Chery SQR 7160 sedan. Manual — part 82

CHERY AUTOMOBILE CO., LTD Automatic Transmission Fault Diagnosis Manual

Oil leaking fault

sing and connect the

2.

ed or not;

.

Step down the brake pedal with the left foot.

ect idle RPM.

wn the throttle pedal and detect the oil pressure at the speed listed

ct the oil pressure when the control handle is pulled to position R.

Parameter

Oil pressure inspection procedure

.

Oil pressure test.

Oil pressure test procedure:

1.

Remove the plug for the main oil circuit’s side compression hole on the transmission hou

oil gauge.

Inspect whether the four wheels are align

3.

Pull on the manual brake lever.

4

5.

Start the engine to insp

6.

Pull the control handle to position D, step do

in the table beneath.

7.

Similarly, dete

Item

P，N，D，3，2，1 7～10kg/cm２(995～1421psi)

Oil pressure

Idle

R

10～12kg/cm２(1421～1706psi)

D

10～13kg/cm２(1421～1848psi)

Stall

R

10～12kg/cm２(2274～2843psi)

Stall test

Note: The stall test should not last for more than 5 seconds. Inspect the engine’s stall RPM when the control handle

.

Inspect whether the four wheels are aligned or not;

e lever.

3.

oot, step the throttle pedal to full with the right foot. When

is pulled to position P and R.

Check stall RPM.

1

2.

Pull on the manual brak

Step down the brake pedal with the left foot.

4.

Start the engine

5.

While stepping down the brake pedal with the left f

the engine’s RPM does not rise any more, read rapidly the engine RPM at that time;

Stall RPM: 2100+150rpm

6. Similarly, detect the stall RPM when the control handle is pulled to position R:

Stall RPM: 2100+150rpm

Item

Parameter

When at position D

2100±150rpm

When at position R

2100±150rpm

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CHERY AUTOMOBILE CO., LTD Automatic Transmission Fault Diagnosis Manual

Fault diagnosis:

Fault description

Possible causes

Too low RPM when at position D and R

The engine does not have enough power.
The one-way clutch of the converter’s guide roller slips.

Too high RPM when at position D

The drive gear oil circuit’s pressure is too low.
The drive clutch slips.
The 1

st

clutch does not work normally.

Too low RPM when at position R

The back gear oil circuit’s pressure is too low.

h (clutch B) slips.

(clutch D) slips.

The back gear clutc
The back gear brake

Tow high RPM when at position D and R

The main oil circuit’s oil pressure is too low.

Oil leaking position inspection

General inspection method:

1.

, inspect whether the transmission leaks or not.

2.

the suspected part of leaking.

3.

℃.

4.

5.

f the engine and find the point of leaking.

6.

repair.

Powder inspection method:

1.

the suspected part of leaking.

2.

, such as dust, on the suspected part of leaking.

3.

℃.

4.

f the engine

5.

nd find the leaking point along the powder trace.

6.

repair.

Once

e leaking point is located, you will determine the reason and then repair. Please refer to “Leaking Fault

Maintenance” for analysis of specific problems.

Firstly

Clean thoroughly

Run the transmission to normal operating temperature: 88

Park the vehicle in a clean place and run for a while.

Shut of

Make necessary

Clean thoroughly

Scatter a kind of powder

Run the transmission to normal operating temperature, such as 88

Shut of

Observe the suspected part of leaking a

Make necessary

th

39

CHERY AUTOMOBILE CO., LTD Automatic Transmission Fault Diagnosis Manual

Com

A

mbly’s service

Tr

level inspection

al operating temperature before fluid level inspection: 80℃.

Park the vehicle on leveled ground.

ote: The control handle must be pulled to position P when inspecting the fluid level.

P.

t the oil gauge and inspect the fluid level.

The correct fluid level must be between the minimum and maximum marks.

nging the oil, please use the recommended hydraulic fluid. Otherwise, it

aked circuit hose and sealing.

inimum mark, fill the oil from the oil pipe and inspect if

If the fluid level is higher than the maximum mark, the transmission is too full. Drain the oil

from the oil pan’s drain plug. Then inspect the fluid level.

mon oil leaking

Fault description

Fault diagnosis

Actions

The

ousing’s sealing gasket.

