F34 (JP-8)”

•  “MIL-DTL-83133E NATO F35 ”

This document has been printed from SPI². Not for Resale


 

48

SEBU8337

Maintenance Section

Refill Capacities

Raw pressed vegetable oils are NOT acceptable for

use as a fuel in any concentration in compression

engines. Without esterification, these oils gel in the

crankcase and the fuel tank. These fuels may not be

compatible with many of the elastomers that are used

in engines that are manufactured today. In original

forms, these oils are not suitable for use  as a fuel

in compression engines. Alternate base stocks for

biodiesel may include animal tallow, waste cooking

oils, or a variety of other feedstocks. In order to use

any of the products that are  listed as fuel, the oil

must be esterified.

•  Biodiesel may pose low ambient  temperature

problems for both storage and operation. At low

ambient temperatures, fuel may need to be stored

in a heated building or a heated storage tank. The

fuel system may require heated fuel lines, filters,

and tanks. Filters may plug and fuel in the tank may

solidify at low ambient temperatures if precautions

are not taken. Consult your biodiesel supplier for

assistance in the blending and attainment of the

proper cloud point for the fuel.

•  Biodiesel has poor  oxidation stability, which

can result in long term problems in  the storage

of biodiesel. The poor  oxidation stability may

accelerate fuel oxidation  in the fuel system.

This is especially true in engines with electronic

fuel systems because these engines operate at

higher temperatures. Consult the fuel supplier for

oxidation stability additives.

Note: Engines that are manufactured by  Perkins

are certified by use of the prescribed Environmental

Protection Agency (EPA) and European Certification

fuels. Perkins does not certify engines on any other

fuel. The user of the engine has the responsibility

of using the correct fuel that  is recommended by

the manufacturer and allowed by the EPA and other

appropriate regulatory agencies.

•  Biodiesel is a fuel that can be made from a variety

of feedstock. The feedstock  that is used can

affect the performance of the product. Two of the

characteristics of the fuel that  are affected are

cold flow and oxidation stability. Contact your fuel

supplier for guidance.

Recommendation for the use of biodiesel

The neat biodiesel must conform to “EN14214” or

“ASTM D6751” regulations. A maximum  of 30%

mixture of biodiesel can be used in mineral diesel fuel.

The mineral diesel fuel must conform to “EN590”,

“ASTM D975” or “BS2869 Grade A2” regulations.

•  Biodiesel or biodiesel blends are not recommended

for engines that will operate occasionally.  This

is due to poor oxidation  stability. If the user is

prepared to accept some risk, then limit biodiesel

to a maximum of B5. Examples of applications that

should limit the use of biodiesel are the following:

Standby Generator sets and certain emergency

vehicles

Note: When biodiesel, or any blend of biodiesel is

used, the user has the responsibility for obtaining the

proper local exemptions, regional exemptions, and/or

national exemptions that are required for  the use

of biodiesel in any Perkins engine that is regulated

by emissions standards. Biodiesel that meets EN

14214 is acceptable. The biodiesel must be blended

with an acceptable  distillate diesel fuel at the

•  Biodiesel is an excellent medium for  microbial

contamination and growth. Microbial contamination

and growth can cause corrosion in the fuel system

and premature plugging of  the fuel filter. The

use of conventionalanti-microbial additives and

the effectiveness of conventional anti-microbial

additives in biodiesel is not known. Consult your

supplier of fuel and additive for assistance.

maximum stated percentages. However, the following

operational recommendations must be followed:

•  The oil change interval can be affected by the use

of biodiesel. Use Services Oil Analysis in  order

to monitor the condition of  the engine oil. Use

Services Oil Analysis also in order to determine the

oil change interval that is optimum.

•  Care must be taken in  order to remove water

from fuel tanks.  Water accelerates microbial

contamination and growth. When biodiesel  is

compared to distillate fuels, water is naturally more

likely to exist in the biodiesel.

•  Confirm that biodiesel is acceptable for use with

the manufacturer of the fuel filters.

•  In a comparison of distillate  fuels to biodiesel,

biodiesel provides less energy per gallon by 5% to

7%. Do NOT change the engine rating in order to

compensate for the power loss. This will help avoid

engine problems when the engine is converted

back to 100 percent distillate diesel fuel.

Fuel for Cold Weather Operation

The European standard “EN590” contains climate

dependant requirements and a range of options. The

options can be applied differently in each country.

There are 5 classes that are given to arctic climates

and severe winter climates. 0, 1, 2, 3, and 4.

•  The compatibility of the elastomers with biodiesel

is being monitored. The condition of  seals and

hoses should be monitored regularly.

This document has been printed from SPI². Not for Resale


 

SEBU8337

49

Maintenance Section

Refill Capacities

Fuel that complies with “EN590 ” CLASS 4 can be

used at temperatures as low as −44 °C (−47.2 °F).

Refer to “EN590” for a  detailed discretion of the

physical properties of the fuel.

Perkins recognizes the fact  that additives may

be required in some special circumstances.  Fuel

additives need to be used  with caution. Contact

your fuel supplier for those  circumstances when

fuel additives are required. Your fuel supplier can

recommend the appropriate fuel additive and the

correct level of treatment.

The diesel fuel “ASTM D975 1-D” that is used in the

united states of america may be used in very cold

temperatures that are below −18 °C (−0.4 °F).

Note: For the best results, your fuel supplier should

treat the fuel when additives are required. The treated

fuel must meet the requirements that are stated in

table 14.

In extreme cold ambient conditions, you may also

use fuels that are listed in the table 16. These fuels

are intended to be used in temperatures that can be

as low as −54 °C (−65.2 °F).

Table 16

i03040140

Fluid Recommendations

Light Distillate  Fuels

Grade

(1)

Specification

“MIL-DTL-5624U”

“MIL-DTL-83133E”

“ASTM D1655”

JP-5

General Lubricant Information

JP-8

Jet-A-1

Because of government regulations regarding the

certification of exhaust emissions from the engine,

the lubricant recommendations must be followed.

(1)  The use of these fuels is acceptable with an appropriate fuel

additive and the fuels must meet minimum requirements that

are stated in Table 14. Fuel samples should  be analyzed for

the compliance. Fuels MUST NOT exceed 0.52 mm lubricity

wear scar diameter that is tested on a HFFR . The test must be

performed at 60 °C. Refer to “ISO 12156-1”. Fuels must have

minimum viscosity of 1.4 centistokes that is delivered to  the

fuel injection pump. Fuel cooling may be required in order to

maintain minimum viscosity of 1.4 centistokes that is delivered

to the fuel injection pump.

•  EMA____________Engine Manufacturers Association

•  API_____________________American Petroleum Institute

•  SAE___________________________________________Society Of

Automotive Engineers Inc.

Engine Manufacturers Association (EMA)

Oils

Mixing alcohol or gasoline with diesel fuel can pro-

duce an explosive mixture in the engine crankcase

or the fuel tank.  Alcohol or gasoline must not be

used in order to dilute diesel fuel. Failure to follow

this instruction may result in death or personal in-

jury.

The “Engine  Manufacturers Association

Recommended Guideline on Diesel Engine Oil” is

recognized by Perkins. For detailed  information

about this guideline, see the latest edition of EMA

publication, “EMA DHD -1”.

There are many other diesel fuel specifications that

are published by governments and by technological

societies. Usually, those specifications do not review

all the requirements that are addressed in table 14.

To ensure optimum engine performance, a complete

fuel analysis should be  obtained before engine

operation. The fuel analysis should include all of the

properties that are stated in the table 14.

API Oils

The Engine Oil Licensing and Certification System by

the American Petroleum Institute (API) is recognized

by Perkins. For detailed  information about this

system, see the latest edition of the “API publication

No. 1509”. Engine oils that bear the API symbol are

authorized by API.

Fuel Additive

Supplemental diesel fuel additives are not generally

recommended. This is due to potential damage to

the fuel system or the  engine. Your fuel supplier

or the fuel manufacturer will add  the appropriate

supplemental diesel fuel additives.

This document has been printed from SPI². Not for Resale


 

50

SEBU8337

Maintenance Section

Refill Capacities

In order to make the correct choice of a commercial

oil, refer to the following explanations:

EMA DHD-1  – The  Engine Manufacturers

Association (EMA) has  developed lubricant

recommendations as an alternative to the  API oil

classification system. DHD-1 is a Recommended

Guideline that defines a level of oil performance for

these types of diesel engines: high speed, four stroke

cycle, heavy-duty, and light duty. DHD-1 oils may

be used in Perkins engines when the following oils

are recommended: API CH-4, API CG-4, and API

CF-4. DHD-1 oils are intended to provide superior

performance in comparison to API CG-4 and  API

CF-4.

g00546535

Illustration 18

Typical API symbol

DHD-1 oils will meet the needs of high performance

Perkins diesel engines that are operating in many

applications. The tests and the test limits  that are

used to define DHD-1 are similar  to the new API

CH-4 classification. Therefore, these oils will also

meet the requirements for diesel engines that require

low emissions. DHD-1 oils are designed to control the

harmful effects of soot with improved wear resistance

and improved resistance to plugging of the oil filter.

These oils will also provide superior control of piston

deposit for engines with either two-piece steel pistons

or aluminum pistons.

Diesel engine oils CC,  CD, CD-2, and CE have

not been API authorized  classifications since 1

January 1996. Table 17 summarizes the status of

the classifications.

Table 17

API Classifications

Current

CH-4, ,  CI-4

-

Obsolete

CE, CC,  CD

CD-2  (1)

All DHD-1 oils must complete a  full test program

with the base stock and with the viscosity grade of

the finished commercial oil. The use of “API  Base

Oil Interchange Guidelines” are not appropriate for

DHD-1 oils. This feature reduces the  variation in

performance that can occur when base stocks are

changed in commercial oil formulations.

(1)  The oil CD-2 is for a two-cycle diesel engine. Perkins does not

sell engines that utilize CD-2 oil.

Terminology

Certain abbreviations follow the nomenclature of

“SAE J754”. Some classifications follow “SAE J183”

abbreviations, and some classifications follow the

“EMA Recommended Guideline on Diesel Engine

Oil”. In addition to Perkins definitions, there are other

definitions that will be of assistance in  purchasing

lubricants. Recommended oil viscosities can be found

in this publication, “Fluid Recommendations/Engine

Oil” topic (Maintenance Section).

DHD-1 oils are recommended for use in extended oil

change interval programs that optimize the life of the

oil. These oil change interval programs are based

on oil analysis. DHD-1 oils are recommended  for

conditions that demand a premium oil. Your Perkins

dealer or your Perkins distributor has the  specific

guidelines for optimizing oil change intervals.

API CH-4 – API CH-4 oils were developed in order to

meet the requirements of the new high performance

diesel engines. Also,  the oil was designed to

meet the requirements of the low emissions diesel

engines. API CH-4 oils are also acceptable for use

in older diesel engines and in diesel  engines that

use high sulfur diesel fuel. API CH-4  oils may be

used in Perkins engines that use API CG-4 and API

CF-4 oils. API CH-4 oils will generally exceed the

performance of API CG-4 oils in the following criteria:

deposits on pistons, control of oil consumption, wear

of piston rings, valve train wear, viscosity control,

and corrosion.

Engine Oil

Commercial Oils

The performance of commercial  diesel engine

oils is based  on American Petroleum Institute

(API) classifications. These API classifications are

developed in order to provide commercial lubricants

for a broad range of diesel engines that operate at

various conditions.

Only use commercial oils that meet the  following

classifications:

•  API CH-4 CI-4

This document has been printed from SPI². Not for Resale


 

SEBU8337

51

Maintenance Section

Refill Capacities

Three new engine tests were developed for the API

CH-4 oil. The first test specifically evaluates deposits

on pistons for engines with the two-piece steel piston.

This test (piston deposit) also measures the control

of oil consumption. A  second test is conducted

with moderate oil soot. The second test measures

the following criteria: wear of piston rings, wear of

cylinder liners, and resistance to corrosion. A third

new test measures the following characteristics with

high levels of soot in the oil: wear of the valve train,

resistance of the oil in  plugging the oil filter, and

control of sludge.

In addition to the new  tests, API CH-4 oils have

tougher limits for viscosity control in applications that

generate high soot. The oils  also have improved

oxidation resistance. API CH-4 oils must pass an

additional test (piston deposit) for engines that use

aluminum pistons (single piece). Oil performance is

also established for engines that operate in areas

with high sulfur diesel fuel.

g00799818

Illustration 19

(Y) TBN by “ASTM D2896”

(X) Percentage of fuel sulfur by weight

(1) TBN of new  oil

(2) Change the oil when the  TBN deteriorates to 50 percent of

the original TBN.

Use the following guidelines for fuel sulfur levels that

exceed 1.5 percent:

All of these improvements  allow the API CH-4

oil to achieve optimum oil  change intervals. API

CH-4 oils are recommended for use in extended oil

change intervals. API CH-4 oils are recommended

for conditions that demand  a premium oil. Your

Perkins dealer or your Perkins distributor has specific

guidelines for optimizing oil change intervals.

Choose an oil with the highest TBN that meets one

of these classifications: EMA DHD-1 and API CH-4.

Reduce the oil change  interval. Base the oil

change interval on the oil analysis. Ensure that the

oil analysis includes the condition of the oil and a

wear metal analysis.

Some commercial  oils that meet  the API

classifications may require reduced  oil change

intervals. To determine the oil change interval, closely

monitor the condition of the oil and perform a wear

metal analysis.

Excessive piston deposits can be produced by an oil

with a high TBN. These deposits can lead to a loss

of control of the oil consumption and to the polishing

of the cylinder bore.

NOTICE

Failure to follow these oil recommendations can cause

shortened engine service  life due to deposits  and/or

excessive wear.

NOTICE

Operating Direct Injection (DI) diesel engines with fuel

sulphur levels over 0.5 percent will require shortened

oil change intervals in order to help maintain adequate

wear protection.

Total Base Number (TBN) and Fuel Sulfur

Levels for Direct Injection (DI)  Diesel

Engines

Table 18

Percentage of Sulfur in

the fuel

Oil change interval

The Total Base Number (TBN) for an oil depends on

the fuel sulfur level. For direct injection engines that

use distillate fuel, the minimum TBN of the new oil

must be 10 times the fuel sulfur level.  The TBN is

defined by “ASTM D2896”. The minimum TBN of the

oil is 5 regardless of fuel sulfur level. Illustration 19

demonstrates the TBN.

Lower than 0.5

0.5 to 1.0

Normal

0.75 of normal

0.50 of normal

Greater than 1.0

Lubricant Viscosity Recommendations

for Direct Injection (DI) Diesel Engines

The correct SAE viscosity grade of oil is determined

by the minimum  ambient temperature during

cold engine start-up, and the  maximum ambient

temperature during engine operation.

This document has been printed from SPI². Not for Resale


 

52

SEBU8337

Maintenance Section

Refill Capacities

Refer to Table 19 (minimum temperature) in order

to determine the required oil viscosity for starting a

cold engine.

Re-refined Base Stock Oils

Re-refined base stock  oils are accept, able for

use in Perkins  engines if these oils  meet the

performance requirements that are specified  by

Perkins. Re-refined base stock oils  can be used

exclusively in finished oil or in a combination  with

new base stock oils. The US military specifications

and the specifications of other  heavy equipment

manufacturers also allow the use of re-refined base

stock oils that meet the same criteria.

Refer to Table 19 (maximum temperature) in order

to select the oil viscosity for engine operation at the

highest ambient temperature that is anticipated.

Generally, use the highest  oil viscosity that is

available to meet the requirement for the temperature

at start-up.

Table 19

The process that is used to make re-refined  base

stock oil should adequately remove all wear metals

that are in the used  oil and all the additives that

are in the used  oil. The process that is used to

make re-refined base stock oil generally involves the

process of vacuum distillation and hydrotreating the

used oil. Filtering is adequate for the production of

high quality, re-refined base stock oil.

Engine Oil  Viscosity

EMA LRG-1

API CH-4

Viscosity Grade

Ambient Temperature

Minimum

Maximum

SAE 0W20

SAE 0W30

SAE 0W40

SAE 5W30

SAE 5W40

SAE 10W30

SAE 15W40

−40 °C (−40 °F)

−40 °C (−40 °F)

−40 °C (−40 °F)

−30 °C (−22 °F)

−30 °C (−22 °F)

−20 °C (−4 °F)

−10 °C (14 °F)

10 °C (50 °F)

30 °C (86 °F)

40 °C (104 °F)

30 °C (86 °F)

40 °C (104 °F)

40 °C (104 °F)

50 °C (122 °F)

Lubricants for Cold Weather

When an engine is started and an engine is operated

in ambient temperatures below −20 °C (−4 °F), use

multigrade oils that are capable  of flowing in low

temperatures.

These oils have lubricant viscosity grades of SAE

0W or SAE 5W.

Synthetic Base Stock Oils

When an engine is started and operated in ambient

temperatures below −30 °C (−22 °F), use a synthetic

base stock multigrade oil with an 0W viscosity grade

or with a 5W viscosity grade. Use an oil with a pour

point that is lower than −50 °C (−58 °F).

Synthetic base oils  are acceptable for use in

these engines if these oils meet the  performance

requirements that are specified for the engine.

Synthetic base oils generally perform better  than

conventional oils in the following two areas:

The number of acceptable lubricants is  limited in

cold weather conditions. Perkins recommends the

following lubricants for use in cold weather conditions:

•  Synthetic base oils have improved  flow at low

temperatures especially in arctic conditions.

First Choice  – Use oil  with an EMA DHD-1

Recommended Guideline. Use a CH-4 oil that has

an API license. The oil should be either SAE 0W20,

SAE 0W30, SAE 0W40, SAE 5W30, or SAE 5W40

lubricant viscosity grade.

•  Synthetic base oils have  improved oxidation

stability especially at high operating temperatures.

Some synthetic base  oils have performance

characteristics that enhance the service life of the

oil. Perkins does not  recommend the automatic

extending of the oil change intervals for any type of

oil.

Second Choice  – Use an oil that  has a CH-4

additive package. Although the oil  has not been

tested for the requirements of the API license, the oil

must be either SAE 0W20, SAE 0W30, SAE 0W40,

SAE 5W30, or SAE 5W40.

NOTICE

Shortened engine  service life  could result if  second

choice oils are used.

This document has been printed from SPI². Not for Resale


 

SEBU8337

53

Maintenance Section

Refill Capacities

Aftermarket Oil Additives

•  Tests are  conducted in order  to detect

contamination of the oil by water, glycol or fuel.

Perkins does not recommend the use of aftermarket

additives in oil. It is not necessary to use aftermarket

additives in order to achieve the engine’s maximum

service life or rated performance. Fully formulated,

finished oils consist of base oils and of commercial

additive packages. These additive packages are

blended into the base oils at precise percentages in

order to help provide finished oils with performance

characteristics that meet industry standards.

•  The Oil Condition Analysis determines the loss of

the oil’s lubricating properties. An infrared analysis

is used to compare the properties of new oil to the

properties of the used oil sample. This analysis

allows technicians to determine the amount  of

deterioration of the oil during use. This analysis

also allows technicians to verify the performance

of the oil according to the specification during the

entire oil change interval.

There are no industry standard tests that evaluate

the performance or the compatibility of aftermarket

additives in finished oil. Aftermarket additives may

not be compatible with the  finished oil’s additive

package, which could lower the performance of the

finished oil. The aftermarket additive could  fail to

mix with the finished oil. This could produce sludge

in the crankcase. Perkins discourages the  use of

aftermarket additives in finished oils.

To achieve the best performance  from a Perkins

engine, conform to the following guidelines:

•  Select the correct oil, or a commercial oil that meets

the “EMA Recommended Guideline on  Diesel

Engine Oil” or the recommended API classification.

•  See the appropriate “Lubricant Viscosities” table in

order to find the correct oil viscosity grade for your

engine.

•  At the specified interval, service the engine. Use

new oil and install a new oil filter.

•  Perform maintenance at the  intervals that are

specified in the  Operation and Maintenance

Manual, “Maintenance Interval Schedule”.

Oil analysis

Some engines may be equipped with an oil sampling

valve. If oil analysis is required the oil sampling valve

is used to obtain samples of the engine oil. The oil

analysis will complement the preventive maintenance

program.

The oil analysis is a diagnostic tool that is used to

determine oil performance and component wear

rates. Contamination can be identified and measured

through the use of the oil analysis. The oil analysis

includes the following tests:

•  The Wear Rate Analysis monitors the wear of the

engine’s metals. The amount of wear metal and

type of wear metal that is in the oil is analyzed. The

increase in the rate of engine wear metal  in the

oil is as important as the quantity of engine wear

metal in the oil.

