Chery S11 / Chery QQ. Manual — part 30

Chery QQ Service Manual Chassis System

support with two bolts. When
applying brake, the fluid pressure
in rear caliper piston will
increase. The pressure acts on the
bottom of piston and cylinder and
transfers to lining in order to
push the surface of brake disc.
Caliper will slide on mounting
bolts to the center of vehicle.
with setting up pipe pressure, the
pressure on disc surface is higher

and higher to stop vehicle. When
loosing brake pedal, pipe
pressure will release. The
piston will be back slightly. The
movement

of

piston

will

compensate the wear of lining.

Section three Shoe brake

1.Specifications

Spare part

Application

Specifications

wheel cylinder piston diameter

19.05mm

Brake drum breadth

28mm

Brake drum diameter (new)

200mm

Finishing brake drum diameter

201mm

Maximum allow eccentricity

0.1mm

Brake lining diameter(rivet)

0.5mm

Tautness fasteners

Application

Number value

Rear brake bottom plate bolt

50Nm

Wheel cylinder bolt

10Nm

Wheel cylinder linkage

16Nm

Exhaust valve

8Nm

ABS left wheel sensor bolt

6Nm

2. Service guide

1)Brake scrape gasket check

Check brake lining when driving

every 1.5000km.

Check lining when removing wheel

and tire.

Remove the rubber cock on check

hole of lining.

Check the thickness of lining.
Whenever the wear of lining depth

exceeds 2mm, replace new lining. If
fixing lining with rivet, when wear
exceeds 0.5mm, replace new lining.

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Chery QQ Service Manual Chassis System

2)Brake scrape gasket replace
Disassembly procedure
It recommends to use lining or other
pats produced by Chery to keep
front/rear brake function. The brake
parts produced by Chery are selected
carefully to offer best brake
function.
1. Support and lift vehicle.
2. Mark the wheel position to the hub.
3. Remove tire and wheel.
4. Remove brake drum.
5.Remove park brake cable.
6.Remove return spring with spring
caliper.
7. Remove spring and spring support
with screwdriver.
8. Remove regulative lever.
9. Remove spring and pins.
10.Remove lining.
11. Must remember to remove all linings
on same shaft.
Steps of installation
1. Clear surface of brake plate.
2. Use soft cloth as shown in the
figure.
3. Connect park brake cable and park
brake lever.
4. Install lining, spring and spring
reed.
5. Install the returning spring and
brake hoof.
6. Make sure the correct position of
the cable as shown in figure.
7. Install slide lever regulator
between two linings.
8. Install small washer on new lining
as shown in figure.
Points of attention: Make sure the
small washer is mounted on lining,
otherwise it will cause to damage brake
or brake malfunction

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Chery QQ Service Manual Chassis System

9. Mount regulating support with

spring to pins.

10.Install the support spring.

11.Install return spring with spring

caliper.

12.Install brake drum.

13.Adjust clearance of drum bearing.

14. Adjust clearance of lining. Apply
brake 10-15 times to make sure the
clearances are correct.

Attention: Stepping down brake pedal
hard several times could adjust the
clearance of lining automatically.
15. Install tire and wheel.
16. Mark the original labels on wheel
and drum.
17. Drop vehicle.
18. Fill brake fluid to suitable level.
19. Grind lining and drum.

3) Gasket brake drum run in

Finish new surface of disc after

replacing linings.

Run in the surface of new brake drum

after finishing or replacing brake
drum.

Brake 20 times at 48km/h to run in

new braking surface.

Step down the pedal with the force

gradually. Avoid over heat of
brake.

Attention: Avoid sharp brake in
driving 200km after replacing new
lining.

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Chery QQ Service Manual Chassis System

4) Left brake replace
Disassembly procedure
1. Fill fluid to MAX level.
2. Lift and support vehicle.
3. Mark the position of wheel to the

drum.

4. Remove tire and wheel.
5. Remove brake drum.
6. Remove park brake cable.
7. Remove brake cable
8. Remove brake pipe on rear shaft.
9. Remove sensor on rear ABS.
10.Remove 4 bolts on rear brake.
11.Remove rear brake.
Steps of installation
1. Clear and check wheel shaft
surface.
2. Fix rear brake plate and rear brake
with new bolts.
Screw bolts with torque 50N.m.
Caution: Don’t use old bolts.
3. Install park brake cable
4. Mount brake pipe bolts on rear brake
wheel cylinder
Fixture
Screw brake pipe bolts to 6 N.m.
5. Install rear vibration absorber
bolts.
Fixture
Screw bolts to 65Nm.
6. Install brake drum.
7. Install rear sensor of ABS on rear
brake.
Install and adjust sensor
Install sensor and screw bolts with
hands.
Push the sensor until cannot move.
Screw bolts.
Turn clockwise 30 degree to adjust the
lever.
Fixture
Screw bolts to 6Nm.
8. Fill clean fluid to suitable level

9.Drain out air in the brake if removing
connector on inlet
10. Step down the pedal with 220N after
draining out air if necessary.
11. Check if any leak of fluid in brake
system.
12. Install tire and wheel.
13. Lower vehicle

5)Brake wheel cylinder overhaul
Disassembly procedure
1. Remove brake cylinder.
2. Remove cylinder hood.
3. Remove cylinder piston. Blow
compressed air to inlet of cylinder,
the piston will putout from hood.
4. Clear all parts with alcohol.
Don’t use other liquid.
5. Check if cylinder and piston is cut,
scratch, corrosion or wear.
6. Replace cylinder shell or piston if
any above condition appears.
7. Remove piston seal ring from

cylinder groove.

Attention: Don’t use metal tool to
remove seal ring, otherwise it will
damage cylinder or groove.
8. Check if scratch, nick, corrosion or
wear appear on cylinder or groove.
9. Use a fine sand paper to remove
slight corrosion.
10. If the corrosion cannot be removed,
replace wheel cylinder.
11. Check if cut, scratch or aging
appear on protection cover.
12. Replace damaged cover.
13. Check if cut and scratch appear on
groove. f the groove is damaged,
replace wheel cylinder.
14. Remove valve cover and valve from
cylinder.
15. Clean all parts with alcohol.
16. Dry all parts with clean compressed

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