Replace the gasket.

torque converter leaks H

at its housing.

Cracks on the converter’s welding seam.

Replace the torque converter

It eaks at the contact The connecting bolt is loose.

l

Tighten the connecting bolt

surface between the
transmission and converter.
It leaks at the contact
surface between the

The oil pan’s connecting

transmission and oil pan.

bolt is loose.

Tighten the connecting bolt
Replace the oil pan, if necessary.

The side cover’s gasket is loose.

Replace the gasket.

It
su

leaks at the contact

rface between the

sion and side cover.

The side cover’s connecting bolt is loose.

Tighten the side cover’s connecting
bolt.

transmis

The side cover’s gasket is damaged.

Replace the side cover gasket.

It leaks at brake C’ and the

aulic cylinder head

Defective O ring on the cylinder head.

Replace the O ring

hydr

.

.

It leaks at
adjusting bolt.

the brake band’s

Defective O ring on the brake band’s push
rod

Replace the O ring.

The positioning bolt is loose.

Tighten the positioning bolt.

It lea at the driven shaft
bearing’s outer race
positioning bolt.

Defective sealing ring

Replace the sealing ring.

ks

It leaks at connection of the
air throttle’s cable.

Defective O ring at the joints.

Replace the O ring.
Replace the air throttle cable, if
necessary.

It leaks at the differential.

Defective oil sealing at the input shaft.

Replace the input shaft’s oil sealing.

Defective O ring

Replace O ring.

It lea

the housing of the

odometer drive gear.

The connecting bolt on the housing is loose.

Tighten the connecting bolt. .

ks at

Defective O ring

Replace O ring.

It leaks at the seat of the
odometer’s driven gear seat. The seat plug is damaged.

Replace the rack.

The fluid level is too high.

Adjust fluid level.

It leaks at the throttle.

The oil grade is not correct.

Drain the oil. Use the correct
hydraulic fluid. Replace the
transmission, if necessary.

It

efective shift shaft oil sealing

Replace the shift shaft oil sealing.

leaks at the shift shaft.

D

utomatic transmission asse

Service on the whole vehicle

ansmission fluid

Note: Preheat to norm

1.

N

2. Pull the control handle to position

3. Pull ou

4.

Note: when filling and cha

will lead to damaged or le

5. If the fluid level is lower than the m

there is any leaking.

6.

40

CHERY AUTOMOBILE CO., LTD Automatic Transmission Fault Diagnosis Manual

Oil changing

isassembly procedure:

Lift the vehicle

Place an oil box under the transmission to collect the oil.

Loosen the oil drain plug to drain the oil inside the transmission.

Loosen the oil pan’s connecting bolt and take off the oil pan and gasket.

Inspect if the oil pan’s flanged edge is twisted or deformed. If yes, align it.

clean oil pan, oil pan gasket and oil feed filter screen. Replace a new one if

and oil feed filter screen.

1.

ew gaskets.

Tighten the oil pan’s connecting bolt.

rque:15Nm

Lower the vehicle.

Fill in correct transmission hydraulic fluid.

Check the fluid level

Check if the oil pan leaks.

il feed filter screen and gasket

isassembly procedure:

Lift the vehicle

Remove the oil pan and gasket.

Remove the oil feed filter screen’s back cover, oil feed filter screen and gasket.

powder, cermet powder from the clutch’s surface, rubble

parti

matters from the engine coolant on the oil filter screen and oil pan. If yes,

nd out the reason and make necessary repair.

Please refer to “Position P—No power”, “Position R-no back gear”, “shift noise at the higher

eed”, “slow gearshift” and “oil pump suction noise” and other chapters for detailed analysis.

ssembly procedure:

Install new gasket, oil feed filter screen and filter screen back cover.

en back cover’s fixing bolt

Install oil pan gasket and oil pan

Lower the vehicle

Check the fluid level

D

1.

2.

3.

4.

5.

6. Use the detergent to

the used gasket has any damage.

7. Blow dry the oil pan, oil pan gasket

Assembly procedure:

Install the oil pan with n

2.

To

3.

4.

5.

6.

O

D

1.

2.

3.

Inspection procedure:

Check whether there are metal

cles, and foreign

fi

sp

A

1.

2. Install the filter scre

Torque: 8Nm

3.

4.

5.

41