This document has been printed from SPI². Not for Resale


 

54

SEBU8337

Maintenance Section

Maintenance Interval Schedule

i02784638

Every 2000 Service Hours

Maintenance Interval Schedule

Alternator - Inspect ...............................................  55

Water Pump - Inspect ...........................................  81

Every 3000 Service Hours or 2 Years

When Required

Cooling System Water Temperature Regulator  -

Replace ............................................................... 60

Crankshaft Vibration Damper - Inspect ................. 61

Engine Protective Devices - Check ......................  70

Engine Speed/Timing Sensors -  Check/Clean/

Calibrate .............................................................. 70

Turbocharger - Inspect .......................................... 79

Battery - Replace .................................................. 55

Battery or Battery Cable - Disconnect ..................  56

Engine - Clean ...................................................... 62

Engine Oil Sample - Obtain ..................................  67

Fuel System - Prime .............................................  71

Severe Service Application - Check .....................  78

Daily

Every 5000 Service Hours

Cooling System Coolant Level - Check ................  60

Driven Equipment - Check .................................... 61

Engine Air Cleaner Service Indicator - Inspect ..... 64

Engine Oil Level - Check ......................................  66

Fuel System Primary  Filter/Water Separator -

Starting Motor - Inspect ........................................  79

Every 6000 Service Hours

Overhaul Considerations ......................................  77

Drain ...................................................................  72

Walk-Around Inspection ........................................ 80

Every 6000 Service Hours or 3 Years

Cooling System Coolant (ELC) - Change ............. 58

Every Week

Every 12 000 Service Hours or 6 Years

Jacket Water Heater - Check ................................ 77

Overhaul Considerations ......................................  77

Every 250 Service Hours or 1 Year

Battery Electrolyte Level - Check .......................... 56

Fuel Tank Water and Sediment - Drain ................. 76

Initial 500 Service Hours

Engine Valve Lash - Inspect/Adjust ......................  71

Every 500 Service Hours

Belts - Inspect/Adjust/Replace .............................. 57

Engine Valve Lash - Inspect/Adjust ......................  71

Every 500 Service Hours or 1 Year

Aftercooler Core - Clean/Test ...............................  55

Engine Air Cleaner Element  (Single Element) -

Inspect/Replace ..................................................  62

Engine Crankcase Breather - Replace .................  64

Engine Mounts - Inspect ....................................... 66

Engine Oil and Filter - Change .............................  68

Fan Drive Bearing - Lubricate ............................... 71

Fuel System Primary  Filter (Water Separator)

Element - Replace ..............................................  73

Fuel System Secondary Filter - Replace .............. 74

Hoses and Clamps - Inspect/Replace ..................  76

Radiator - Clean .................................................... 78

Every 1000 Service Hours or 1 Year

Electronic Unit Injector - Inspect/Adjust ................ 61

This document has been printed from SPI². Not for Resale


 

SEBU8337

55

Maintenance Section

Aftercooler Core - Clean/Test

i02578388

i02322311

Aftercooler Core - Clean/Test

(Air-To-Air Aftercooler)

Alternator - Inspect

Perkins recommends a scheduled inspection  of

the alternator. Inspect  the alternator for loose

connections and correct battery charging. Check the

ammeter (if equipped) during engine operation in

order to ensure correct battery performance and/or

correct performance of the electrical system. Make

repairs, as required.

Note: Adjust the frequency of cleaning according to

the effects of the operating environment.

Inspect the cooling air side of the aftercooler for these

items: damaged fins, corrosion, dirt, grease, insects,

leaves, oil, and other debris. Clean the cooling air

side of the aftercooler, if necessary.

Check the alternator and the  battery charger for

correct operation. If the  batteries are correctly

charged, the ammeter reading should be very near

zero. All batteries should  be kept charged. The

batteries should be kept warm because temperature

affects the cranking power. If the battery is too cold,

the battery will not  crank the engine. When the

engine is not run for long periods of  time or if the

engine is run for short periods, the batteries may not

fully charge. A battery with a low charge will freeze

more easily than a battery with a full charge.

For air-to-air aftercoolers, use the same methods that

are used for cleaning the outside of radiators.

Personal injury can result from air pressure.

Personal injury can result without following prop-

er procedure. When using pressure air, wear a pro-

tective face shield and protective clothing.

i01878164

Maximum air pressure at the nozzle must be less

than 205 kPa (30 psi) for cleaning purposes.

Battery - Replace

Pressurized air is the preferred method for removing

loose debris. Hold the nozzle approximately 6 mm

(0.25 inch) away from the fins. Slowly move the air

nozzle in a direction that is parallel with the tubes.

This will remove debris that is between the tubes.

Batteries give  off combustible  gases  which can

explode. A spark can cause the combustible gas-

es to ignite. This can result in severe personal in-

jury or death.

Pressurized water may also be used for cleaning.

The maximum water pressure for cleaning purposes

must be less than 275 kPa (40 psi). Use pressurized

water in order to soften mud.

Ensure proper ventilation for batteries that are  in

an enclosure. Follow the proper procedures in or-

der to help  prevent electrical arcs  and/or sparks

near batteries. Do  not smoke when  batteries are

serviced.

Use a degreaser and steam for removal of oil and

grease. Wash the core with detergent and hot water.

Thoroughly rinse the core with clean water.

After cleaning, start the engine. Run the engine for

two minutes. This will help in the removal of debris

and drying of the core.  Stop the engine. Inspect

the core for cleanliness.  Repeat the cleaning, if

necessary.

The battery cables or the batteries  should not be

removed with the battery cover in place. The bat-

tery cover should be  removed before any servic-

ing is attempted.

Inspect the fins for damage. Bent fins may be opened

with a “comb”.

Removing the battery cables or the batteries with

the cover in place may cause a battery explosion

resulting in personal injury.

Inspect these items for  good condition: welds,

mounting brackets, air lines, connections, clamps,

and seals. Make repairs, if necessary.

1.  Switch the engine to the OFF position. Remove

all electrical loads.

This document has been printed from SPI². Not for Resale


 

56

SEBU8337

Maintenance Section

Battery Electrolyte Level - Check

2.  Turn off any battery chargers. Disconnect any

battery chargers.

2.  Check the condition of the electrolyte  with a

suitable battery tester.

3.  Install the caps.

3.  The NEGATIVE “-” cable connects the NEGATIVE

“-” battery terminal to the NEGATIVE “-” terminal

on the starter motor. Disconnect the cable from

the NEGATIVE “-” battery terminal.

4.  Keep the batteries clean.

Clean the battery case with one of the following

cleaning solutions:

4.  The POSITIVE “+” cable connects the POSITIVE

“+” battery terminal to the POSITIVE “+” terminal

on the starting motor. Disconnect the cable from

the POSITIVE “+” battery terminal.

•  A mixture of 0.1 kg (0.2 lb) of washing soda or

baking soda and 1 L (1 qt) of clean water

Note: Always recycle a battery.  Never discard a

battery. Return used batteries to  an appropriate

recycling facility.

•  A mixture of 0.1 L (0.11 qt) of ammonia and 1 L

(1 qt) of clean water

Thoroughly rinse the battery case with clean water.

5.  Remove the used battery.

6.  Install the new battery.

Use a fine  grade of sandpaper to clean the

terminals and the cable clamps. Clean the items

until the surfaces are bright or shiny.  DO NOT

remove material excessively. Excessive removal

of material can cause the clamps to not fit properly.

Coat the clamps and the terminals with a suitable

petroleum jelly.

Note: Before the cables are connected, ensure that

the engine start switch is OFF.

7.  Connect the cable from the starting motor to the

POSITIVE “+” battery terminal.

8.  Connect the cable from the NEGATIVE “-” terminal

on the starter motor to the NEGATIVE “-” battery

terminal.

i02857256

Battery or Battery  Cable -

Disconnect

i02563861

Battery Electrolyte Level  -

Check

The battery cables or the batteries  should not be

removed with the battery cover in place. The bat-

tery cover should be  removed before any servic-

ing is attempted.

When the engine is not run for long periods of time or

when the engine is run for short periods, the batteries

may not fully recharge. Ensure a full charge in order

to help prevent the battery from freezing. If batteries

are correctly charged, the ammeter reading should

be very near zero, when the engine is in operation.

Removing the battery cables or the batteries with

the cover in place may cause a battery explosion

resulting in personal injury.

1.  Turn the start switch to the OFF position. Turn the

ignition switch (if equipped) to the OFF position

and remove the key and all electrical loads.

All lead-acid batteries contain sulfuric acid which

can burn the skin and clothing. Always wear a face

shield and protective clothing when working on or

near batteries.

2.  Turnoff any battery chargers. Disconnect any

battery chargers.

3.  Disconnect the negative battery terminal at the

battery that goes to the start switch. Ensure that

the cable cannot contact the terminal. When four

12 volt batteries are involved, the negative side of

two batteries must be disconnected.

1.  Remove the filler caps. Maintain the electrolyte

level to the “FULL” mark on the battery.

If the addition of water is necessary, use distilled

water. If distilled water is not available use clean

water that is low in minerals. Do not use artificially

softened water.

4.  Tape the leads in order to help prevent accidental

starting.

This document has been printed from SPI². Not for Resale


 

SEBU8337

57

Maintenance Section

Belts - Inspect/Adjust/Replace

5.  Proceed with necessary system repairs. Reverse

the steps in order to reconnect all of the cables.

Alternator Belt Adjustment

i02784753

Belts - Inspect/Adjust/Replace

Inspection

Inspect the alternator belt and the fan drive belts for

wear and for cracking. Replace the belts if the belts

are not in good condition.

Check the belt tension according to the information

in Systems Operation, Testing and Adjusting, “Belt

Tension Chart”.

Slippage of loose belts can reduce  the efficiency

of the driven components. Vibration of loose belts

can cause unnecessary wear  on the following

components:

•  Belts

•  Pulleys

•  Bearings

If the belts are too tight, unnecessary stress is placed

on the components. This reduces the service life of

the components.

Replacement

g01391209

Illustration 20

For applications that require multiple  drive belts,

replace the drive belts in matched sets. Replacing

one drive belt of a matched set will cause the new

drive belt to carry more load because the older drive

belts are stretched. The additional load on the new

drive belt could cause the new drive belt to fail.

1.  Remove the belt guard.

2.  Loosen alternator pivot bolt (2) .

3.  Loosen the setscrew for the adjustment link (1).

4.  Move the assembly in  order to increase or

decrease the belt tension.  Refer to Systems

Operation, Testing and Adjusting, “Belt Tension

Chart”.

5.  Tighten the setscrew for the adjustment link (1)

securely. Tighten alternator pivot bolt (2) securely.

6.  Reinstall the belt guard.

If new alternator belts are installed,  check the

tension of the alternator  belt again after 10

minutes of engine operation at the rated rpm.

7.  Remove the belt guard and check the belt tension.

When the correct belt tension is obtained, fit the

belt guard.

This document has been printed from SPI². Not for Resale


 

58

SEBU8337

Maintenance Section

Cooling System Coolant (ELC) - Change

Adjustment of the Fan Drive Belt

i02579635

Cooling System Coolant (ELC)

- Change

NOTICE

Care must be taken to ensure that fluids are contained

during performance of inspection, maintenance, test-

ing, adjusting and repair of the product. Be prepared to

collect the fluid with suitable containers before open-

ing any  compartment or  disassembling any  compo-

nent containing fluids.

Dispose of all fluids according to Local regulations and

mandates.

NOTICE

Keep all parts clean from contaminants.

Contaminants may cause  rapid wear and  shortened

component life.

Clean the cooling system  and flush the cooling

system before the recommended  maintenance

interval if the following conditions exist:

g01402065

Illustration 21

•  The engine overheats frequently.

•  Foaming of the coolant is observed.

1.  Remove the belt guard.

2.  Loosen the large locknut  (3) and turn the

adjustment screw (4) until the correct belt tension

is obtained.

•  The oil has entered the cooling system  and the

coolant is contaminated.

•  The fuel has entered the cooling system and the

coolant is contaminated.

3.  Tighten the large locknut (3) securely and recheck

the belt tension.

Note: When the cooling system  is cleaned, only

clean water is needed when the ELC is drained and

replaced.

4.  If the belt tension is correct, loosen the adjustment

screw (3) in order to release the tension.

5.  Reinstall the belt guard.

Note: Inspect the  water pump and the water

temperature regulator after the cooling system has

been drained. This is a good opportunity to replace

the water pump, the water temperature regulator and

the hoses, if necessary.

If new alternator belts are installed,  check the

tension of the  alternator belt again after 10

minutes of engine operation at the rated rpm.

6.  Remove the belt guard and check the belt tension.

When the correct belt tension is obtained, fit the

belt guard.

Drain

Pressurized System: Hot coolant  can cause seri-

ous burns. To open the cooling system filler  cap,

stop the engine and wait until the cooling system

components are cool. Loosen the cooling system

pressure cap slowly  in order to  relieve the pres-

sure.

This document has been printed from SPI². Not for Resale


 

SEBU8337

59

Maintenance Section

Cooling System Coolant (ELC) - Change

1.  Stop the engine and allow the engine to  cool.

Loosen the cooling system filler  cap slowly in

order to relieve any pressure. Remove the cooling

system filler cap.

NOTICE

Do  not   fill  the   cooling   system  faster   than  5   L

(1.3 US gal) per minute to avoid air locks.

2.  Open the drain cock or remove the drain plug on

the radiator.

Cooling system air locks may result in engine damage.

2.  Fill the cooling system  with Extended Life

Coolant (ELC). Refer  to the Operation and

Maintenance Manual, “Fluid Recommendations”

topic (Maintenance Section) for more information

on cooling system specifications. Do not install the

cooling system filler cap.

Allow the coolant to drain.

NOTICE

Dispose of  used engine  coolant or  recycle. Various

methods have been proposed to reclaim used coolant

for reuse in engine cooling systems. The full distillation

procedure is the only method acceptable by Perkins to

reclaim the coolant.

3.  Start and run the engine for one minute in order

to purge the air from the cavities  of the engine

block. Stop the engine.

For information regarding the  disposal and the

recycling of used coolant, consult your Perkins dealer

or your Perkins distributor.

4.  Check the coolant level. Maintain the coolant

level within 13 mm (0.5 inch) below the bottom

of the pipe for filling. If necessary, repeat step 3.

Maintain the coolant level in the expansion bottle

(if equipped) at the correct level.

Flush

1.  Flush the cooling system with clean water in order

to remove any debris.

2.  Close the drain cock or install the drain plug on

the radiator.

NOTICE

Do  not   fill  the   cooling  system   faster  than   5  L

(1.3 US gal) per minute to avoid air locks.

Cooling system air locks may result in engine damage.

3.  Fill the cooling system with clean water. Install the

cooling system filler cap.

g00103639

Illustration 22

4.  Start and run  the engine until the  water

temperature regulator opens and the fluid levels

decreases in the header tank.

Filler cap

5.  Clean the cooling system filler cap and inspect the

gasket. If the gasket is damaged, discard the old

filler cap and install a new filler cap. If the gasket

is not damaged, use a suitable pressurizing pump

in order to pressure test the filler cap. The correct

pressure is stamped on the face of the filler cap. If

the filler cap does not retain the correct pressure,

install a new filler cap.

5.  Stop the engine and allow the engine to  cool.

Loosen the cooling system filler  cap slowly in

order to relieve any pressure. Remove the cooling

system filler cap. Open the drain cock or remove

the drain plug on the radiator. Allow the water to

drain. Flush the cooling system with clean water.

6.  Start the engine. Inspect the cooling system for

leaks and for correct operating temperature.

Fill

1.  Close the drain cock or install the drain plug on

the radiator.

This document has been printed from SPI². Not for Resale


 

60

SEBU8337

Maintenance Section

Cooling System Coolant Level - Check

i01197583

3.  Clean the cooling system filler cap and check the

condition of the filler cap gaskets. Replace  the

cooling system filler cap if the filler cap gaskets are

damaged. Reinstall the cooling system filler cap.

Cooling System Coolant Level

- Check

4.  Inspect the cooling system for leaks.

Check the coolant level when the engine is stopped

and cool.

i02573904

Cooling System  Water

Temperature Regulator  -

Replace

Replace the water temperature regulator  before

the water temperature regulator  fails. This is a

recommended preventive maintenance practice.

Replacing the water temperature regulator reduces

the chances for unscheduled downtime.

A water temperature  regulator that fails in  a

partially opened position can cause overheating or

overcooling of the engine.

g00285520

Illustration 23

Cooling system filler cap

A water temperature regulator that fails in the closed

position can cause excessive overheating. Excessive

overheating could result in cracking of the cylinder

head or piston seizure problems.

Pressurized System: Hot coolant  can cause seri-

ous burns. To open the cooling system filler  cap,

stop the engine and wait until the cooling system

components are cool. Loosen the cooling system

pressure cap slowly  in order to  relieve the pres-

sure.

A water temperature regulator that fails in the open

position will cause the engine operating temperature

to be too low during  partial load operation. Low

engine operating temperatures during partial loads

could cause an excessive carbon buildup inside the

cylinders. This excessive carbon buildup could result

in an accelerated wear of the piston rings and wear

of the cylinder liner.

1.  Remove the cooling system filler cap slowly in

order to relieve pressure.

2.  Maintain the coolant level within 13 mm (0.5 inch)

of the bottom of the filler  pipe. If the engine is

equipped with a sight glass, maintain the coolant

level to the proper level in the sight glass.

Refer to Disassembly  and Assembly, “Water

Temperature Regulator Housing -  Remove and

Install” for the replacement procedure of the water

temperature regulator, or consult  your Perkins

distributor.

Note: If only the water temperature regulators are

replaced, drain the coolant from the cooling system to

a level that is below the water temperature regulator

housing.

g00103639

Illustration 24

Typical filler cap gaskets

This document has been printed from SPI². Not for Resale


 

SEBU8337

61

Maintenance Section

Crankshaft Vibration Damper - Inspect

i02573905

i02151646

Crankshaft Vibration Damper

- Inspect

Driven Equipment - Check

Refer to the OEM specifications for more information

on the following maintenance recommendations for

the driven equipment:

Damage to the crankshaft vibration damper or failure

of the crankshaft vibration damper can  increase

torsional vibrations. This can result in damage  to

the crankshaft and to other engine components. A

damper that is damaged can cause excessive gear

train noise at variable points in the speed range.

•  Inspection

•  Adjustment

•  Lubrication

The damper is mounted to the crankshaft which is

located behind the belt guard on  the front of the

engine.

•  Other maintenance recommendations

Perform any maintenance for the driven equipment

which is recommended by the OEM.

Visconic Damper

The visconic damper has a weight that is  located

inside a fluid filled case. The weight moves in  the

case in order to limit torsional vibration.

i02784833

Electronic Unit  Injector -

Inspect/Adjust

Inspect the damper for evidence  of fluid leaks. If

a fluid leak is found,  determine the type of fluid.

The fluid in the damper is silicone. Silicone has the

following characteristics: transparent, viscous, and

smooth.

  

  

If the fluid leak is oil, inspect the crankshaft seals for

leaks. If a leak is observed, replace the crankshaft

seals.

Be sure  the engine  cannot be started  while this

maintenance is being performed. To prevent pos-

sible injury, do not use the  starting motor to turn

the flywheel.

Inspect the damper and repair or replace the damper

for any of the following reasons:

Hot engine  components can cause  burns. Allow

additional time for the engine to cool before mea-

suring/adjusting the unit injectors.

•  The damper is dented, cracked, or leaking.

•  The paint on the damper is discolored from heat.

The electronic unit injectors use high voltage. Dis-

connect the unit injector enable circuit connector

in order to  prevent personal injury. Do  not come

in contact with the injector terminals while the en-

gine is running.

•  The engine has had a failure because of a broken

crankshaft.

•  Analysis of the oil has revealed that the front main

bearing is badly worn.

•  There is a large amount of gear train wear that is

not caused by a lack of oil.

The operation of Perkins engines  with improper

adjustments of the electronic unit injector can reduce

engine efficiency. This reduced efficiency could result

in excessive fuel usage and/or shortened engine

component life.

•  The temperature of the damper fluid is too high.

Refer to the Service Manual or consult your Perkins

distributor for information about damper replacement.

Only qualified service personnel should  perform

this maintenance. Refer to  the following topics

for your engine for the  correct procedure: Refer

to the Systems Operation, Testing and Adjusting,

“Electronic Unit Injector - Test” for the test procedure,

and Systems Operation, Testing and  Adjusting,

“Electronic Unit Injector - Adjust”  for the correct

procedure for adjusting the injectors.

This document has been printed from SPI². Not for Resale


 

免費(fèi)熱線
400-082-9096?
整機(jī)銷售
0731-84424871? 18374999699
售后維修
0731-84424872? 15580888444
配件銷售
0731-84424873? 18274802060
手機(jī)端
微信公眾號(hào)
差差差很疼视频无掩盖无软件| 日韩中文字幕无码电影| 国产素人一区二区三区无码视频| 欧美精品亚洲精品日韩专区亚洲a 亚洲AV永久无码精品无码麻豆 | 免费观看国产短视频的方法| 亚洲欧洲国产综合av| 我是爸爸的女人中字头| 国产免费永久观看| 亚洲视频一区中文字幕| 亚洲欧美生福利免费生活片| 五月六月婷婷国产在线| 免费的欧美性爱小视频| 精精国产XXXX在线视频www| 一区二区一级黄片| 91人人妻人人澡人人爽国| 男女爽爽视频一区二区三| 自拍另类图片区亚洲| 国产真实乱免费高清视频| 99精品丰满人妻无码视频A片| 日本在线免费播放| 国产午夜福利红一片| 国产成人+亚洲+欧洲在线| 亚洲精品卡一卡2卡3卡4卡| 18禁精品一区二区三区| 国产一区二区美女主播| 中文字幕人妻色偷偷| 精品久久久中文字幕二区| 国产免费黄色精品网址| 无码人妻视频| 91日韩无码免费看| 另类欧美视频| 欧美亚洲日韩色图| 91色伦在线视频色女| 91精品国产综合久久麻豆| 国产欧美精品一区二区小说| 久久er20热在这里只有精品| 国产av毛片久久| 欧美激情视频一区二区不卡国产| 国产精品乱子伦一区二区好看到停不下来!| 亚洲国产日产久久高清欧美一区WW | 羞羞视频免费网站| 国产99综合精品私密视频| 国产重口另类极限扩张视频| 欧洲精品免费精品aa片在线播放| 久久精品国产一区二区涩涩| 日韩精品特黄一级片在线观看妓女网香蕉视频 | 日韩一级av在线免费观看| 欧美高清一区二区欧美| aaa成人永久在线观看视频| 黄色成人影院亚洲欧美a| 国产黄桃AV一区在线观看| 淑女人妻中文字幕| 亚洲欧美另类在线图片区| 性爱视频网站| 國內精品視頻一區二區三區 | 欧美日韩三在线中文字幕| 2020中文一卡二卡| 91久久综合九色综合欧美98| 亚洲日本欧洲欧美视频| 亚洲日韩?v中文字幕无码 | 亚洲激情一二三四入口少妇| av三级毛片免费看| japanesehd国产在线看无码| 人妻少妇一区二区三区| 日韩中文字幕无码电影| 麻豆十国产十又黄十祼体视频| 性69视频一区二区三区| 国产?片免费线观看| 999热视频在线观看| 姬小满狂飙乳液奖励自己| 国产色网三级网站| 国产aⅤ久久免费精品| 成人网站亚洲二区乱码| 国产色网三级网站| 亚洲天堂一区二区av| 国产免费黄色精品网址| 婷婷大色网红桃在线红桃| 天堂成人一区二区视频在线观看 | 久久大香萑太香蕉综合网| 国产成人无码AⅤ片在线图| 人妻无码不卡免费视频| 欧美成人vr在线高清精品| 色999日韩啪啪日韩| 视频一区二区三区在线| 私密粉嫩多久做一下| 亚洲日韩欧美有码在线| 亚洲午夜精品区午夜亚洲 | 国产专区手机在线视频| 國產99久久亞洲綜合精品| 亚洲欧美在线另类| 自慰免费精品国自产拍网站| 宝贝~你里面好紧我好爽视频| 亚洲一级夜夜爽| 国产亚洲av无码精品之毛片| 亚洲欧美日韩精品区| 不卡精品一区二区三区在线观看| 欧美精品亚洲日韩| 亚洲女人天堂色在线7777| 下载操逼视频| 天天爽夜夜爽夜夜爽精品视频破外| 性色av成人精品久久| 国产精品深田咏美一区二区| 亚洲av网站中文在线| 久久久免费观看| 久亚洲AV日韩Aⅴ无码久久| 潮喷大喷水系列无码精品视频| 久久综合久久一个色综合| 日本欧美内射在线观看| 乱伦免费高清自拍| 精品国产亚洲国拍| 欧美 日韩 国产一产| 全国三级片免费| 日韩在线视频欧美一区| 亚洲午夜av影视| 国产尤物无码无毒不卡| 天堂久久天堂av色综合}| 国产伦精品一区二区三区视频你| 最新AV先锋网址| av中文中字在线| 精品国产高清Av自产拍在线| 不卡精品一区二区三区在线观看| 欧洲亚洲无码一区二区| 污污网站在线观看视频| 精品久久亚洲av无码中文| 国产免费不卡一区在线视频| 麻豆精品秘 国产传媒AV消防| 日韩国产毛片一区二区三区| 日韩天堂mv在线播放| 亚洲精品久久AV无码一区二区| 日韩欧美精品有码在线观看 | 亚洲精品欧美精典在线观看| 精品国产免费Av无码久久久| 日本按摩高潮a级中文版视频| 91在线国产剧情路线| 男男国产久热精品无码激情| 国产啪视频免费观看| 国产精品一区二区VA内射| 欧美黄精品在线观看| 国产精品亚洲美女久久久| aaa成人永久在线观看视频| 精品久久久久久中文字幕无码一本 | 激情在线欧美91| 国产av一区二区影院cao| 国产精品成人欧美性做久久久 | 国产综合亚洲欧美日韩一区| 男女啪啪视频一区二区三区| 欧美午夜成年片在线观看| 午夜av福利在线播放| 免费看一级黄色片| 精品國產福利一區二區| 欧美一区二区三区久久妇| 精品國產福利一區二區| 在线观看自拍网站| 国产农村露脸无码精品视频| 国产日韩亚洲精美视频| 青青热久免费精品视频精品| 狂野欧美尤物视频在线观看| 99丁香久久中文缴情| 天堂视频一区二区免费在线观看 | 作爱视频在线观看无码| 国产性大战久久久| 插粗爽在线观看| 色欲av永久无码一区二区| 久久国产精品一区不卡福利伊人| 在线观看黄色视频的网站| 国产av日韩精品一区二区| 午夜免費觀看| 999热视频在线观看| 阿公抱着我的猛进苏蜜视频| 久久国产精品一区不卡福利伊人 | 青草热久精品视频在线观看| 国产精品人成在线观看gogo| 欧美另类调教一级二区中文字幕乱码| 国产亚洲精品首页| 自拍偷拍综合一区| 亚洲欧美成人午夜一区二区| 欧美亚洲变态另类激情| 美美女高清毛片免费播放| 精品国产亚洲国拍| 888米奇四色狠狠| 国产福利精品导航网址| av在线精品一区二区观看日韩| 午夜免費觀看| 无码人妻熟妇AV又粗又大A片| 日韩欧美一区二区久久| 中文字幕日韩不卡无码免费看| 日韩欧美在线观看17p| 国产免费永久黄色国产一级| 91嫖妓国内站街老熟女| 好男人资源网在线影院| 日韩视频在线播放一区二区三区| 欧美成人福利| 久久老男人一级视频| gogogo在线观看免费观看完整版高清| 超碰人妻免费福利| 欧洲亚洲国产岛国婷婷五情天av网 | 国产精品青草久久福利不卡探花| 国产欧美自拍亚洲激情111| 欧美综合自拍日本| 无码乱人伦中文视频| 国产人妻性生交大片一级直播| 亚洲精品视频成人| 91次元安装testflight破解版| 强奷表妺电影bd高清云播| 国产免费黄色精品网址| 国产综合在线播放| 老王轻一点儿好爽在深一点| 国产一本一道久久香蕉| 国产丝袜视频一区二区三区大长腿| 亚洲 欧美 综合一区| 2020国产激情在线视频| 高清国产一区二区在线观看| 免费播放国产性色生活片| 再灬再灬再灬深一点舒服视频 | 国产三级在线观看播放视频一| 色哟哟在线网站观看| 嗯灬啊灬把腿张开灬所有漫画| 国产乱理论片在线观看理论| AV无码久久无遮挡国产麻豆软件| 精品囯内在线观看| 欧美粗长硬大在线视频免费| 在线观看自拍网站| 深田咏美全部中文在线| 久国产av一区二区| japanesehd日本乱厨房| 日韩亚洲制服丝袜中文字幕 | 国模叶桐尿喷337p人体| 久久夜色国产av| 黑人巨大的吊bdsm| 一道本在线国产中文无码 | 四虎8848精品成人免费网站| 国产自啪精品视频网站丝袜| 亚洲色大18成人网站WWW在线播放| 成年无码AV动漫全部免费| 精品农村av毛片一区二区三区 | 妺妺窩人體色WWW在線下載| 草莓视频在线看免费高清观看| 亚洲日韩欧美有码在线 | 成人无码www免费视频在线播放| 欧美国产一区二区三区在线看| 99re热免费精品视频观看导航| 精精国产XXXX在线视频www| 黄色一级成人免费| 2023中文字幕在线观看| 小草在线视频亚洲无码| a级毛片无码真人版| 特黄片无码手机在线视频免费在线观看视频 | 国产日韩欧美一级视频片| 女性自慰喷潮久久免费观看| 欧洲亚洲无码电影| 丁香五月婷婷五月激情综合| 国产不卡一区二区三区被窝里| 欧美老肥妇bbwbbwbbwpics| 国内精品乱码久久久久伊人aⅴ| 最新中文字幕äV无码不卡| 人妻97日韩精品中文字幕| 国产泄欲在线观看| 91精品国产自产精品在线| 日本成本人A片www| 亚洲五区在线| 亚洲无码一卡二卡| 另类AV无码亚欧久久| 国产精品乱人无码伦av在线a| 日韩精品一区二区二区三区| 久久国产精品亚洲国产亚洲国产| 亚洲97一二三区| 日本在线免费播放| 99久久婷婷國產一區二區| av中文中字在线| 午夜国产手机在线观看| 被各种姿势c到高潮高h| 国产精品福利2020久久| 老王轻一点儿好爽在深一点| 国产偷自视频一区二区三区av | 极品美女毛片久久| 久久综合色天堂av| 亚洲精品一木道AV日韩国产| 成a人片在线观看久国产| 一本久道AV无码专区加勒比| 日本性色精品一区二区| 国产精品久人妻精品| 亚洲AV秘 无码在线| 97人人看碰人免费公开视频| 亚洲女人天堂色在线7777| 国产成人av国语在线| 亚洲国产成人精品女人久久成人18免费网站| 国产一级一级A一级A级| 国产农村老妇视频久久| 国产91免费观看在线直播| 小草在线视频亚洲无码| 国产一本一道久久香蕉| 午夜成人国产精品影视| 2021天堂无码视频| 洪真英av韩国精品三级| 国产精品一区二区三区不卡| 欧美综合精品久久久| 国产日韩av无码免费一区二区| 成人午夜视频第一精品区| 国产成人成网站在线播放青青| 国产精品线在线精品| 老司机免费福利午夜入口ae58| 欧美精品久久久免费观看| 国产精品专无码专区| 老外橾女人免费网站| 日本在线免费播放| 少妇人妻之无码专区视频| 国产一本一道久久香蕉| 国产综合内射日韩久| 国产剧情久久久性色| 18禁止免费福利免费观看| 在线中文国产制服欧美| 2016国产一区日本在线| 欧美性大片xxxxx久久久| 亚洲高清无色欲| 国产日本视频| 古典综合日韩欧美| 大陆老熟女露脸对白视频| 奇777超碰欧美日韩亚洲| 亚洲中文字幕国产综合| 好大好深好猛好爽视频 | 国产日韩欧美一级视频片| 亚洲男人无码Av网战| 亚洲一区自拍高清亚洲精| 日本一区二区在线免费| 91免费精品国自产拍在线可以看| 久久婷婷天天爽天天干| 亚洲图片片在线观看| 最近2024中文字幕免费看在线 | 午夜男女大片在线观看| 一级毛片一级片电影| 婷婷色中文在线视频| 啊灬啊灬啊灬快灬深用两性| 松下纱荣子人妻中字在线| 欧美一区二区国产精品九色| 午夜毛片大秀视频| 午夜成人福利一区二区在线观看| 人妻无码一区二区三区免费视频 | 亚洲六七八月丁香综合网| 黑人一区二区三区无码视频 | 久久久久国产综合精品女| 亚洲av永久午夜在线观看红杏| 成人伦理在线观看国产| 老子影院在线观看理论片| 丁香五月婷婷视频良家人妻| 国产午夜影院操一操| 一本久道AV无码专区加勒比| 又色又爽又黄又粗暴视频| 亚洲97一二三区| 国产一本一道久久香蕉| 脱衣服吃奶摸下面网站| 有色免费无码在线| 中文无码av毛片人妻免费| 男人添女人下面免费毛片| 色屁屁www影院免费观看视频| 成人午夜福利视频免费| 强制黄色无码网址国产又大又粗| 免费无码国产一区二区三区| 91乃黄色免费看| 国产亚洲va精品在线观看| 无遮挡1000部拍拍拍免费视频| 天天爱天天爽天天喊| 一区二区亚洲精品国产精| 男人与女人做爱视频| 高清有码巨乳日本在线| 家庭教师波多野结衣波国王| 国产成人综合手机在线播放| 乱人xxx国语对白91| 日韩精品在线免费观看免费视频 | 国产成人精品日本亚洲77上位| 日韩无码视频网站搜索| 亚洲精品秘在线观看| 亚洲高清无色欲| 日韩 欧美 亚洲 国产 另类 综合| 波多野结衣在线观看一区二区| 国产午夜在线一区| 91久久蜜月香蕉国产熟女线看| 嗯啊快点一级毛片免费视频| 另类欧美视频| 亚洲六十熟女系列| 国产91免费观看在线直播| 国产精品三级?三级三级午夜| 国产系列一区二区| 亚洲国产精品白丝在线观看| 欧美18videosex性欧美群| 激情婷婷九月天| 再深点灬舒服灬太大了好硬好爽| 巨胸美乳无码人妻视频漫画| 欧美大胆a视频| 一级欧美大片一级日韩大片| 欧美丰满色妇高潮| 国产在线不卡一区二区完整版| 亞歐日韓毛片在線看免費網站| 亚洲日本乱码熟妇色精一二| 欧美日韩一区二区三区影视| 國產成人綜合久久精品推最新| 国产人妻性生交大片一级直播| 欧美破苞系列二十三铁牛影视| 伊大人久久香蕉视频| 在线国产三级片| 一区二区三区视频免费在线观看| 欧美丰满熟妇高潮潮喷XXX| 日韓歐美精品有碼在線觀看| 日本成人黄色视频在线| 精品无码一级片在线看| 久久亚洲91精品| 亚洲福利色视频在线看| 极品美女毛片久久| 亚洲一区二区三| 天天日夜夜摸| 免费国产特级黄色片| av中文字幕在綫亚洲| 国产aⅤ久久免费精品 | 国产精品一级av毛片在线| 亚洲黄色av网址| 最近中文字幕视频完整版在线看| 亚洲乱码AV鲁丝一区二区三区在线观看 | 亚洲一级夜夜爽| 国产裸体美女无遮挡免费看网站 | 亚洲精品紧身裙女教师| 一本一道色欲综合网在线观看| 久久精品99精品国产香蕉| 亚洲午夜精国产精品性爱| 97就要鲁就要鲁夜夜爽| 欧美在线观看免费一区视频| 亚洲免费电影一区二区三区| 国产麻豆放荡av激情演绎 | 婷婷色中文在线视频| 欧美亚洲日本久久久久久| 国产精品一卡二卡三卡视频免费观看| 精品国产高清Av自产拍在线| 亚洲高清无色欲| aaa成人永久在线观看视频| 岛国免费v片在线观看| 国产福利精品导航网址| 国产在线精品自偷| 俄罗斯老太婆牲交视频| 伦理片2488电影伦理片| 无码国产精品高清免费久| 亚洲女人天堂色在线7777| 国产亚洲精品天堂| 亚洲日本黄色免费观看| 亚洲?V无码乱码国产精品| 国产人妻性生交大片一级直播| 国产 福利 小视频| 久久91久久91色欲精品| 成人在线观看国产一区| 欧美亚洲日本熟女| 欧美亚洲视频播放一区| 国产大片精品免费永久看nba| av无码一区二区三区午夜| 午夜午夜黄色毛片| 最新最爽中文字幕| 久久久久人妻精品系列| 国产一级特黄高清大片多人| 精品久久久久久人妻无码中文字幕 | 性感美女xxx视频| 99永久视频在线观看免费| 拍国产乱人伦偷精品视频果冻传媒| 國產成人綜合久久精品推最新| 天天精品资源在线观看| 黄色软件视频在线观看| 国产精品国产三级国产?v主| 99国产精品免费视频| 中文字幕人妻色偷偷| 99在线热只有精品6| 久久国产精品日本亚洲| 欧洲亚洲无码电影| 国产美女久久久精品毛片| 真人黄网站亚洲欧美日韩| 99久久精品无码一区二区三区| 国产日韩欧美亚洲第一| 专干日本熟妇人妻| 无码日本精品一区二区免费式桃色| 自拍偷拍综合一区| 欧美成人福利片| 亚洲不卡无码永久在线观看| 97人人揉人人捏人人添电影| 亚洲精品视频乱码| av激情影院在线看| 自拍日韩美国AV| 婷婷成人亚洲综合国产麻豆| 亚洲欧美日韩电影二区| 動漫精品第一區二區三區| 国产亚洲香蕉贫乳在线| 黄色一级毛片a级毛片| 国产成人成网站在线播放青青| 超碰97人人爱97| 人妻少妇被猛烈进入中文字幕 | 国产成人无码免费视频79| 成人版电影在线观看| 少妇一级婬片免费放真人一级黄毛片| 亚洲性爱成人社区| 一级特黄a免费大片| 黄色韩国视频网站免费在线| 黄色标志的软件下香蕉在线精品视频在线观看| 人妻少妇看a偷人无码精品视| 黄片av在线免费| 天堂网2024亚洲系列亚洲系列| 曰本人强奷野外女人动态图| 欧美一区二区三区久久妇| 国产精品v欧美精品v日韩精品心得| 久久国产精品波多野结衣?V| 欧美人妻另类首页| 综合伊人二区狠狠久草在线| 欧美日韩亚洲一区二区三区在线观看 | 人妻夜夜大爽| 亚洲私人精品影院在线播放| 五月天婷亚洲天久久综合网| 人妻精品久久无码专区不卡| 亚洲视频每日更新免费| 欧美丰满色妇高潮| 一级在线视频| 国产成人亚洲精品色欲| 亚洲欧美国产动漫| 中文字幕第5页| ?愛妃?亚洲AV无码H成人精品网站| 亚洲成?人一区二区三区| 这里只精品热在线国产| 亚洲精品天堂网在线观看同性| 丁香五月婷婷视频良家人妻| 日本特黄天天看特色大片| 黄色成人影院亚洲欧美a| 亚洲中文字幕久久电影| 中文字幕人妻熟女人妻洋洋| 日本精品在线不卡| 一区在线看中文字幕| 男人捅女人60分钟免费看| 欧美剧场成人精品午夜| 免费视频二区| 精品视频午夜福利| 最近最新中文字幕大全手机| 欧美精品一区二区99| 91嫖妓国内站街老熟女| www.婷色情网一区| 欧美无砖专区一中文字目复| 色中色成人导航| 日本孕妇潮喷高潮视频| 国产?片免费线观看| 四虎8848精品成人免费网站 | 亚洲乱码AV鲁丝一区二区三区在线观看| 超碰在线好屌妞这里只有精品| 国产黄色视频观看| 亚洲中文字幕另类人妻A天堂| 天美传媒唐一涵视频在线看| 日本暖暖视频在线| 午夜福利无码不卡一区| 肌肌桶肤肤软件下载大全| 亚洲精品国产电影午夜在线观看 | 亚洲国产成人精品区综合久久| 日本真实娇小xxxx| 香蕉网伊在线中文字青青| 在线电影高清| 国自产精品手机在线观看| 天天精品资源在线观看| 亚欧无码网站视频一二区| 日韩一区国产二区欧美三| 又粗又大又黄又硬又长的网站| 97超碰人人摸人人探| 成年爽片在线免费观看| 2019年毛片免费观看| 日本暴力强奷在线播放| 亚洲永久精品1区2区在线观看| 欧美日韩国产成人精品视| 欧美最猛性视频另类| 国产女主播视频网站大全| 欧美一级婬片人妻区美| 国产一本一道久久香蕉| 久久国产精品亚洲精品午夜| a级国产乱理伦片在线观看99 | 高清不卡一区二区三区| 经典久久国产毛片| 婷婷综合激情亚洲狠狠首页| 老牛精品亚洲成av人片| 国产高清视频?在线观看| 一二三四视频社区在线中文 | 亚洲日本在线有码| 在线欧美卡1卡2卡三卡四| 免费观看国产一区二区三区| 在线精品一区二区二区无码免费视频| 婷婷色中文在线视频| 亚洲春色国产欧美一区二区 | 中文字幕āv无码不卡免费| 另类欧美视频| 影音先锋亚洲一区亚洲二区| 一级欧美大片一级日韩大片| 亚洲高清中文字幕精品| 草莓污视频是一个聚合了草莓视频免费观看| 蜜桃久久久久久久久久久久| 亚洲产精品VA在线观看| 国产精品裸体无遮挡| 国产精品99久久久| 国产成人久久综合二区| 欧美精品欧美激情免费区 | 91久久综合精品五月天| 黄色三级片日韩毛片| 久久99在线免费视频| 久热这里只精品热在线观看| 亚洲产精品VA在线观看| 亚洲 欧美 日韩中字幕| 人妻少妇中文字幕456| 欧美日韩在线免费观看网址你懂的 | 乱人xxx国语对白91| 无码黄片大全在线观看| 成人午夜福利国产| 欧美在线一区二区视频| 另类欧美国产日韩精品久久| 国产精品国产三级国产?v主| 在线视频一区日韩精品动漫| 等不及在车里就来开始了软件| 中文乱码字幕在线观看播放 | 精品久久久中文字幕二区| 最新中文字幕äV无码不卡| 污app视频下载芒果APP| 亚洲国产精品日韩欧美一区| 黑人又大又粗又长进去很舒服 | 亚洲国产成人久久精品图片| 亚洲天堂一区无码在线观看| 狠狠色丁香婷婷综合久久97| 丰满人妻被公侵犯高清版| 亚洲经典国产精品| 欧美成人生活在钱| 大菠萝福利污下载APP| 影音先锋悠悠AV资源| 国产精品欧美韩日图片| 国产精品裸体无遮挡| 午夜欧美视频网站| 午夜国产精品亚洲免费看片| 国产精品久人妻精品| 国产高清在线视频伊甸园| 免费一级毛片中文字幕| 亚洲欧美日韩国产区| 一道本在线国产中文无码| 亚洲日韩 美腿丝袜 麻豆| 欧美成人精品电影在线观看| 无码任你躁久久久久久牛牛| 中文字幕亚洲色妞精品天堂| 日韩一区二区丰满人妻在线不卡| 免费模特国产在线观看| 范冰冰性xxxxhd杨幂性xxxxhd | 欧美亚洲综合另类自拍| 亚洲在av人极品无码| 欧美亚洲三级中文字幕| 午夜香吻免费观看在线播放| 亚洲精品综合精品自拍日韩| 久久天堂av综合无码专区色欲| 亚洲 欧美 综合一区| 国产小电影在线播放| 国产精品一级不卡的一区二区三区 | 成人精品视频一区| 亚洲欧洲无码久久αv影院| 人妻日韩AV中文不卡在线| 婷久久狠狠一区二区三区| 又黄又粗又长的色网视频| 国产一级插插插| 亚洲五月六月丁香缴情久久| āv网址在线免费观看得| 女教师被内谢流白浆在线观看| 日韩亚洲制服丝袜中文字幕| 亚洲av成人中心| 午夜福利手机免费观看| 污污污网站在线观看91躁| 麻豆精品秘 国产传媒AV消防 | 我是爸爸的女人中字头| 久久99精品免费看国产| 免费人成在线视频无码高清| 國產裸模視頻免費區無碼| 伊人999精品视频| 一级欧美aa黄片| 亚洲国产综合在线一手机版| 亚洲精品素人在线观看| 欧美尤物乱伦欧美高清欧美| 亚洲av无码成人精品区不卡在线| 91人人操人人操| 亞洲國產一區二區三區中文字幕| 天天日夜夜摸| 久久午夜AV鲁鲁无码免费| 一级a性色毛片久久无码| 私密粉嫩多久做一下| 国产综合?V一区二区无码| yy6080新视觉在线理论片| 欧美成人精品第一区二区三区日韩码一码二码三码区别69 | 国产人妻性生交大片一级直播| 99久久久a片无码国产精| 欧美亚洲高清在线一区| 好男人资源网在线影院| 偷在线精品自拍偷无码专区| 国产精品久久久久久无码AV草莓| 激情在线欧美91| 日韩精品亚洲电影天堂| 尹人香蕉久久99天天拍欧美P7| 久久一品天天睡夜夜睡| 国产免费制服丝袜网站| 可以免费观看的毛片| 无码中文字幕乱码二区| 老板含着她的花蒂啃咬高潮| 午夜精品褔利一区三区蜜桃免费| 亚洲av成人中心| 特黄无码在现一区二区| 国产精品免费理论在线观看| 久久www免费人成人片无码| 欧美人妻aⅴ中文字幕不卡| 在线欧美亚洲观看天堂| 国语对白激情视频在线| 一级毛片女人视频| 亚洲精品无码专区在线观看| 激情网站免费看| 洪真英av韩国精品三级| 91国产丝袜在线播放动漫| 波多野结衣片子精品无码| 国内熟女精品熟女a片小说| 亚洲日本一区二区三区精品| 国产高清乱码爆乳女大生AV | 激情偷拍亚洲美色| 欧美激情一区二区在线观看不卡 | 近亲乱中文字幕久热| 国产免费制服丝袜网站| 国产尤物无码无毒不卡| 久久久国产免费| 免费观看美女露全身视频在线软件| 国产青草视频免费观看| 午夜爽爽爽男女免费观看hd| 久久狠狠97色精品无码久久久| 欧美综合精品久久久| 亚洲中文无码视幕| 久久vs亚洲五月天| 国产亚洲成av人片在一线观看| 大香蕉天天噜在线视频| 国产午夜精品无码理论片| 韩国女主播福利视频| 免费A级毛片18禁网站APP| 久久国产流畅av三级片| 99re视频热这里只有精品7| 国产色AV一区二区| 黄色一级毛片a级毛片| 精品久久久久AV电影| 日韩国产妖精视频xxxx| 欧美日韩一区二区三区影视| 无码a啊V国产高清| 三级国产全黄视频在线观看| 国产麻豆农村好看的毛片视频 | 亚洲精品无码高潮喷水a片小说| 国产乱弄免费视频观看| 天天射天天摸人人色| 久久婷婷五月综合色国产页| 中文亚洲日韩精品另类小说| 久久免免费人妖视频| 无码少妇Av一级片| 久久久久久国模大尺度人体| 激情六月丁香婷婷四房播| 手机看片国产免费现在观看| 国产极品午夜a片爽歪歪漫画| 在线观看黄色视频的网站| 国产欧美另类精品又又久久| 中國日韓歐美中文日韓歐美色| 一级黄色片免费播放| 國產精品中文久久久久久久| hd国产天美free性xxhd| 区一区二区三精品免费视频| 亚洲伊人久久大香线蕉欧美| 欧美日韩在线免费观看网址你懂的| 羞羞视频免费在线观看| 欧美亚洲日韩色图| 综合国产美女主播福利| 午夜成人福利一区二区在线观看| 国产精品萌白酱在线观看| 911精品高清影院| 亚洲无碼熟女寂寞少妇| 亚洲动漫美女全裸1区2区3区| 国产精品宾馆在线精品| 国产福利一区二区精品视频資源免費看 | 久久99精品免费看国产| 亚洲激情在线观看| 国产欧美日韩综合亚洲| 思思久久好好热精品国产| 在线观看免费av的网址| 亚洲激情一二三四入口少妇| 无码黄色大片| 天美麻花星空高清免费版的特点| 99久久国产自偷自自偷免费一区| 果冻传媒免费| 免费无码婬AAAA片在线漫画 | 91色伦在线视频色女| 国产福利在线观看91精品性色| 91在线国产观看| 天天免费看国产一区二区二区| 香蕉伊在线视频观看| 欧美日韩三在线中文字幕| 国产精品视频2358| 伦埋琪琪久久影院三级| 国产亚洲美女在线观看| 爆乳熟女高潮大叫| 欧美一线高本道视频| 一级毛片完整免费版| 五月天婷亚洲天久久综合网| 国产一级久久精品免费| 大白长腿美女裸体视频| 丰满人妻被公侵犯高清版| 天天躁夜夜躁狠狠夜夜| 999精产国品一二三区| 白丝裤袜灌浆脚交av免费观看| 国产又黄又硬又粗天天综合网91| 欧美熟妇精品一区二区蜜臀视频| 成人羞羞视频在线观看网站| 国产一区二区无码区| 国产精品一级毛片无码老人| 成人女人免费毛片视频| 国产日本一区黄11| 日本无遮挡h肉动漫在线观看| 禁无遮挡羞羞污污污污网站| 一道本在线国产中文无码| 国产精品日韩欧美在线观看网址| 停电了被男同桌狂揉我奶胸动态图| 爆爽h全免费视频| 国产午夜精品片一区二区三区| 日本r级在线中文在线播放| 色综合色欲色综合色综合色乛| 国产精品视频一区二区三区免费| 日韩中文无码AV系列电影| 亚洲欧美一区二区高清| 好满射太多了装不下了APP搜狐| 在线观看不卡视频一区| 在線觀看國內自拍視頻| 韩国女主播福利视频| 专区在线观看中文字幕AⅤ| 国产凹凸在线视频一区| 波多野结衣中文字幕在线| 四虎影视永久在线观看| 久久伊人中文无码| 少女视频哔哩哔哩免费播放| 性色在线视频| 久久久久国產麻豆无碼av| 欧美精品一二三四区| 亞洲綜合春色另類久久| 中文字幕爆乳JULI?女教师| 在线精品一区二区二区无码免费视频| 亚洲精品素人在线观看| 亚洲色噜噜噜在线观看| 北条麻妃大战黑人hd| 亚洲午夜精品在线| 福利视频免费看| 久久久精品一二三区| 青春草视频在线播放| 91久久资源国产| 少妇无码专区免费无码视频| 国产91在线拍偷自揄拍无码| 日韩青草青草久热精品视频在线网站乱码| 成人伦理在线观看国产| 亚洲AV小说在线观看| 无遮挡1000部拍拍拍免费视频| 无码人妻AⅤ一区二区三区三级| 亚洲经典一曲二曲三曲无码| 国产a一级无码毛片一区| 2020亚洲精品自拍| 精东传媒vs天美传媒电影| 伦理片2488电影伦理片| 天天躁夜夜躁狠狠夜夜| 国产精品久久午夜伦鲁鲁| 香蕉99久久久久成人网站蜜| free农民工熟妇丰满hd| 狠狠躁夜夜躁av网站色| 国内老熟妇乱子伦视频精品人妻人人做人人爽夜夜爽 | 99久久久精品免费观看国产麻豆| 国产精品久久av影院| 久产久人精午夜精国| 国语的ZOOFILIA杂交VIDEOS新| 成年片精品视频网站| 91传媒在线观看视频| 国产成人国拍精品偷伦| 国产一区二区三区在线精品专区| av中文字幕潮喷人妻系列互动交流 | 久久精品欧美一区二区三区麻豆 | 伦埋琪琪久久影院三级| 成人午夜福利视频免费| 亚洲AV综合色区无码二区爱AV| AV无码AV在线A∨天堂毛片| 国产手机在线亚洲国产福利| 大菠萝福利污下载APP| 亚洲在av人极品无码| 日韩一区二区三区在线中文字幕| 精品国产福利第一区永久| 国产欧美一区二区三区免费不卡在线 | 91精品国产综合久久麻豆| 91嫩草久久久精品影院| 亚洲国产精品一区二区三qu| 国产成人亚洲色婷婷| 亚洲āv无码专区在线播放中文| 一本久久精品一区二区不卡| 日韩中文无码AV系列电影| 老熟仑妇乱一区二区av| 成人自拍视频| 三级片av不卡顿| 国产精品一级毛片无码老人 | 亚洲自拍影视欧美| a级中国产乱理论片在线观看| 欧美高潮喷水在线播放| 性69视频一区二区三区| 日韩精品免费看| 欧美日韩国产在线人成被窝网| 俄罗斯老太婆牲交视频| 超长无码AV片不卡| 家庭教师波多野结衣波国王| 很污的视频 爱操在线观看| 毛片视频一区二区| 无码A级毛片特黄| 国产av成人一区| 羞羞答答免费人成黄页在线观看国产| 亚洲日韩欧美视频二区国产| 精品动漫在线观看不卡日本| 精品国模一区二区三区浪潮| 99精品网免费播放| 亚洲国产综合在线一区男同| 夜夜嗨亚洲av成人综合| 日韩人妻少妇久久97人妻| 9日韩精品久久无码中文字幕| 久草综合电影片| 久久99中文人妻无码专区| A V无码小缝喷白浆在线观看| 中文字幕久久按摩| 久久黄色a级电影| 影音先锋亚洲国产中文| 欧美亚洲日韩色图| 欧美日韩国产天堂| 久久精品欧美一区二区三区麻豆| 少妇美女一区二区三区| 国产免费高清视频a一区二区三区不卡| 洲精品无码专区午夜18禁| 欧美午夜成年片在线观看| 久久综合久久一个色综合| www免费视频在线观看播放| 天堂视频一区二区免费在线观看 | 欧美一区二区视频免费| 久久综合视频网| 午夜久久久久久亚洲国产精品| 小说区图片区综合久久关美脚| 中字无码第2页| 亚洲激情第一区第二区| 草莓视频在线观看免费视频| 欧美人妻aⅴ中文字幕不卡| 午夜福利美片一级啪啪剧场| 激情六月丁香| 经典久久国产毛片| 男女全黄一级带免费| 毛片网站视频| 人人澡欧美一区| 午夜av亚洲va欧美ⅴa在线| 91嫖妓国内站街老熟女| 亚洲黄色大片儿在线免费播放| 啊啊啊色网视频免费| 亚洲免费美女动漫精品二区 | 黄色一级毛视频在线观看| 国产精品亚洲丝袜专区| 欧美成人vr在线高清精品| 国产香蕉2021最新福利| 久久综合免费国产精品| 精品国模一区二区三区浪潮| 日韩免费观看欧美| 国产又黄又粗又长色网视频| 欧美日韩一区二区三区视须播| 在线免费观看的黄色国产视频网站| 精品人妻a片在线视频| 日韩精品亚洲电影天堂| 性欧美俄罗斯乱妇| 久久激情欧美| av中文中字在线| 亚洲αv成人一二三区观看| 中文字幕日本人妻久久久兔费 | 一区二区三区四区亚洲无码| 歐美日本亞洲| 无码少妇Av一级片| 日韩熟女视频一区| 天天躁日日躁狠狠躁欧美老妇不卡| 久久狠狠97色精品无码久久久| 欧美破苞系列二十三铁牛影视| 亚洲日韩欧美视频二区国产| 羞羞答答免费人成黄页在线观看国产| 范冰冰被躁得嗷嗷叫高潮了| 国产公妇伦在线观看| 狂c躁到高潮视频免费网站| 精品在线日韩av| 草莓污视频是一个聚合了草莓视频免费观看| 和老外交换太大了第二部分| 黑人寄宿人妻无删减| 亚洲精品一区二区18禁漫画 | 亚洲AV无码精品国产成人..| 无码葵司精品一区二区三区99| 伊人亚洲综合网色aⅴ| 日本天堂网在线视频| 老子影院在线观看理论片| 两男一女3p太爽了 | 欧美久久91精品| 最新欧美日韩∨a| 日韩av中文字幕在线观看地址| 国产在线一区对白麻豆 | 亚洲精品视频成人| 最近2019年免费视频播放| 国产中文久久综合| 亚洲一区精品伊人久久| 国产精品无码一区二区三区太| 乳色吐息1~2全集播放| 国产日产欧产精品精品推荐小说 | 在线观看国产网站址| 色五月激情五月亚洲| 亚洲成人黄色作品播放| 亚洲国产成人精品区综合久久| 在线播放国产不卡视频| 国产国拍精品a∨在线观看| 久久天天躁狠狠躁夜夜aⅴ| 国产一区二区三区国产精品| 亚洲做a爱片一区二区三区| 无码精品视频在线观看| 深爱激情五月天伊人| 看女生逼逼的软件| 一区视频免费在线观看| 久久精品xX老女人老配少| 日本真人啪啪免费动态图| 公交车大龟廷进我身体里视频| 91一麻豆一极无码毛片| 最新亚洲aV日韩aV| 精品视频午夜福利| 午夜福利在线播放免费| 亚洲成?人一区二区三区| 东京久久香蕉精品综合色| 麻豆美女裸体免费视频| 在线观看ktv国产精品| 99在线观看一道本视频二区| 久久久一本精品66久久精品99| 草莓视频成人污污在线观看| 老板含着她的花蒂啃咬高潮| 大黑人性xxx交亚洲欧美另类一区 轻点嗯啊视频在线观看日本 | 国产精品一级不卡的一区二区三区 | 特级毛片一级美国黑人| 无码国产精品高清免费久| 三级乱伦亚洲综合| 日韩欧美成人夫妻生活网| 日韩一区二区三区无码专区| 美女黄的免费视频| 三级乱伦亚洲综合| 最新人妻中文字幕1页| 无码无套少妇毛多69xxx| 中文字幕在线亚洲第一| 成色p31s是国精产品吗| 亚洲+变态+欧美+另类+精品| 欧美不卡中文字幕一区二区| 黑人大荫蒂BBBBB视频| 欧美性色生活片天天看99| 国产午夜精品片一区二区三区| 黄p网站免费网站在线观看不卡| 大香蕉91在线播放| 99久久精品国产一区二区桃色| 天堂视频一区二区免费在线观看| 国产福利一区二区精品视频資源免費看 | 日韩欧美一区二区国产| 久久久精品一二三区| 欧美日韩人妻字幕一区| 男破女处身过程视频国产| 大菠萝福建导航导入网站花季传媒4iOS| 国产va在线一区二区三区| 毛片网站视频| 国产在线国偷精品免费看| 99在线观看一道本视频二区| 337p亚洲人术艺术| 一级特黄a免费大片| 精品日韩免费观看在线视频| 亚洲日韩国产精品一区二区三区| 日本最新中文字幕高清DVD专区| 国产精品麻豆久久久久久无码专区| 国产熟女一区二区丰满| 中文乱码字幕一二三视频| 老司机AV免费福利网站| 中文字幕高清中文字幕在线视频| 国产av毛片久久| 国产亚洲精品成人a片麻豆| 国产亚洲经典在线观看| 暗哟交小U女国产精品袍频| 国产极品粉嫩馒头一线天图片| 午夜精品亚洲欧美一区二区| 黄色在线不卡| 午夜影视免费x看| 嗯灬啊灬把腿张开灬所有漫画| 亚洲在线免费观看高清视频| 久久免费国产a级片| 日韩在线中文av中文字幕| 91一二三区不卡| 欧美日韩免费不卡| 免费精品一区二区三区第| 激情网站免费看| 久久日本国产精品123| 欧美一区亚洲一区偷拍一区| 91久久资源国产| 婷婷丁香八月| 久久精品国产精品亚洲艾草网| 亚洲无码高清久久| 日韩国产精品久久香蕉免费播放| 国产精品青草久久福利不卡探花| 日韩亚洲制服丝袜中文字幕 | 一级毛片日韩高清| 伊人亚洲综合网色aⅴ| 秋霞国产一级视频在线| 国产91免费观看在线直播| 亚洲日本在线中文| 内射视频刺激好硬好湿| 国产亚洲欧美日韩男男网站 | av三级毛片免费看| 亚洲日韩国产精品一区二区三区| 欧美三级视频一区二区三区| 国产区中文区小说区| 在线播放国产女同闺蜜| 中文字幕乱在线国产伦精品一区二区三区妓女 | 黄瓜茄子樱桃视频app| 10000拍拍18勿入免费视频| 国产亚洲精品首页| 亚洲清纯自偷自拍另类专区| 国产真实乱子视频网站| 黑人一区二区三区无码视频| 午夜av福利在线播放| 欧美a级在线视频| 乖灬舒服灬别拔出来灬视频| 久久亚洲天堂AV| 欧美+国产+日本+a高清| 东京热啪啪AV男人的天堂| 亚欧乱色一区二区三区| 久久婷婷人人澡人爽人人爱| 国产又黄又爽又刺激的免费网| 老鸭窝laoyawo国产毛片| 国产亚洲欧美激情电影一区| 亚州无码一级久久免费视频| 特级做a爰片毛片免线看在线| 97国产婷婷综合在线电影| 亚洲精品国产?Ⅴ综合第一| 经典肥岳短篇系列小说推荐| 亚洲国产精品美女久久久久| 任你躁国语自产一区在线播放| 欧美熟女性爱视频| 欧美日韩日本中国高清视频在线| 青青草青青操在线| 这里只精品热在线国产| 国产精品一卡二卡三卡视频免费观看| 免费无码又爽又刺激高潮不断| 男女18一级大黄毛片免| 看午夜大片特色视频国产| 亚洲高清无码中文字幕| 69影院波多野结衣在线| 久久久久久国模大尺度人体| 欧美区亚洲区一区二区| 午夜福利不卡在线视频| 日韩a毛片免费全部播放完整 | 深夜免费福利| 中文字幕亞洲綜合久久| 欧美大胆a视频| 唯美清纯另类亚洲制服| 黑料不打烊tttzzz入口2023| 999热视频在线观看| 搞机time软件app免费下载安装| 欧美熟妇另类久久综合资源| 无码国产精品高清免费久| 亚洲精品成人久久www| 一区二区三区四区久久| 欧美高潮喷水在线播放| 国产成人精品亚洲一区| 亚洲欧美一区二区爽爽爽| 97国产婷婷综合在线电影| 看真人视频一一级毛片 | 少妇人妻之无码专区视频| 成a人片在线观看久国产| 欧美18videosex性欧美群| 亚洲经典国产精品| 人妻少妇被猛烈进入中文字幕| 波多野结衣在线观看一区二区| 国产欧美第一页视频在线观看| 国产丰满乱子伦专区| 青青草成年在线视频| 亚洲乱码一二三四区国产| 黄色三级av网址| 曰本人强奷野外女人动态图 | 好吊妞这里有精品视频| 久久最先精品视频| 天堂久久天堂av色综合}| 欧美日韩国产综合片区| 伦理片2488电影伦理片| 中文字幕亞洲綜合久久| 手机在线免费观看视频| 亚洲 欧美 综合一区| 国产日韩欧美在线观看视频| 国产粉嫩高中无套进入| 美女视频网站永久免费| 国产高清一区二区动漫| 日产国产欧美自拍| 国产av一区二区影院cao| 久久久久久国模大尺度人体| 亚洲欧美日韩国产区| 国产精品秘麻豆果冻传媒在线| 久久久久亚洲?v成人无码| 亚洲中文字幕av无码一区| 少妇人妻之无码专区视频| 久久精品一级免费视频| 国产精品久人妻精品| 天天日夜夜摸| 欧美人妻精品一二三区| 午夜福利电影在线| 国内欧美日本在线| 亚州无码精品免费在线视频 | 国产伦理视频线视频网站| 熟女人妻av高清一区二区三区| 91人人妻人人澡人人爽国| 精品三级人无码一区二区三区| 久久精品99精品国产香蕉| 久久理论片无码中文| 国产美女视频免费18| 深爱激情五月天伊人| 亚洲成a人片在线电影| 精品国产亚洲av麻豆狂另类亚洲小说图片综合区 | 久国产av一区二区| 日韩东京夜热| 国产亚洲性欧美日韩在线观| 色妞一区二区三区在线播放| 亚洲一区无码视屏| 午夜国产综合| 日本三级中文字幕hd久久精品| 国产免费一级在线视频| 国内视频一区| 久久视最新热频这里只有精品| 日韩中文无码AV系列电影| 黄色成人影院亚洲欧美a| 思思久久好好热精品国产| 在线观看欧美区| 亚洲欧美日韩精品区| 久久婷婷五月综合色国产页| 日韩欧美久久不卡片| 亚洲AV小说在线观看| 又色又爽又大免费区欧美| 国产aⅤ久久免费精品 | 成人伦理在线观看国产| 日韩免费观看欧美| 国产作爱激烈叫床视频| 成品网站W灬源码三叶草下载| 麻豆成人版免费视频观看| 国产精品三级国产| 男男大片免a费观看视频| 美女白浆国产福利在线高清| 国产一区二区三区男同性恋 | 亞洲精品中文字幕在線| 丝袜捆绑束缚午夜一区二区在线播放视频 | 啊灬啊灬啊灬快灬深用两性| yy6080新视觉在线理论片| 好好的在线观看视频| 亚洲国产精品成人午夜在线观看| 久久婷婷欧美综合热色啪| 老司机开车樱桃视频| 欧美成人污午夜福利免费在线| 久久天天躁狠狠躁夜夜aⅴ| 亚洲国产一区刘玥在线播放| 日韩A片无码毛片免费看户外| 国产精品无码a v免费| 大胸美女裸身色诱网站| 欧美人与动牲猛交xxxxbbbb| 二级一片内射视频播放 | 国内精品无码一区二区三| 首页 亚洲 欧美 日韩| 国产一区二区∧V| 一本一道色欲综合网在线观看| 久久91久久91色欲精品| 国产亚洲欧美日韩男男网站 | 一本不卡午夜视频在线播放婷婷 | 一级欧美aa黄片| 午夜激爽视频在线播放网站| 少妇性开放视频在线观看| 免费不卡日韩欧美福利视频一区二区三区四 | 视频一区美女亚洲制服| 超碰人妻免费福利| 人人超人人超碰超国产二区| JAPANESE国产高清在线观看| 草草影院在线观看| 五月婷婷丁香花开心网中文字幕| 国产丝袜调教在线看| 少妇高潮一区二区三区9| 亚洲欧美生福利免费生活片| 國產99久久亞洲綜合精品| 亚洲综合图片第一页| 无码视频字幕在线| 国产精品久久九九99九九99| 国产在线一区对白麻豆| 国产黄色一级毛片| 久久久久9韩国三级精品一区| 欧美人成网站中文字幕| 尤物yw193在线视频| 精精国产XXXX在线视频www| 国产尤物无码无毒不卡| 国产性爱禁片网站在线看| 亚洲六七八月丁香综合网| 久久国产成人免费精品视频| 亚洲综合国产在不卡在线亚洲| 午夜影院欧美一级片| 伦理片2488电影伦理片| 亚洲欧美日韩精品久久不卡 | 中文字幕高清视频在线不卡| 999精产国品一二三区| 99久久蜜人人爽亚洲精品美女 | 亚洲av永久午夜在线观看红杏| 奇米影视亚洲春色| 亚洲无码一级黄片| 人妻无码系列:日韩专区| 歐美三級不卡在線觀看| 一男一女一床一添一摸| 午夜成人国产精品影视| 超碰CAOPORON进亚洲国产精品隔壁老王| 鉴黄师免费解锁版本| 人妻精品久久无码专区人妻| 国产av成人一区| 日本公与熄乱理在线播放| 男女全黄一级带免费| 成人国产精品视频国产| 阿锵锵锵锵锵锵锵mba智库| 日本亚洲国产中文一区二区三区 | 黄三级高清在线30分钟播放| 国产沙发系列www| 小雨去医院面试体检被老医生| 羞羞视频免费网站| 少妇无码专区免费无码视频| 性色在线视频| 午夜无码在线视频| 黄片中文高清无码| 久久精品99国产精品蘑菇| 韩欧美国产一中文字暮精品| 欧美一区二区三区视频视频| 黄色成人网站免费在线观看| 91麻豆果冻不卡在线观看| 在线观看瑟瑟网站| 亚洲精品网址在线观看| 先锋影音资源av| 在线观看国产网站址| 亚洲精品精品一线久久| 日韩天堂mv在线播放| 国产欧美一区二区三区免费不卡在线| 姬小满狂飙乳液奖励自己| 成人精品无码久久久久国产| 2023中文字幕在线观看| 视频一区美女亚洲制服| 无码少妇诱惑视频| 国产一区三区在线免费观看| 男人天堂日韩| 乱公和我做爽死我视频| 精品少妇无码专区喷水视频| 国产av一区二区影院cao| 国产黄色无码| 国产精品制服丝袜另类一区 | 人妻体体内射精一区二区三区| 国产AV国产高清国产AV| 老司机免费性爱视频| 亚洲欧洲国产综合av| 久久青青草原亚洲av无码国产| 韩国美女精品久久久久久 | 国产免费AV一区二区三区四区| 大香蕉91在线播放| 亚洲人妻偷拍| 国产人成视频在线观看免费| 97se色在在线视频| 日本无遮挡h肉动漫在线观看| 果冻传媒免费| 午夜性刺激免费看视 | 亚洲无碼熟女寂寞少妇| 涩视频成人永久免费观看网站 | 靠视频大全视频免费国产| 手机永久免费观看av片高清无码| 亚洲欧美日韩中文国产| 白丝喷水视频| 人妻含泪握住粗大迎合| 无码精品人妻一区二区8MAV| 欧美九九久久在免费线| 亚洲成av人片在线不卡| 亚洲AV无码一区二区三区动漫| 国产啪视频免费观看| 91久久人人爽澡人人澡中国| 伊大人久久香蕉视频| 9日韩精品久久无码中文字幕| 国产色网三级网站| 亚洲日本黄色免费观看| 久久一本二本av| 精品伊人久久久香线蕉| 99国产精品免费视频| 欧美自拍偷拍一区| 女性自慰喷潮久久免费观看| 午夜无码免费人妻AAA片软件| 国产高清视频一区二区成年干逼 | 91色伦在线视频色女| 先锋影音资源人妻无码| 欧洲精品视频资源在线观看| 亚洲经典国产精品| 又黄又爽又免费又猛视频网站| 国产成人AV无码永久免费| 在线观看亚洲人成网址| 老熟女高潮一区二区三区影视| 国产亚洲精品成人a v片麻豆| 免费无码婬AAAA片在线漫画 | 欧美精品黄页在线视频免费| 久久91久久91色欲精品| 午夜影院国产| 精品久久亚洲三级三级片站| 亚洲国产中文欧美在线观看片不卡| 波多野結衣av一區二區三區中文| 嗯灬啊灬把腿张开灬所有漫画| 国产又色又爽又黄又刺激的网站| 免费超级乱淫播放手机版| 自拍日韩美国AV| 日韩女同在线一区二区| 国产精品人成在线观看gogo | 国产粉嫩粉嫩的18在线播放91| 久久久福利视频| 亚洲五月天在线中文字幕在线| 香蕉久久高清国产精品观看资讯| 中文字幕高清中文字幕在线视频| 91日韩精品一区二区| 成人国产精品视频国产| 成年无码AV动漫全部免费| 精品久久懂色av| 精品深夜寂寞黄网站| 国产黄色视频在线观看免费| 中文字幕高清中文字幕在线视频 | 日韩大片在线观看黑粗| 亚洲狠狠久久综合一区二区 | 影音先锋男人一区二区资源站 | 亚洲午夜福利网址| 99久久蜜人人爽亚洲精品美女| 亚洲国产精品高清| 亚洲国产成人精品女人久久成人18免费网站| 久久久网站国产精品| 久久天天操狠狠操夜夜操2021| 男女高潮吃奶添下面动态图| 亚洲精品?Ⅴ中文字幕乱码 | 天美麻花星空高清免费版的特点| 免费A 级毛片无码A ∨性按摩| 亚洲人成欧美中文字幕午夜| 国产精品无码一区二区三区太| 日本亚洲色大成网站WWW久久| 婷婷综合尤物精品国产| 午夜成人福利一区二区在线观看| 欧洲亚洲无码电影| 国产精品厂爽爽va在线| 亚洲自拍偷拍无码| 亚洲呦呦不卡无码在线观看| 亞洲歐美日韓在線不卡中文| 中國日韓歐美中文日韓歐美色| 欧美性生活片网站| 欧美精品一二三四区| 精品久久无码中文字幕一区| 国产Av美女勾搭水电工| 国产黄桃AV一区在线观看| 18成人片黄网站www曰韩 | 久亚洲中文字幕少妇| 先锋影音资源人妻无码| 日本大片免a费观看视频+播放器 | 亚洲加勒比久久88色| 女性私密部位粉嫩嫩露出来的原因| 女人高潮叫床声48秒mp3| 国产精品无码一区二区三区天美| 欧美做爰无码av片横特走秀| 91免费精品国自产拍在线可以看| 特黄AAAAAAA片免费观看| 黄床大片免费30分钟国产精品| 鐘祥振動(dòng)電機(jī)| 亚洲精品网站在线观看| 大陆老熟女露脸对白视频| 变态壮小伙和老太国语对白| 在线观看亚洲欧美日本| 国产一区二区97| 久久国产麻豆男人精品免费视频| 一级高清无码在线看| 日本孕妇潮喷高潮视频| 特黄AAAAAAA片免费观看| 99在线观看一道本视频二区 | 欧美日韩亚洲图片91| 国产免费AV东京热| 久久久久国产毛片一级版| 精品久久久久久人妻无码中文字幕| 一本不卡午夜视频在线播放婷婷 | 国产精品久久久深夜视频| 男女一级a爱做视频| 亚洲成熟丰满熟妇高潮XX| 国产精品反差婊在线观看| 亚洲性爱成人社区| 男人添女人下面免费毛片| 久久综合免费国产精品| 欧美videos另类hd肥妇色| 亚洲五月六月丁香缴情久久| 欧美大胆a视频| 久久大香萑太香蕉综合网| 亚洲欧洲一区二区av色影| 免费无码AV爱情动作片国产| 精品在线日韩av| 午夜国产综合| 欧美一区亚洲一区偷拍一区| 黑人寄宿人妻无删减| 国内毛片视频| 亚洲国产资源在线播放| 亚洲欧洲日产综合野草| 惠民福利国产两性午夜视频免费无码| 国产午夜影院操一操| 国产日产精品久久| 一区视频免费在线观看| 亚洲熟女一区二区三区免费| 老熟女高潮一区二区三区影视| 茄子视频APP污视频| 先锋影音资源av| 免费看午夜无码福利专区| 高清无码在线视频韩国| 91久久综合九色综合欧美98| 欧美粗长硬大在线视频免费| 国产丰满XXX高潮国产| 亚洲国产中文日本成人在线| 一级爱爱片欧美亚洲| 白丝美女自慰在线观看| 自拍日韩美国AV| 欧美成人vr在线高清精品| 草草影院在线观看| 国产女主播最新精品视频| 国产精品日韩精品久久99| 国产丰满XXX高潮国产| 惠民福利国产成人涩涩涩视频在线观看| 亚洲A∨日韩Av最新在线| 国产成人精品亚洲一区| 青草热久精品视频在线观看 | 久久久网站国产精品| 18禁精品一区二区三区| 国产极品午夜a片爽歪歪漫画| 两性色午夜视频免费网| 久久耐热这里有精品69| 日韩熟女视频一区| 99在线无码精品秘人在线观看 | 欧美激情在线播放欧美吧| 国产偷窥出租屋视频大全国产日韩欧美色综合 | 国产精品v欧美精品v日韩精品心得| 一级欧美大片一级日韩大片| 国产性按摩视频在线观看| 亚洲片一区二区三区日韩欧美在线综合网 | 国产激情视频免费观看| 色妞一区二区三区在线播放| 中文字日产幕乱五区| 国产重口另类极限扩张视频| 国产精品欧美极品| 亚洲五月六月丁香缴情久久| 自拍另类第一页| 私密粉嫩多久做一下| 日本三级欧美三级人妇英文| 国产免费永久黄色国产一级| 亚洲黑丝熟妇在线播放| 亚洲加勒比久久88色| 人妻精品久久无码专区不卡| 很污的视频 爱操在线观看| 亚洲日本精品污污污在线| 精品久久久久中文字幕人妻| 精品在线日韩av| 欧洲亚洲无码电影| 欧美专区中文字幕在线观看| 性色av成人精品久久| 99e热久久精品首页尤物| 调教男男Gay打光屁股小蓝网站| 午夜精品性爱无码视频福利| 99久久综合给久久精品| 成人一区手机在线播放| 亚洲成a人v无码在线| 好大好深好猛好爽视频 | 黑人一区二区三区无码视频 | 国产亚洲视频在线播放大全| 在线少妇女上内射| 成人綜合亞洲歐美一區h| 国内少妇自拍视频免费专区| 午夜福利不卡在线视频| 国产熟睡农村乱子伦视频| 白丝裤袜灌浆脚交av免费观看 | 在线观看国产一区亚洲综合| 茄子短视频成年版app下载| 羞羞视频免费网站| 黄p网站免费网站在线观看不卡| japanese国产在线看| 欧美mv日韩mv国产网站app男男| 日本r级在线中文在线播放| 久久伊人尤物亚洲| 亚洲精品中文字幕久久久| 亚洲精品视频一二三四区| 中文字幕人妻在线精品| 欧美不卡中文字幕一区二区| 人妻少妇精品福利| 天天日狠狠干三级片观看91| 欧美人妻精品一二三区| 精品在线视频亚洲| 车上他弄得我好爽高潮视频| 大神最新国自产拍在线播放| 大黑人性xxx交亚洲欧美另类一区| 神马最新午夜限制片| 边吃奶边摸下我好爽免费视频| 伊人亚洲综合网色aⅴ| 99最新国产精品精品视频| 永久综合人人视频在线观看小说| 中文高清亚洲精品| 91短视频污下载| 天天干干天天操操操| 亚洲国产日本成人在线网站| 精品国产第一区二区二三区| 欧美激情欧美精品色欲少妇| 国产精品久久久久久不久| 欧美一区二区在线高清| 国产欧美一区二区三区免费不卡在线| 色欲av永久无码一区二区| 国产精品久草电影| 午夜欧美视频网站| 好大好硬的毛片免费看| 国产成人精品午夜视频不卡| 小荡货夹得我好紧好爽| 国产av尤物久久久久了| 欧美在线观看图片区亚洲中文另内| 国产香蕉网址精品一区| 潮喷大喷水系列无码精品视频| 欧美大片一区二区三区| 日本嗯啊在线观看| 免费网站毛片在线观看| 中文字幕福利视频精品推荐| 欧美精品亚洲精品日韩专区亚洲a| 男人捅女人60分钟免费看| 一区二区免费国产| 少妇娇喘呻吟在线观看| 天天澡天天狠天干天| 99精品国产乱码久久久| 日本免费欧美一区二区三区| 欧美精品欧美激情免费区| 久久资源网亚洲av| 福利影院第一页| 秋霞宅宅236理论片| 国产精品无码一区二区三区天美 | u久久精品国产99国产精品亚洲 | 欧洲亚洲国产精品怡红院| 亚洲日本精品污污污在线| 中文字幕在线免费| 大陆精品自在线拍国语| 女人毛毛免费毛片| 草莓视频在线观看网址| 午夜日韩色欲免费| 日本一道高清不卡免费| 无码乱人伦中文视频| 中國日韓歐美中文日韓歐美色| 性爱视频网站| 天堂久久天堂av色综合}| 国产又大又黄又爽| 巜人妻被下春药按摩HD电影| 又大又粗又爽又黄少妇毛片| 国产麻豆放荡av激情演绎 | 精品456在现播放| 中文字幕AV天堂| 999 在线视频免费观| 黑人大荫蒂BBBBB视频| 久久久一本精品66久久精品99 | 人妻精品久久无码专区精东影业| 黄色在线不卡| 國內精品久久久久久野外| 精品免费欧美亚洲| 好屌妞免费在线视频观看| 免费的欧洲一级无码视频| 三年片大全在线观看动漫| 国产自啪精品视频网站丝袜| 久久国产午夜| 国产美女被遭强高潮动态图| 欧美猛男军人gay巨大| 午夜电影网免费观看一区二区三区 | 少妇高潮一区二区三区9 | 2020亚洲精品自拍| 久久精品国产亚洲?v热网站| 中文高清亚洲精品| 日本大乳高潮护士在线视频| 国产午夜波波视频在线观看| 中文 国产 字幕 欧美| 国偷自产丝袜中文字幕| 一级免费国产片| 无码专区狠狠躁天天躁中国| 97人人模人人妻人人添| 成人在线观看毛片| 2021国产精品每日更新在线观看 | 香蕉视频网页版在线观看| 国产最美女脚交视频| 国产福利在线观看91精品性色| 亚洲日本欧洲欧美视频| 秋霞国产一级视频在线| 2020国产激情在线视频| 变态捡到女婴h养成调教| 欧美做爰无码av片横特走秀| 97热爱精品免费视频37| 亚洲精品短视频| 亚洲av少妇熟女猛男| 日韩成人内射人妻| 亚洲国产中文日本成人在线| 首页 亚洲 欧美 日韩| 中文字幕在线日韩人妻精品| 狠狠操天天操| 欢迎访问欧美日韩国产大陆综合一区| 五月六月婷婷国产在线| 国产第一福利院未18禁止| 深夜福利视频在线一区| 欧美黄色三级| 老司机影视免费观看| 手机永久免费观看av片高清无码| 亚洲黑丝熟妇在线播放| 伊人成综合人网高清| 公交车大龟廷进我身体里视频| 日韩中文无码AV系列电影| 欧美国产综合日韩蜜芽| 国产午夜福利精品一| 好色先生短视频下载| 欧美精品aaa久久久影院| 中文少妇按摩久久高潮| 欧美精品亚洲精品日韩专区亚洲a| 国产白丝护士喷白浆视频| 中文字幕日韩精品亚洲一区老| 天堂网2024亚洲系列亚洲系列| 久久er20热在这里只有精品| 亚洲国产一区刘玥在线播放| 欧美高潮喷水在线播放| 国产午夜精品大片网址| 欧美mv日韩mv国产网站app男男| aaa国产免费不卡视频| 色老板免费线观看ww| 91免费黄色在线观看| 亚洲精品国产?Ⅴ综合第一| 国模大胆无码一二三区| 一二三区精品成人午夜| 欧洲免费无线码二区的做法步骤| 国产三级一区十级真人片| 亚洲成vr人片在线观看| 日韩综合一区二区性色AV| 性受无码欧美日韩av成人| 中国女人做爰视频| 一区二区三区四区久久| 午夜影视免费x看| 少妇被粗大的猛烈进出小说| 久久久久久精品久久久久| 无码专区狠狠躁天天躁中国| 婷婷综合尤物精品国产| 亚洲精品大牛影院在线播放| 7777久久亚洲中文字幕| 国产粉嫩粉嫩的18在线播放91| 国内精品视频在线观看性| 日日狠狠久久8888偷色| 亚洲日本黄色免费观看| 日韩欧美动漫在线视频| 在线国产公开视频| 国产极品粉嫩馒头一线天图片| 综合国产美女主播福利| 亚洲日韩精品看片无码| AV在线播放一区二区三区| 精品一区精品二区日韩欧| 男女全黄一级带免费| 99永久视频在线观看免费| 久久婷婷天天爽天天干| 狠狠色丁香婷婷综合久久97| 中文字幕乱在线国产伦精品一区二区三区妓女| 亚洲国产极品视觉盛宴| 美国性色av性色生活喷水| 污污视频在线勉费观看| 成人18毛片免费| 精品国产一区二区三区2021| 色五月激情五月亚洲 | 欧美成人vr在线高清精品| 亞洲免費二區| 国产欧美日韩综合在线视频观看| 亚洲国产精品久在线| 99精产国品一二三产| 国产成人成网站在线播放青青| 91在线精品免费| 欧美午夜在线免费| 亚洲国产成人精品女人久久成人18免费网站 | 日韩中文无码AV系列电影| 2019最新国产理论| 日韩理论视频| 无码一级午夜福利区久久| 亚洲乱码AV鲁丝一区二区三区在线观看 | 日韩亚洲制服丝袜中文字幕| 欧美性色生活片天天看99| 精品国产乱码久久久久夜深人妻| 色污网站免费在线观看| 久久精品欧美一区二区不卡| 波多野结衣中文字幕在线| 色综合久久一个色| 性一交一乱一交一精一品| 屁屁草草丁香婷婷网在线观看| 成人国产盗摄精品| 國產綜合久久久久鬼色| 一区二区三区四区亚洲无码| 亚洲国产精品久久电影欧美w| 欧美日韩免费不卡 | 欧美国产国产综合视频在线观看| 天堂在线亚洲视频| 一级毛片一级片电影| 老司机AV免费福利网站| 日韩精品成人性视频在线| 91在线无码精品社区| 好吊妞这里有精品视频| 精品亚洲精品| 91高清完整版在线观看| 国产欧美自拍亚洲激情111| 欧美久久91精品| 正在播放刚结婚的少妇| 久久www免费人成人片无码| 男女肉粗暴进来动态视频| 亚洲成?人一区二区三区| 91蜜桃在线国内在线播放| 91日产天堂一区| 2021国产精品久久久久免费| 一区二区三区日韩欧美国产| 无码免费一级视频毛片| 99re热免费精品视频观看导航| 久久综合国产精| 激情亚洲丁香五月av| 激情网站免费看| 国产 日韩 欧美 亚洲| 成人女人免费毛片视频| 在线免费观看的黄色国产视频网站| 亚洲第三页国内自拍| 俄罗斯老太婆牲交视频 | 调教男男Gay打光屁股小蓝网站| 欧美剧场成人精品午夜| 国产AV国产高清国产AV| yy6080新视觉在线理论片| 国产灌醉系列闺蜜| 国产精品乱子伦一区二区好看到停不下来! | 秋霞午夜鲁丝片午夜无码| 免费观看国产96视频在线观看| 国产一区二区三久久久| 精品又粗又猛又爽| 亚州无码精品免费在线视频| 亚洲欧美日韩中文国产| a夜夜爽88888视频免费看| 范冰冰性xxxxhd杨幂性xxxxhd| 久久天天躁狠狠躁夜夜2020| 欧洲在线视频免费观看完整版| 國產綜合久久久久鬼色| 女同亚洲精品一区二区三| 亚洲 欧美 日韩中字幕| 欧美日激情日韩精品99国产欧美久久久精品| 欧美日韩在线不卡一区二区| 神马最新午夜限制片| 日本不卡aⅴ免费网站| 成人久久精品一区二区三区网| 欧美午夜成年片在线观看| 美女白浆国产福利在线高清| 亚洲呦呦不卡无码在线观看| 日本三级欧美三级人妇英文| 成人性色亚洲视频| 亚洲无码福利视频app| 日也干夜也爱在线视频| 日韩中文人妻无码不卡| 亚洲动漫美女全裸1区2区3区| 日本精品在线不卡| 精品人妻a片在线视频| 午夜免費觀看| 尤物视频网页大全| 男人j进入和女人j免费视频| 国产娇喘呻吟视频在线播放| 一级毛片黄久久久免费看精品| 日韩成人激情综合写真一区二区| 国产国拍精品成人乱理片| 欧美经验偷窥在线| 丝袜精品影视| 亞洲綜合春色另類久久| 姬小满狂飙乳液奖励自己| 日韩国产妖精视频xxxx| 少妇性l交大片免费直播| 嗯啊嗯啊好深免费观看| 中字无码第2页| 日本成本人A片www| 99riav视频一区二区| 日本性色精品一区二区| 97热爱精品免费视频37| 亚洲国产中文亚综合在线欧美| 日本三级人妻a人妻一在线| 97超碰人人摸人人探| 国产精品视频分类一区| 超碰碰碰香蕉| 久久国产午夜| 久久精品国产亚av无码四区| 在线播放国产不卡视频| 欧美日韩色欲色欲色欲XXXX| 在线看美女第一区| 日本欲求不满人妻系列在线| 一级毛片日韩高清| 婷婷激情丁香| 人妻少妇被猛烈进入中文字幕 | 亚洲同志gay1069蓝男色| 偷拍粉嫩25位美女厕所图片| 欧美日本精品国产网址| 美女视频网站免费观看| 国产亚洲美日韩AV中文字幕| 777ey性欧美另类图片| 精品国产高清Av自产拍在线| 女人v天堂在线观看 | 激情做a全过程片A| 27报深夜福利动态图永久免费 | 国产A∨一区二区| 99國產精品99久久久久久| 亚洲综合成人婷婷五月天| 国产真实乱免费高清视频| 免费无码成人在线亚洲丰满| 免费黄色网址在线观看| 色综合合久久久久无码专区 | 黑人大荫蒂BBBBB视频| 国产粉嫩高中无套进入| 国产Aⅴ一区二区三区凹凸| 国产精品一卡二卡三卡视频免费观看 | 91黄色网免费观看| 国产女主播视频网站大全| 国产精品亚洲美女久久久| 久久天天操狠狠操夜夜操2021| 中文字幕人妻在线精品| 女邻居夹得好紧太爽了| 三年片高清免费观看完整版| 国产一区二区三区性爱| 国产揉捏爆乳巨胸挤奶视频| 国产亚洲性欧美日韩在线观| 欧美日韩一区二区三区影视| 国产av无码一区二区 | 深夜爽爽爽爽男女视频| 黄色一级视频网址| 在线观看艹草草| 另类小说欧美视频| 日本黄色免费在线视频| 日韩午夜福利精品在线视频| 日本r级在线中文在线播放| 久久精品国产亚洲?V无码不 | 人妻爽综合网| 婷婷五月综合国产激情| 天堂国产精品一区| 激情九月婷婷月丁香综合| 午夜av亚洲va欧美ⅴa在线| 欧美一区亚洲一区偷拍一区| 伊人久久成人成综合网222| 911精品高清影院| 国产日韩亚洲精美视频| 麻豆精品秘 国产传媒AV消防| 亚洲无码成人网站播放| 欧美精品亚洲精品日韩专区亚洲a| 国产免费不卡一区在线视频| 国产熟妇高潮呻吟声| 两性色午夜视频免费网| 黄色成人影院亚洲欧美a| 日韩手机在线观看| 久久香蕉一区二区三区| 激情网站免费看| 中文字幕第四页久久久久国产一级毛片高清版新婚 | 国模吧双双大尺度炮交gogo| 亚欧老熟妇乱色无码| 亚洲不卡无码永久在线观看| 国产免费AV综合片在线观看| 亚洲精品精品一线久久| 久久免费国产a级片| 把腿张开我要cao死你| 一区二区三区亚洲区| 国产亚欧美一区二区三区| 在线观看免费肉片aⅤ视频| 久久综合九色综合88| 少女视频哔哩哔哩免费播放| 老司机午夜精品99久久免| 性爱视频网站| 国产沙发系列www| 水蜜桃视频免费观看视频等最新内容!| 国产超碰人人做人人爰| 后进圆润翘臀极品大屁股| 污污污网站在线观看91躁 | 欧美视频成人在线| 亚洲综合av在线免费观看| А∨天堂一区一本到免费| 久久精品視頻國產劇情| 少妇性开放视频在线观看| 国产精品色午夜视频免费看| 久久亚洲国产视频91视| 免费人成在线观看视频无码| 欧美精品欧美激情免费区| 日本阿v亚洲中文字幕| 亚洲日本欧美一二三区电影| 国产香蕉网址精品一区| 欧美XXXXX高潮抽搐免费播放观看等 | 天天射天天摸人人色| 国产成人AV无码永久免费| 国产黄色视频在线观看免费| 国产午夜激无码aⅴ毛片久久| 久久无码高清一区| 少妇无码在线播放| 国产欧美精品一区二区小说| 狠狠噜天天噜日日噜韩国 | 亚洲欧洲国产综合av| 日产无码一级毛卡片一区二区三区免费| 国产亚洲情侣一区二区| 成人午夜婬片免费观看| 精品农村av毛片一区二区三区| 日韩a毛片免费全部播放完整| 亚洲日韩精品看片无码| 中文人妻在线视频| 欧洲乱码伦视频国产| 欧美一线高本道视频| a级毛片不卡视频免费看| 波多野结衣美乳人妻| 中文乱码字幕在线观看播放| 国产在线观看91一区| 性感美女xxx视频| 国产亚洲视频在线播放大全| 伊人久久中文毛片视频| 欧美综合自拍日本| 2020最新伊人日韩中文字幕| 久久久网站国产精品| 久久www免费人成人片无码| 国产精品无码a v不卡| 动漫美女黄视频网站| 老子影院在线观看理论片| 斗鱼虎牙叫床娇喘视频| 日韩精品亚洲电影天堂| 亚洲欧美日韩成人综合| 无码人妻熟妇AV又粗又大A片| 国产乱色熟女一区二区蜜臀| 伊人电影伊久久一二三| 教室停电h嗯啊好硬好湿攻守| 亚洲无码在线观看一区二区| 无人视频在线观看无码| 少妇好紧好湿视频亚洲无码| 免费毛片一级视频 | 国产wwwaaa在线观看| 亚洲黄网在线| a级国产乱理伦片在线观看99 | 午夜无码在线视频| 夜夜嗨亚洲av成人综合| 国产精品一区二区三区视频大全| 日韩免费精品男一区二区三区| 国产av无码一区二区| 老阿姨哔哩哔哩b站肉片茄子芒果| 欧美黄精品在线观看| va亚洲中文字幕无码| 免费看午夜高清性色生活片| 又色又爽又黄又粗暴视频| 在线看片日韩午夜视频免费播放 | 亚洲国产rv精品一区二| 边吃奶边摸下面免费视频| 在线观看免费av的网址| 久久国产精品永久免费| А∨天堂一区一本到免费| 人妻少妇看a偷人无码精品视| 激情偷拍亚洲美色| 午夜精品性爱无码视频福利| 國產日韓精品歐美一區色| 国产福利姬g奶紧身包臀裙 | 久久日本国产精品123| 日本一区二区在线免费| 久久国产精品亚洲国产亚洲国产| 男人的天堂不卡无码| 成人午夜婬片免费观看| 黄瓜茄子樱桃视频app| 欧洲免费无线码二区的做法步骤| 免费大片黄在线观看18中文| vvvv98国产成人综合青青| 精品久久久久久人妻无码中文字幕| 一级欧美大片一级日韩大片| 日韩中文无线码在线| 2019年毛片免费观看| 白嫩少妇高潮喷水惨叫| 女性自慰喷潮久久免费观看| 哔哩哔哩免费观看入口| 国产免费AV东京热| 国产高清视频?在线观看| 97超碰人人爱国产資源免費看 | 成人男女网18免费app| 亚洲国产中文日本成人在线| 成人午夜福利视频免费| 中文乱码字幕一二三视频| 野战一男一女一级毛片| 国产精品专无码专区| 亞洲國產一區二區三區中文字幕| 国产国拍精品成人乱理片| 国产日韩新片无码免费| 欧洲M∨日韩M∨国产无限观看| 亚洲日韩在线观看亚洲专区| 999精品视频在线观看免费| 日本乱码一区二区三区不卡| 亚洲av久播在线观看| 免费的黄色一级视频| 天天精品资源在线观看| 成年女人vr免费视频播放| 欧美日韩国产天堂| 精品人人搡人妻人人玩A片| 成人免费视频网| 一区视频免费在线观看| 国产精品无码一区二区三区电影| www.婷色情网一区| 成人精品中文字幕有码| 奇米影色777四色在线| 手机看片1024日韩精品| 亚洲欧美一区二区中文日本的| 一区二区一级黄片| 香蕉丝瓜榴莲在线观看| 欧美性生活片网站| av观看网国产在线观看| 天天影视性色香欲综合| 日韩视频精品动漫一区| 奇米影视亚洲春色| 精品最黄最色最爽视频| 无码人妻AⅤ一区二区三区三级| 香蕉97超级碰碰碰免费公开18| 日韩国产毛片一区二区三区| 一品屋精品视频在线播放| 国产超爽超碰人人做wwwcom| 少妇无码专区免费无码视频| 和老外交换太大了第二部分| 欧美变态口味重另类一区二区| 男人天堂视频在线免费观看| 公妇公侵犯波多野结衣| 国产黄色激情视频| 99精品国产乱码久久久 | 秋霞宅宅236理论片| 看女生逼逼的软件| 最近2024中文字幕免费看在线| 国产亚洲精品成人a片麻豆| 亚洲综合国产在不卡在线亚洲| 精品深夜寂寞黄网站| 亚洲无码乱伦自拍| 亚洲成av人片在线不卡| 深夜爽爽爽爽男女视频| 国产无码不卡视频| 狠狠色丁香婷婷久久综合不卡影視| www亚洲精品在线观看| 中文无码免费人成在线观看| 欧美熟妇人妻精品一区| 色网精品在线观看| 最新凹凸视频网| 肥臀熟妇高潮一区二区三区| 国产欧美另类精品又又久久| 亚洲黄色av网址| 惠民福利亚洲欧美日韩高清一区二区三区| 变态壮小伙和老太国语对白| 国产妞干网中文字幕| 伦埋琪琪久久影院三级| 亚洲精品香蕉一区二区| 午夜免費觀看| 欧美日韩国产第1页| 97公开视频免费观看| 日本孕妇潮喷高潮视频| 日本同志GAY片免费网站| 久久资源网亚洲av| 久久精品中文字| 成 人香蕉 在线手机版视频| 久久久精品综合网| 老子影院伦不卡国产| 不用vip看黄软件| 秋霞影院手机在线| 午夜免費觀看| 两个人看的视www频高清在线| 女性自慰喷潮久久免费观看| 亚洲 欧美 综合 激情 在线观看| 日本免费欧美一区二区三区| 好色先生短视频下载| 亚洲午夜福利网址| 男男禁漫画bl网站入口| 最新窝窝妺妺人体艺| 国产综合在线播放| 亚洲欧美变态另类综合| 巨胸美乳无码人妻视频漫画| 无码国产精品一区二区浪潮16| 国产香蕉2021最新福利| 偷窥福利视频| 久久天天躁狠狠躁夜夜aⅴ| 天天躁日日躁狠狠躁欧美老妇不卡 | 老熟女熟妇一区二区三区| 亚洲午夜理论影院在线观看| 久久噜噜夜色精品| 99精品丰满人妻无码视频A片| 色999日韩啪啪日韩| 日韩手机在线观看| 91日韩无码免费看| 娇妻被壮汉肉到白浆H| 免费人成在线观看视频无码| 国产老妇伦国产熟女老妇| 在线欧美亚洲观看天堂| 日本熟妇自拍偷拍视频| 国产亚洲欧美成人久久片| 久久国产午夜| 久久久久国產麻豆无碼av| 国产美女遭强高潮网站观看| 色欲色香亚洲综合夜夜福利| 久久久久久久久久久人妻| 未满成年国产在线观看| 国产公开免费在线视频| 男妓用舌头舔我高潮不退小说| 9re视频这里只有精品| 领导玩弄娇妻呻吟声不断视频 | 偷在线精品自拍偷无码专区| 亚洲Av秘一区二区二区| 惠民福利国产两性午夜视频免费无码| 精品又粗又猛又爽| 精品三级人无码一区二区三区| 暗哟交小U女国产精品袍频| 视频二区调教中字知名国产| 久久精品国产亚洲αV蜜臀色欲| 欧美日本一区高清视频| 91中文字幕免费视频| 亚洲自拍影视欧美| 国产成人精品怡红院在线观看不卡| 99久久亚洲精品图片| 久久久久国产精品蜜臀TV| 黑料不打烊tttzzz入口2023| 久久久久久国模大尺度人体 | 日本特黄特色大片免费视频老年人 | 久久久久亚洲av网站色| 日一区二区视频| 国产黄色激情视频| 亚欧老熟妇乱色无码| av诱惑一区二区| 欧美精品亚洲日韩| 国产又黄又爽又刺激的免费网| 欧美精品乱码久久久久| 一级做a爰性色毛片免费| 91大神在线精品免费福利| 91精品国产综合久久麻豆| 午夜福利无码专区在线观看| 国产高潮又爽又刺激视频| 2020国产激情在线视频| 伊人玖玖综合| 成a人片在线观看久国产| 免费黄色网址在线观看| 中文字幕一级片免费观看| 艳妇性饥渴短篇小说| 成人高清视频在线观看| 中文字幕毛片无码| 2021国产精品久久久久免费| 导航免费福利视频黑人| 亚洲国产精品成人综合色在线w | 国产真实熟女无套中出| 国产高清卡一卡二| 黑人寄宿人妻无删减| 美女爆乳18禁久久流白浆 | 日韩不卡免费中文字幕| 国产日本视频| 秋霞午夜鲁丝片午夜无码| 国产精品一区二区三区视频大全| 国产公开免费在线视频| 国产日韩欧美制服另类| 清纯唯美激情亚洲综合| 小草在线视频亚洲无码| 国产又黄又爽高潮视频h男男| 亚洲欧美日韩精品综久久久| 久久久久国产毛片一级版| 亚洲伊人久久大香线蕉欧美| 亚洲A v无码专区电影在线观看| 在线精品一区二区二区无码免费视频| 中文无码av毛片人妻免费| 久久?V无码精品人妻糸列| 国产国拍精品成人乱理片| 真人黄网站亚洲欧美日韩| 大码性感美女比基尼试穿视频| 人妻少妇伦在线电影不卡| 日韩欧美一区二区国产| 欧美精品与人动性物交| 国产精品a一区二区三| 亚洲A∨日韩Av最新在线| 10款黄台网站入口免费| 免费精品一区二区三区第| 国产无码馆免费视频播放| 亚洲桃色无码Av在线播放| 一级黄色片免费播放| 亚洲国产精品美女久久久久| 有色免费无码在线| 无码三级少妇精品| 国产精品无码一区二区三区天美| 国产大片亚州一区二区三区| 狂c躁到高潮视频免费网站| 国产又黄又爽高潮视频h男男| 成人黃色一級片91久久午夜无码鲁丝片午夜精品AAA | 欧美三级日韩| 国产大bbwbbwhd视频| 乌克兰精品一级毛片| 亚洲精品大全寸在线看片| 国产精品久久久久无码蜜三级| 国产一区二区三区肃南♀| 国产福利久久| 男生女生一起搞的30分轮滑鞋 | 中文字幕欧洲亚洲手机版| 老外橾女人免费网站| 二级一片内射视频播放 | 国产真实乱子视频网站| 国产亚洲精品网站app| 中文字幕人妻色偷偷| 国产精品国产三级国产?v主| 亚洲桃色无码Av在线播放| 深夜爽爽爽爽男女视频| 在线看免费观看日本特黄一级| 午夜福利无码不卡一区| 蜜臀久久精品国产亚洲av| 中文字幕亚洲精品8区| 后进圆润翘臀极品大屁股| 国内少妇自拍视频免费专区| 48熟女嗷嗷叫国产毛片小说| 久久天堂av综合无码专区色欲| 亚洲欧美偷国产精品一区| 超碰97久久国产人人澡高清| 激情三级无码一二三区视频| zyz玖玖色资源站先锋播放器| 国产成人精品亚洲一区| 性色欲情网站iwww| 人成欧美高清狂热视频| 国产成人久久综合二区| 好男人资源网在线影院| 韩国特级婬片A片免费看少妇| 很污的视频 爱操在线观看| 欧美亚洲视频播放一区| 欧美人妻aⅴ中文字幕不卡| 999zyz玖玖资源站最新| 亚洲乱码中文字幕在线| 亚洲无码一卡二卡| 国产av激情无码久久久无码| 亞洲免費二區| 牛牛影视ac精品视频| 久久国产精品亚洲精品午夜| 日韩大片在线观看黑粗| 黄色先锋影音成人在线| 性饥渴的风流退休老妇| 欧美激情全免费高清视频| 色胡同 热 国产の综合| 久久久久国产综合精品女| 国产91l在线播放| 欧美午夜精品精品一区| 亚州无码精品免费在线视频| 亚洲日本欧洲欧美视频| 国产精品少妇一区二区三区| 免费av网站网址在线观看| 国产精品无码一区二区三区太| 免费的欧美性爱小视频| 在线A级毛片无码免费真| 六月丁香五月激情综合首页| 亚洲精品极品在线观看| 国产午夜精品理论片a级探花| 亚洲欧美一区二区爽爽爽| 免费在线观看黄色污网站| 91精品婷婷国产综合久久性色| 久久久久久国模大尺度人体| 一區二區國產精品| 精品亚洲AⅤ在线无码播放| 亚洲午夜人成在线观看| 99国产在线日韩激情在线| 卡通动漫综合一区亚洲| 国产大片亚州一区二区三区| 亚洲日本在线有码| 欧美三级电影一区二区| 国产一道本成人电影在线观看| 亚洲日本乱码熟妇色精一二| 熟妇丰满人妻g潮| 噜噜色狠狠色粉嫩AV| 大胸美女裸身色诱网站| 日本高清视频在线www观看| 欧美久久精品伊人久久久| 无人视频在线观看无码| 日韩淫妇精品一区二区三区| 亚洲精品短视频| 日韩中文字幕无码电影| 国产精品一区二区亚洲推荐| 欧美亚洲一卡二卡| 99在线热只有精品6| 午夜影院国产| 成人网在线视频每日更新| 正在播放刚结婚的少妇| av观看网国产在线观看| 老司机AV免费福利网站| 国产区中文区小说区 | 午夜在线看日韩精品一区二区三区| 国产丝袜视频一区二区三区大长腿 | 伊人999精品视频| 亚洲国产日韩有码av| 亚洲永久精品1区2区在线观看| 人妻少妇中文字幕456| 中文字幕福利视频精品推荐 | 午夜精品性爱无码视频福利| vr欧美日韩国产va另类| 男女18一级大黄毛片免| 一区二区三区四区国产免费| 色综合午夜蜜桃久久天天综线观看 | 永久免费看特黄一级视频| 久久久噜久噜久久另类| 国产高清卡一卡二| 久草国产在线| 免费国产乱理伦片在线观看| 国产成人无码AⅤ片在线图| 手机在线免费观看视频| 做受高潮AAAA动漫| 99久久精品国产99久久久噜噜| 国产黄色激情视频| 国产免费欧美乱伦一区| 色婷婷热久久精品国产免费| 婷婷五月天三级片| 被窝视频在线观看| 成人 无码动漫一区二区三区| 日韩精品卡通动漫网站| 国产av日韩精品一区二区| 大胸美女裸身色诱网站| 久草这里只有精品视频| 日日狠狠久久8888偷色| 欧美成人生活在钱| 亚洲国产免费| 国产精品成人欧美性做久久久| 99在线热只有精品6| 亚洲欧美日韩综合在线一起来看看吧! | 欧美黑人猛男做爰xxxⅹ| 91亚洲国产成人精品性色潮| 日本特级黄大片视频播放 | 国产欧美日韩综合在线视频观看| 亚洲黄色大片儿在线免费播放| 色婷婷一区二区三区免费| 国偷自产丝袜中文字幕| 成版人性视频app玉米| 国产偷窥出租屋视频大全国产日韩欧美色综合 | 人成欧美高清狂热视频 | 性一交一乱一交一精一品| 欧美一区亚洲一区偷拍一区| 欧美丰满色妇高潮| 女性私密部位粉嫩嫩露出来的原因| 午夜性刺激免费看视| 黄色真人片一级片| 蜜桃狠狠干在| 超大胆丝袜人妻无码系列| 影音先锋悠悠AV资源| 国产精品一区激情电影| 国产一级A一级裸体片| 日产无码一级毛卡片一区二区三区免费| 精品视频一二三四区导航| 国产欧美精品一区二区小说| yy6080新觉伦aa午夜视频| 榴莲视频污在线下载| 国产午夜激无码aⅴ毛片久久| 在线观看黄片欧洲 | 免费观看无码漫画的网站| 国产精品美女免费视频| 91久久人人爽澡人人澡中国| 在线看不卡av无码| 国产欧美日韩小视频资源| 日韩AV调教在线观看| 深爱激情五月天伊人| 亚洲成熟丰满熟妇高潮XX| 亚洲日韩中文字幕一区二区在线视频| 经典肥岳短篇系列小说推荐| 久久久波多野av一区无码| 国产精品裸体无遮挡| 国产一区二区三区性爱| 2020在国产线久99| 三级乱伦亚洲综合| 亚洲无线码一区国产欧美国日| 永久免费?V无码网站性色?V| 亚洲清纯自偷自拍另类专区| 青青国产视频高清无码| 黄色一级毛片a级毛片| 国产 日韩 欧美 亚洲| 国产中文久久综合| 欧洲精美免费二区| 成人国产精品视频国产| 黄色三级片日韩毛片| 亚洲自拍偷拍无码| 国产毛片片精品天天看视频| 国产又黄的A级鬼片V片大全| 人人澡人人爽欧美精品| 无遮挡1000部拍拍拍免费视频| 欧美变态口味重另类一区二区| 少妇无码在线播放| 免费无码高潮又刺激视频| 国产女主播最新精品视频| 国产又色又爽又黄又刺激的网站| 国产一区二区不卡无在线| 香蕉丝瓜榴莲在线观看| 国产精品久久一区二| 欧美日韩国产天堂| 国产精品自拍va从这里开始| AV丝袜脚天堂网无码| 欧美日韩a精品| 欧美亚洲精品中文字幕高清| 国产精品麻豆久久久久久无码专区| 日韩一区二区三区无码专区| 操女人一区二区三区| 亚洲精品国自产在线拍| 苍井空高潮喷水在线观看磁条| 亚洲人妻偷拍| 亚洲欧美国产动漫| 国产不卡一区二区三区被窝里| 91aaa免费免费国产在线观看| 亚洲爆乳成av人在线| 偷偷狠狠的日日2020| 美日韩综合精品一区二区在线观看 | 毛片视频一区二区| 澳洲精品不打码在线观看| 亚洲午夜精品一区二区免费看| 天天干天天射综合网| 美女视频网站永久免费| 成本人在线观看视频网站| 大神最新国自产拍在线播放| 首页 亚洲 欧美 日韩| 国产综合在线播放| 喷水高潮喷水在线观看com| 美女白浆国产福利在线高清| 国产午夜精品免费观看| 国产av激情无码久久久无码| 亚洲成?人一区二区三区| 香蕉视频APP黄在线观看| 岳丰满多毛的大隂户老太的介绍| 国产va在线一区二区三区| 最新欧美色欧美理论电影| 国产电影一级视频在线| 舒淇A片一区二区三区免费看| 成人男女网18免费app| 亚洲AV日韩精品久久久久| 深夜成人福利视频| 欧美人与性动交CCOO| 成人在线观看国产一区| 日韩精品一线天馒头| 中文新版欧美日韩字幕| 亚洲AⅤ精品无码一区二区 | 亚洲呦呦不卡无码在线观看 | 无码葵司精品一区二区三区99| 狠狠噜天天噜日日噜韩国| 成年爽片在线免费观看| 91天堂а8天堂资源在线官网| 日韩无码中文短视频| 成年女人18级毛片毛片免费| 國產綜合久久久久鬼色| 欧美人妻精品一二三区| 永久免费?V无码网站性色?V| av激情影院在线看| 久久久久久精品久久久久| 亚洲精品视频一二三四区| 真人实拍女处被破的精品视频| 99国产精品免费视频| 同城约茶接单上门服务| 一级爱爱片欧美亚洲| 午夜精品褔利一区三区蜜桃免费| 男人添女人下面免费毛片| 无码中文字幕在线| 午夜在线看日韩精品一区二区三区| mm1313亚洲精品国产| 国内国外日产一区二区免费亚洲| 久久久国产免费| 欧美曰批视频免费播放免费| 911精品高清影院| 亚洲无码一卡二卡| 免费久久99精品国产自再现| 韩国日韩欧美久久久| 131少妇爱做高清免费视频| 久久久无码精品亚洲幕密乳AV | 一级免费国产片| 激情三级视频国产在线| 无码av在线一区二区三区四区| 国产激情一区二区三区小说 | 国产91在线拍偷自揄拍无码| 国产日韩欧美制服另类| 看国产特黄一级毛片短视频| cao我屁免费视频在线观看动态| 久久精品国产hd高清| 亚洲色图五月天igao国产精品| 69午夜成年免费视频| 男人插曲女人视频软件| 特黄片无码手机在线视频免费在线观看视频| 日本不卡aⅴ免费网站| 夜夜综合国产777| 看真人视频一一级毛片| 九九RE线精品视频在线观看视频| 亚洲欧美成人一区| 久亚洲AV日韩Aⅴ无码久久| 亚洲伊人久久大香线蕉欧美| 日本不卡aⅴ免费网站| 久久久人妻q无码| 亚洲成人中文字幕| 变态捡到女婴h养成调教| 黄桃AV无码一区二区三区 | 久久久久久精品免费久久理论 | 国产泄欲在线观看| 亚洲色大18成人网站WWW在线播放| 丝袜精品影视| 少妇性l交大片免费| 久久久久久精品成人免费| 欢迎访问欧美日韩国产大陆综合一区| 久精品视在线观看亚洲欧美| 亚洲a级毛片一区二区| 日本又肉又黄的视频网站| 国产成人精品日本亚洲77上位| 亚洲国产欧洲综合| bt天堂在线观看国产| 春宵福利导航院影| 久久久精品综合网| 在线观看日韩成人| 成人在线观看毛片| 国产成人国拍精品偷伦| 亚洲人成网站在线播放观看| 日韩精品精品第一区 | 日韩激情在线小视频观看| 性色欲网站人妻丰满| 国语的ZOOFILIA杂交VIDEOS新| 影音先锋亚洲国产中文| 认识几年亚洲国产精品超碰| 亚洲午夜国产精品日本亚洲欧美在线| 图片电影小说区亚洲专区| 日本一区二区在线免费| 女人下边被舔全过视频| 亚洲精品一二三区电影在线| 女同毛片免费网站| 在线观看黄片欧洲| 在线观看瑟瑟网站| 国产精品反差婊在线观看| 激情三级视频国产在线| 伊人大香焦手机在钱视| 亚州无码一级久久免费视频| 国自产精品手机在线观看| 亂倫近親相姦中文字幕完整片| 大陆精品自在线拍国语| 欧美精品 日韩一区| 精品国产无码中文| 乱视频伦裸人| 日日夜夜久久一二三区| 国产成人精品午夜视频不卡| 一区三区三区不卡| 国产做人女色色‘视频| 欧美激情视频专区| 欧美亚洲日本熟女| 91久久人人爽澡人人澡中国 | 日韩手机在线观看| 看真人视频一一级毛片| 国产真实乱子视频网站| 人妻系列在线播放无码| 自拍三级日本乱伦| 国产91久久精品一区二区字幕| 国内老熟妇乱子伦视频精品人妻人人做人人爽夜夜爽 | 精品无码久久久一区二区三区| 天堂v亚洲国产第一次| 欧美日韩在线免费观看网址你懂的 | 久久精品国产亚av无码四区| 欧美日韩三在线中文字幕| 污污网站在线观看视频| 丁香亚洲激情五月| 色屁屁www欧美激情在线观看| 色五月激情五月亚洲| 国产偷v自v视频| 久久久久久久久久久久久久久伊免| 国产免费AV一区二区三区四区| 99在线热只有精品6| 国产又黄的A级鬼片V片大全| 这里只精品热在线国产| 噜噜色狠狠色粉嫩AV| 视频一区美女亚洲制服| 高清有码巨乳日本在线| 亚洲日韩另类天天更新等| 亚洲精品一木道AV日韩国产| 成色p31s是国精产品吗| 快频道在线播放国产精品| 一本久道AV无码专区加勒比| 国产日本视频| 久久婷婷人人澡人爽人人爱| 欧美激情视频一区二区不卡国产| 老司机国内精品久久久久| 精品国产亚洲二区| 久久精品国产亚洲AV黑人| 免费av网站网址在线观看| 人妻无码一区二区三区免费视频| 91精品免费观看视频| AV青春网青青草一区二区在线| 永久免费中文字幕| 岳乱妇乱第24集| 经典久久国产毛片| 黄色成人影院亚洲欧美a| 人妻少妇看a偷人无码精品视| 国产午夜波波视频在线观看| 国产美女模特在线第一页| 国产精品久久婷婷六月| 亚洲精品久久AV无码一区二区| 成人午夜高清在线视频| 欧洲乱码伦视频国产| 一级毛片久久久久久女人免费操| 男破女处身过程视频国产| 毛片视频一区二区| 视频一区美女亚洲制服| 茄子短视频成年版app下载| 91色伦在线视频色女| 国产精品免费理论在线观看| 午夜精品久久成人| 日本aa一区二区| 日本性色精品一区二区| 中文字幕大全浪潮av乱码 | fuli.su黑料正能量入口| 亚洲日韩精品看片无码| 亚洲午夜精品区午夜亚洲 | a级国产乱理伦片在线观看99 | 久久久久国产毛片一级版| 久久无码高清一区| 成人在线观看国产一区| 性色在线视频| 成人无码黄动漫在线播放| 中国特级毛片| 日日操免费视频| 精品动漫在线观看不卡日本| 日韩人妻少妇久久97人妻| 國產精品中文久久久久久久 | 日本一区二区在线免费| 亚洲高清专区日韩精品95| 亚洲国产日产久久高清欧美一区WW | av在线播放国产精品| 午夜香吻免费观看在线播放| 国产成人大综合在线直播| 中國日韓歐美中文日韓歐美色 | 超长无码AV片不卡| av在线播放国产精品| 欧美亚洲日本熟女| 免费无码AV爱情动作片国产| 亚洲天堂一区二区av| 淑女人妻中文字幕| 最近2024中文字幕免费看在线 | 亚洲视频每日更新免费| 日韩欧洲精品无码av| 高潮抽搐流白浆视频在线观看| 国产美女精品久久久久| 香蕉视频 污视频| 國產成人綜合久久精品推最新| 一站式观看久久精品| 又色又爽又黄的视频免费看 | 在线看片日韩午夜视频免费播放| 中日无码av中文| 色情少妇潘金莲三级本| 强伦中文字幕在线| 免费的欧洲一级无码视频| 午夜影视日韩一级黄片| 国产偷自视频一区二区三区av| 污污视频在线勉费观看| 最?好看最新中文字幕2019最新資訊| 一级免费国产片| 日韩欧美中文字幕免费第一页| 欧美国产亚洲日韩| 美日韩综合精品一区二区在线观看| 草莓视频在线观看免费视频| 亚洲一区自拍高清亚洲精| 男女一级a爱做视频| 正在播放刚结婚的少妇| 成人女人免费毛片视频| 日韩精品中文在线一区二区| 欧美人与动牲猛交xxxxbbbb| 茄子下载污免费下载| 污污污网站在线观看91躁| 中文字日产幕乱五区| 蜜桃av无码免费看永久亚洲AⅤ永久无码精品 | 久久天堂网国产精品| 好好的在线观看视频| 又粗又大又黄又硬又长的网站| 欧洲M∨日韩M∨国产无限观看| 一级a性色毛片久久无码| 琪琪午夜伦伦a片在线播放| 亚洲一区精品伊人久久| 男妓用舌头舔我高潮不退小说| 人成欧美高清狂热视频 | 靠视频大全视频免费国产| 国模叶桐尿喷337p人体| 国产网红主播午夜福利免费| 蜜臀久久精品国产亚洲av| 国产成人久久综合二区| 亚洲AV乱码一区二区三区林| 久久国产精品波多野结衣?V | 男女啪啪进出阳道猛进| 强奷表妺电影bd高清云播| 一点都不卡国产中文视频| 亚洲精品欧美精典在线观看| 97超碰人人爱国产資源免費看| 亚洲AV无码精品国产成人.. | 午夜精品第一区偷拍盗摄 | 久久av这里只有精品| 无码少妇诱惑视频| 免费的欧洲一级无码视频| 91色伦在线视频色女| 国产精品亚洲视综合区| 亚洲欧洲无码久久αv影院| 国产老妇伦国产熟女老妇| 国产av日韩精品一区二区| 变态free另类欧美hd| 国产欧美一区二区三区免费不卡在线| 国内永久福利在线视频| 亚洲黄网在线| 91模特在线观看免费视频| 国内一级高清性爽A毛片| 欧美亚洲日本图色| 91在线精品免费| 欧美日韩一区二区三区影视 | 国产鲁鲁视频在线观看鲁阿鲁| 欧美 日韩 国产一产| 国产黄色视频观看| 在线无码免费网站永久app| 亚洲无线码一区国产欧美国日| 一女侍七夫巨h双修| 在线观看艹草草| japanesehd日本乱厨房| 手机看片久日韩| 欧美日韩精品一区二区在线每天更新| 亚洲欧美变态另类综合| 鐘祥振動(dòng)電機(jī)| 一级毛片一级片电影| 国产午夜影院操一操| 费观看视频无码图片| 国产泄欲在线观看| 调教男男Gay打光屁股小蓝网站| 欧美熟妇精品一区二区蜜臀视频| 日本一级在线播放免费观看| 亞洲歐美日韓一區成人| 香蕉伊在线视频观看| 亚洲五月六月丁香缴情久久| 福利 无码 日韩| 国产 福利 小视频| 男女18一级大黄毛片免| 国产精品欧美Aⅴ| 精品人人搡人妻人人玩A片| 无码中文字幕亚洲日韩| 精品在线视频亚洲| 亚洲黄网在线| 国产精品v欧美精品v日韩精品心得| 亚洲精品精品一线久久| 国产精品久久人人添| 色欲av永久无码一区二区| 中文无码视频网址| 久久久免费观看| 亚洲午夜精品区午夜亚洲| 日本成人黄色视频在线| 国产精品一级毛片无码老人 | 中文精品日韩网站在线观看视频免费| 日韩在线视频欧美一区| 欧美综合自拍中文| 国产成人亚洲欧美在线观看| 肌肌桶肤肤软件下载大全| 亚洲人成网站在线播放观看| 无码4k国岛专区视频| 97久久人人爽人人爽人人| 亚欧乱色一区二区三区| 亚洲欧美日韩电影二区| 69精品麻豆久久久久| 好满射太多了装不下了APP搜狐| 水蜜桃视频免费观看视频等最新内容! | 涩涩视频在线免费观看| 日韩无码中出| 爆爽h全免费视频| 无码中国孕妇孕交视频在线看| 国产精品制服丝袜另类一区| 国产免费AV东京热| 亚洲无码在线色资源| 另类小说欧美视频| 久久精品色妇熟妇丰满人妻| 中字无码第2页| jizzon国产免费手机版安装| 北条麻妃大战黑人hd| 亚洲黄色av网址| 色哟哟在线网站观看| 成年片精品视频网站| 欧美视频二区在线观看免费| 欧美综合自拍中文| 131少妇爱做高清免费视频| 欧美激情精品久久| 欧美人成网站中文字幕| 亚洲中文字幕久久电影| 国产aⅤ久久免费精品| 亚洲A v无码专区电影在线观看| 欧美精品与人动性物交| japanese国产在线看| 天堂成人一区二区视频在线观看| 国产成人无码AⅤ片在线图| 茄子下载污免费下载| 天天干天天射综合网| 欧美三级日韩| 成年片精品视频网站| 黑人video粗暴日本野外| 国产在线一区视频免费观看 | 高清国产精品久久久久| 免费无码AV爱情动作片国产| 999精品视频在线观看免费| 人妻丰满熟妇av乱又伦| 老外橾女人免费网站| 亚洲欧美另类在线图片区| 亚洲午夜理论影院在线观看| 2021国产麻豆剧传媒精品| 国产揉捏爆乳巨胸挤奶视频| 公和我做好爽在线观看无码| 国产欧美日韩亚洲一分钟| 精品无码一级片在线看| 天天操美女逼| 任你躁国语自产一区在线播放 | 日韩在线精品论理视频播放| 久久精品国产亚洲AV黑人| 香蕉97超级碰碰碰免费公开18| 无码葵司精品一区二区三区99| 一级黄色片免费播放| 天天做夜夜爽视频| 欧美日韩在线免费观看网址你懂的 | 狠狠躁夜夜躁av网站色| 久久夜色国产av| 亚洲一区二区久久av| bt天堂在线观看国产| 激情三级无码一二三区视频| 日本免费一区二区久久久| 天干天干啦夜天天喷水妓女| 亚洲欧美日韩综合在线一起来看看吧!| 亚洲欧美在线另类| 国产福利一区二区精品视频資源免費看| 欧美日韩a精品| 天堂网2024亚洲系列亚洲系列 | 免费午夜福利影院| 午夜福利无码不卡一区| 欧美人妻另类首页| 欧美一区二区最爽乱婬视频免费看| 国产片在线观看你懂得| 爆乳国产一区二区三区91| 日本r级在线中文在线播放| 捆绑白丝jk震动捧娇喘视频 | 欧美视频二区在线观看免费| 91人妻人人爽人人添夜夜爽直播| 无码av在线一区二区三区四区| 日韩一区国产二区欧美三| 草久在线观看| 國產精品亞洲片在線觀看三區| 鉴黄师免费解锁版本| 免费国产乱理伦片在线观看| a夜夜爽88888视频免费看| 国产主播一区二区三区在线观看| 国产午夜视频频道久久一区免费| 国产亚洲经典在线观看| 在线看片无码永久免费a| 91久久综合精品五月天| 亚洲在线免费观看高清视频| 国产成人亚洲综合91精品| 国产精品视频分类精品2| 黄片免费在线观看国产| 2018中文字幕欧美| 三年片高清免费观看完整版| 人妻中文字幕无码网| 靠视频大全视频免费国产| 亞洲歐美日韓在線不卡中文| 成a人片在线观看久国产| 九九免费高清中文字幕mv| 成人纯肉动漫在线播放| 欧亚美日韩中文字幕8页| 主播福利视频一区二区三区| 欧美XXXXX牲另类人与| 国产免费AV一区二区三区四区| 精品久久懂色av| 精品视频一二三四区导航| 亚洲精品导航在线网站观看| 领导玩弄娇妻呻吟声不断视频| 欧美做爰无码av片横特走秀| 国产精品无码?v在线播放| 操女人一区二区三区| 久草综合电影片| 精品视频一二三四区导航| 国产灌醉系列闺蜜| 亚洲国产精品美女久久久久| 一区二区三区日韩欧美国产| 一点都不卡国产中文视频| 太大了吧唧吧唧吧唧吧唧| 久久综合色天堂av| 精品久久久久久中文字幕无码一本| 国内精品免费久久久久软件| 少妇一级婬片50分钟| 99精品国产乱码久久久| 在线国产公开视频| 精品人妻中文无码av在线| 日韩一区二区三区无码专区| 亚洲高清无码中文字幕| 99精品网免费播放| 91在线国产观看| 九九精品久久久久久噜噜| 国产日韩新片无码免费| 日本小视频网站色版在线观看| 欧美黄色三级| 曰本一区二区三区片视频| 91乃黄色免费看| 青青青国产免a在线观看| 激情婷婷九月天| 日韩一区二区丰满人妻在线不卡 | 性一交一乱一交一精一品| 黄色三级av网址| 中文字幕亚洲色图久久| 制服丝袜中文字幕久久久| 18成禁人视频打屁股免费网站| 国产精品一区二区蜜臀久久| 中文字幕一区三二区三四区| va亚洲中文字幕无码| 无码黄片大全在线观看| 欧亚美日韩中文字幕8页| 一级欧美电影婷婷看看| 黄色三级av网址| 日韩欧美一区二区久久| 韩国三级理论电影天堂网| 国产裸体美女无遮挡免费看网站| 91在线国产观看| 久久视频这里只精品亚洲| 日韩视频一区二区三区电影在线 | 羞羞视频免费网站| 精品人妻一区二区三区蜜桃| vr欧美日韩国产va另类| 亚洲天堂欧美天堂自拍偷拍| 羞羞视频免费网站| 国产大学生灌醉在线观看| 国产午夜在线一区| 精品国产免费Av无码久久久| 国产91免费观看在线直播| 亚洲国产精品久久久久72| 日韩无码中文短视频| 国产精品无码一区二区三区电影| 亚洲人成网站在线播放观看| 日本三级欧美三级人妇英文| 久草综合电影片| 国产又黄又粗又长色网视频| 国产免费不卡一区在线视频| 日韩a级片视频| 欧美videos另类hd肥妇色| 成本人在线观看视频网站| 亚偷熟乱区视频在线观看| 久久久精品综合网| 精品久久久久AV电影| 曰本a级毛片永久在线| 在线免费观看国产自慰| 亚洲成年人啊啊aa在线观看| 春宵福利导航院影| 卡通动漫综合一区亚洲| 艳妇性饥渴短篇小说| 近亲乱中文字幕久热| 中文字幕亚洲综合久久2025| 91中文字幕免费视频| 一本大道视频在线色综合| 99國產精品99久久久久久 | 国产在线精品自偷| 手机在线无码国产| 水蜜桃视频免费观看视频等最新内容! | 国产精品乱码高清在线观看互動交流| 欧美亚洲国产目韩成人综合| 蜜桃av无码免费看永久亚洲AⅤ永久无码精品| 免费∨a不卡国产高清大片在线 | 日韩中文人妻无码不卡| 日韩精品成人性视频在线| 日本欧美内射在线观看| 精品无码人妻视频一区视频二区| 视频一区二区三区av天堂| 国产生活片免费在线观看| 亚洲日本精品污污污在线| 亚洲国产精品一区二区三qu| 国产依依视频在线观看| 无码少妇诱惑视频| 日韩国产欧美| 久久91久久91色欲精品| 最近2019年免费视频播放| 禁无遮挡羞羞污污污污网站| 欧美亚洲日本图色| 海外无码影院视频在线| 精东传媒vs天美传媒电影| 久久久精品一二三区| 国产午夜影院操一操| 欧美日本精品国产网址| 日本欧美内射在线观看| 国产精品免费理论在线观看| 免费的欧洲一级无码视频| 国产综合内射日韩久| 国产又黄的A级鬼片V片大全| 禁无遮挡羞羞污污污污网站| 在线看免费观看日本特黄一级| 日韩aⅤ无码大片无码软件| 国产精选二区91| 亚洲人成欧美中文字幕午夜| 肥臀熟妇高潮一区二区三区| 久久久久国产毛片一级版| 看女生逼逼的软件| 国产成人无码AⅤ片在线图| 国语的ZOOFILIA杂交VIDEOS新| 亚洲成a∨人片在无码| AV在线播放一区二区三区| 被两老头添高潮了A片| 亚洲狠狠久久综合一区二区| 在线观看免费av的网址| 色综合久久一个色| 在线观看免费肉片aⅤ视频| 午夜av福利在线播放| 中文字幕在线免费| 后进圆润翘臀极品大屁股| 日韩欧美一区二区国产| 伊人蜜芽97碰碰碰视频观看| 日本一区二区三区电影在线观看| 日韩青草青草久热精品视频在线网站乱码 | 国产凹凸在线视频一区| 日韩亚洲欧洲美三区中文字幕| 国产亚洲成人网在线播放av| 人妻少妇伦在线电影不卡| 国产精品麻豆久久久久久无码专区 | 国产精品久久久久无码蜜三级| 高潮喷吹视频一区| 丰满少妇乱子伦精品无码专区| 姬小满狂飙乳液奖励自己 | 精品一区二区电影在线观看 | 精品人妻a片在线视频| 97超碰人人摸人人探| 亚洲 欧美 日韩中字幕 | free农民工熟妇丰满hd| 国产一级 片内射视频播放蘑菇| 国产裸舞在线观看直播| 国产一道本成人电影在线观看| 午夜国产手机在线观看| 国产精品久久久99| 国产午夜激无码aⅴ毛片久久| 国产欧美一区二区久久精品| 久久久久国产毛片一级版| 国产美女视频免费18| 999精品视频在线观看免费| {国产三级精品三级在线专区| 亚洲国产免费| 国产乱人激情在线观看| 色婷婷综合久久久久桃花| 亚洲成年电影在线播放| 看女生逼逼的软件| 国产黄色无码| 成人伦理在线观看国产| 无码人妻视频| a级毛片无码国产| 精品最新国内在线播放| 疯狂做受XXXX中文字幕| 91香蕉视频下载导航| 国产丝袜视频一区二区三区大长腿 | 国产美女遭强高潮网站观看 | 日一级做a爱无码性色永久免费| 国产福利一区二区精品视频資源免費看 | 三级黄手机在线看不卡一| 亚洲欧洲一区二区av色影| 亚洲午夜av影视| 天堂在线亚洲视频| 国产网红主播午夜福利免费| 香港三级日本三级之无毒不卡| 导航免费福利视频黑人| 欧美日韩三在线中文字幕| 精品久久久久中文字幕人妻| japanese国产在线看| 精品推荐国产精品店| 亚洲AV乱码一区二区三区林| 成品网站W灬源码三叶草下载| 香蕉国产美女久久精品69| 女人高潮叫床声48秒mp3| 欧美精品黄页在线视频免费| 婷婷色播电影| 精品农村av毛片一区二区三区| 狠狠躁夜夜躁av网站色| 免费看一级黄色片| 男女啪啪视频一区二区三区| JAPANESE国产高清在线观看| av在线播放国产精品| 乌克兰精品一级毛片| 惠民福利精品无码国产一区二区三区麻豆| 亚洲欧美成人无码久久久| 深夜免费福利| 免费国产特级黄色片| 伦理午夜福利视频| 欧美成人精品第一区二区三区日韩码一码二码三码区别69 | 国产一级刺激久久久毛片| 草草影院在线观看| 男女同房做爰全过程高潮| √天堂网www天堂在线资源| 99在线观看一道本视频二区| 亚洲欧美偷国产精品一区| 丁香亚洲激情五月| 在线播放高清视频www| 99久久这里只有精品不卡| 国产激情一区二区三区小说| 国产一区二区秋霞| 91短视频污下载| 精品456在现播放| 久久精品視頻國產劇情| 亚洲成人福利精品一区二区三区| 亚洲 欧美 日韩中字幕 | 午夜精品久久久久久久99樱桃| 国产精品99久久久| 91绿帽黑人系列一区| 黑人一区二区三区无码视频 | 在线日韩精品中文字幕| 污app视频下载芒果APP| 天美传媒唐一涵视频在线看| 欧美日韩综合一二区| 欧美特色黄片免费在线观看| 亚洲中文字幕在线观看色网视频 | 91国产丝袜在线播放动漫| 久久久久人妻精品系列| 色午夜午夜高清免费视频| 停电了被男同桌狂揉我奶胸动态图| 国产亚洲成av人片在一线观看| 美女爆乳18禁久久流白浆| 亚洲精品成人A v在线| 亚洲AV日韩精品久久久久| 亚洲A v无码专区电影在线观看| 国产大片精品免费永久看nba| 国产精品久久人人添| 爱爱动态视频爱爱网| 在线日本妇人成熟免费a√| 特黄无码在现一区二区| 亚洲国产rv精品一区二| 国产主播一区二区三区在线观看| 成年免费大片黄在线观看免费一| 老熟女高潮一区二区三区影视| 精品视频一二三四区导航| 一区二区三区视频免费在线观看| 久久久久国產麻豆无碼av| 天堂网2024亚洲系列亚洲系列| 亚洲在线免费观看高清视频| 非洲一级毛片| 欧美一区二区三区视频视频| www免费视频在线观看播放| 在线观看艹草草| 女人下边被舔全过视频| 日韩亚洲制服丝袜中文字幕| 国产国拍亚洲精品永久69| 亚洲精品国产黄色片| 999精品视频在线观看免费| 少妇无码专区免费无码视频| 18无套内射免费网站| 日本加勒比一二三不卡在线观看| 日韩免费观看欧美| 好吊cao视频这里只有精品| 亚洲成熟丰满熟妇高潮XX| 91精品婷婷国产综合久久性色| 一区二区三区亚洲区| 久久综合久久一个色综合| av一本到久久免费| 无码一级午夜福利区久久| 久久久久久一级真人片免费野外| 一点都不卡国产中文视频| 久精品视在线观看亚洲欧美| 亚洲自拍偷拍无码| 黑人巨大的吊bdsm| 在线观看不卡视频一区| 天天射天天摸人人色| 涩视频成人永久免费观看网站| 东京热人妻丝袜AV无码| 日韩精品一区二区二区三区| 欧美尤物在线一区二区三区| 亚洲97一二三区| 一本不卡午夜视频在线播放婷婷| 国产A级艳片视频| 男女全黄一级带免费| 韩国三级《女教师》| 人妻无码系列:日韩专区| 蜜臀久久精品国产亚洲av | 国产午夜精品理论片a级探花| 在线观看不卡视频一区| 国产又色又爽又黄又刺激的网站| 亚洲精品大全寸在线看片 | 日本一区二区不卡高清下载| 日韩精品卡通动漫网站| 2016国产一区日本在线| 久久久无码精品免费播放| 精品人人搡人妻人人玩A片| 啊灬啊灬啊灬快灬深用两性| 色情无码WWW视频无码区| 亚洲中文字幕av无码一区| 国产欧美日韩小视频资源| 免费无码婬AAAA片在线漫画 | 亚洲国产中文亚综合在线欧美 | 午夜久久久久久亚洲国产精品| mm1313亚洲精品国产| 天天干天天插天天射| 特级视频免费在线播放| 国产成人亚洲精品一区二区在线看 | 乖灬舒服灬别拔出来灬视频| 精品国产99久久久久久影视| 久久精品免費一區二區三區| 韩国美女精品久久久久久| 经典肥岳短篇系列小说推荐 | 日韩经典电影在线观看亚洲福利| 91久久综合九色综合欧美98| 尤物精品资源YW193网址| 国产福利一级视频| vr欧美日韩国产va另类| 任你躁国语自产一区在线播放 | 精品久久久久久中文字幕无码一本| 免费看片一级无码福利| 日韩视频精品动漫一区| 久久天天先锋影视| 亚洲男人插女人在线观看| 免费黄色网址在线观看| aaa级一级国产毛片| 91精品综合久久久久香蕉健身房| 在线免费国产视频网站| 天堂国产精品一区| 国产一区二区三区肃南♀| 亚洲国产欧洲综合| 国产福利精品导航网址| 91精品国产综合久久麻豆| 在线观看国产高清视频茄子| 国产欧美日韩综合亚洲| 欧美亚洲伊人久久综合| 日韩毛片精品视频 | 午夜影片在线人成免费| 99久久2023re6热精品首页| 被窝视频在线观看| 日本一级在线播放免费观看| 偷老熟妇和小XXXX视频| 牛牛影视ac精品视频| 精品人伦一区二区三区| 一级欧美电影婷婷看看| 三级黄手机在线看不卡一| 免费人妻无码不卡中文字幕系列| 国产真人一级片久久www免费人成一看片| 亚洲中文久久精品中文字幕| 成人在线观看国产一区| 亚洲精品欧美精典在线观看| 免费av观看在线亚洲| 米奇影院日韩免费| 欧美亚洲日本久久久久久| 一级毛片女人视频| 国产小电影在线播放| 日韩欧洲精品无码av| 国产香蕉在线777| 中文乱码字幕在线观看播放| 99久久久精品免费观看国产麻豆| 把腿叉开我插一下视频| 男人的天堂不卡无码| 曰本a级毛片永久在线| 99久久婷婷國產一區二區| 国产午夜在线一区| 亚洲国产中文日本成人在线| 在线观看免费的AA片| 天天躁日日躁狠狠躁欧美老妇不卡| 亚洲免费美女动漫精品二区| 奇米777在线视频| 免费无码AV爱情动作片国产| 国产日韩久久免费| 国产色AV一区二区| 欧美日韩a精品| 囯产一级α毛一级看免费视频| 无码播放一区二区精品视频久久久| 手机看片国产免费现在观看| 国产黄桃AV一区在线观看| 久久久久9韩国三级精品一区| aaa成人永久在线观看视频| 国产精品亚洲视综合区| 久产久人精午夜精国 | 亚洲午夜精品在线| 日韩一区二区三区在线精品| 久久精品国产亚洲?V无码不 | 91中文字幕免费视频| 免费A级毛片18禁网站APP| 免费播放国产性色生活片| 亚洲春色国产欧美一区二区 | 欧美激情无限日韩亚洲国产| 又大又粗j进女人的免费观看| 中国色拍精品偷窥老妇| 国产成人欧美不卡一区二区三区| 欧美亚洲日本熟女| 水蜜桃视频免费观看视频等最新内容! | 国产大学生灌醉在线观看| 国产精品综合日本欧美| 久久AV最新网址| 2020最新伊人日韩中文字幕| 性夜影院爽黄A爽免费看| 国产精品自拍va从这里开始| 亚洲国产日产久久高清欧美一区WW | 91精品无码国产自产拍在线| 国产日韩欧美亚洲第一| 爱爱小视频免费体验区在线观看| 免费在线一级片电影| 日韩精品中文无码一区| 18禁止的网站黄污污| 无码三级少妇精品| 深夜成人无码免费播放| 国产成人AV无码永久免费| 欧美成人精品电影在线观看| 日韩aⅤ无码大片无码软件| 两性色午夜视频免费网| 亚洲午夜精品一区二区免费看| 影音先锋男人一区二区资源站| 少妇高潮一区二区三区9| 国产黄片高清一区二区三区| 少妇性l交大片免费| 亚洲中文少妇三级| 國產歐美另類久久久精品圖片 | 看高清美女毛片一区二区三区| 91色伦在线视频色女| 午夜男女视频一区二区三区| 日韩青草青草久热精品视频在线网站乱码 | 午夜影视免费x看| 精品久久久久AV电影| 国产a一级无码毛片一区| 鉴黄师免费解锁版本| 亚洲欧美变态另类综合| 97人人揉人人捏人人添电影| yyy144永久免费观看| 欧美午夜精品久久久久久久久| 亚洲日本一区二区三区精品| 亚洲国产中文日本成人在线| 亚洲欧美日韩国产三级| 亚洲呦呦不卡无码在线观看| 亚洲精品素人在线观看| 免费av网站网址在线观看| 免费人成在线视频无码高清| 精品囯内在线观看| 精品少妇无码专区喷水视频| 青青草国产在线精品香蕉| 成人免费毛片一区二区三区| 两个人日本的视频全免费| 国产美女视频免费18| 欧美日韩三在线中文字幕| 亚洲乱码AV鲁丝一区二区三区在线观看 | 亚洲三级毛片免费在线视频| 男人与女人做爱视频| 男女高潮吃奶添下面动态图| 男男禁漫画bl网站入口| 波多野結衣av一區二區三區中文| 欧美激情在线播放欧美吧| 人妻无码系列:日韩专区| 欧美日韩精品区久久久| 亚洲欧美日韩电影二区| 亚洲清纯自偷自拍另类专区| 中國日韓歐美中文日韓歐美色| 斗鱼虎牙叫床娇喘视频| 亚洲欧美日韩综合在线一起来看看吧!| {国产三级精品三级在线专区| 午夜在线看日韩精品一区二区三区| 在线观看黄片欧洲 | 亚洲欧美偷国产精品一区| 456日本熟妇奶水视频| 日产一一到六区网站免费| 国产午夜一区二区三区嘿嘿嘿| 亚洲国产精品久在线| 国产精品资源网站视频| 日韩成人网址播放视频在线播放免费| 国产亚洲欧美午夜| 亚洲日本乱码熟妇色精一二| 免费国产乱理伦片在线观看| 久久亚洲国产精品夜夜嗨| 国产精品久久久久久无码AV草莓| 国产成人精品亚洲一区| 中文乱码字幕一二三视频| 人人摸人人爱日木| 无码av在线一区二区三区四区 | 亚洲爆乳成av人在线| 亚洲成av人在线视达达兔尤物| 国产高清视频?在线观看| 国产成人久久综合二区| 亚洲中文字幕av无码一区| 亚洲日本在线有码| 午夜精品亚洲欧美一区二区| 自慰免费精品国自产拍网站| 日韩精品第十八页| 日本护士高清xxxx视频| 男男猛烈无遮挡床震视频| 日本公与熄乱理在线播放| 免费无码又爽又刺激高潮视频男 | 国产亚洲欧美激情电影一区| 老子影院在线观看理论片| 蜜桃精产品二三三区| 国产精品九九九九九九九九九| 欧美性爱黄色一级录像| 成人精品中文字幕有码| 把腿叉开我插一下视频| 国产白丝护士喷白浆视频| 人妻日韩AV中文不卡在线| 免费国产一级黄色| 4399勉费黄色网站| 无码中文字幕乱码二区| 想看中国本地的美女自慰大片| 99久久精品午夜一区二区无码版| 在线看免费观看日本特黄一级| 欧美亚洲中文字幕在线| 毛片a精品**国产| 榴莲视频污在线下载| 亚洲三级毛片免费在线视频| 久久露脸国语精品国产下载| 白丝裤袜灌浆脚交av免费观看| 无码国内精品久久综合88| 免费久久99精品国产自再现| av中文字幕在綫亚洲| 国产jk白丝自拍视频在线观看| 91亚洲视频在线播放| 精品一区二区三区在线免| 惠民福利亚洲欧美日韩高清一区二区三区 | 2021国产精品每日更新在线观看| 男人天堂视频在线免费观看| 一本大道视频在线色综合| 中文字幕视频一区二区三区视频| 高清不卡一区二区三区| 日本一区二区在线免费| 中文字幕亚洲色妞精品天堂| 成年女人VR免费视频| 最近2019年免费视频播放| 国产真实孩交| 美丽人妻中出| 亞洲卡一卡二卡三新區| 日本在线成人一区二区| 再深点灬舒服灬太大了好硬好爽| 午夜久久久久久亚洲国产精品| 国产精品白丝无码ThePorn| 亚洲成vr人片在线观看| 亚洲高清中文字幕精品| 草莓污视频是一个聚合了草莓视频免费观看 | 乱视频伦裸人| 人人干人看人操插免费在线| 日本亚洲色大成网站WWW久久| 91中文字幕免费视频| 欧美丰满色妇高潮| 无码狂躁久久久久久老妇色欲| 日本乱码一区二区三区不卡| 无码人妻精品一区二区三18禁| 天堂国产精品一区| 囯产熟女视频精品免费看| 日本小视频网站色版在线观看| 91短视频污下载| 国产av日韩a∨亚洲av麻豆| 国内熟女精品熟女a片小说 | 日韩在线中文字幕一区 |