Chery S11 / Chery QQ. Manual — part 187

Chery QQ Maintenance Manual Chassis System

cylinder.
Attention: If piston is damaged, it
must replace whole caliper.
Don’t scratch cylinder during
replacing.






















3、Use small wooden tool or plastic tool
to remove seal ring.
Attention: Don’t use metal tool to
remove. It will scratch cylinder or
seal groove.
4、Check if piston is cut, crack or wear.
Replace any damaged piston.
5、Check if cylinder or seal groove are
cut, crack or wear.
6、Use fine sands paper to polish slight
corrosion.
7、If the corrosion cannot be polished,
replace caliper shell.
8、Check if pin hood is cut, crack or
aging.

9、Replace old hood.
10、Check if caliper pins are corrosion
or damaged. Replace corrupt pins.
11、Check if caliper seal groove is
scratched. Replace new one.
12、Remove valve cover and valve.
13、Clean all parts with alcohol.
14、Dry all parts with clean compressed
air.

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Chery QQ Maintenance Manual Chassis System

6)Brake caliper bracket replace
Disassembly procedure
Points of attention:Don’t disconnect
hose from caliper. Don’t suspend
caliper on hose.
1、Remove caliper. See“ Remove
caliper”.
Warning: Replace all fixture parts if
they are loose or removed, otherwise it
will cause personal hurt or vehicle
damage.
Points of attention:New caliper bolts
have been smeared bolt seal glue.
2、Remove caliper support bolts.
3、Remove caliper support bolts.
4、Remove hood bolts and bush from
support.
5、Check if support is broken.
6、Replace new support if necessary.
Steps of installation
1、Use lubricant to lubricate parts.
2、Install following parts on support.

Bolt protector
Bush

3、Screw bolts to fix caliper support.
Fixture
Screw torque: 165N.m.
4、Install caliper. See “Rreplace
brkae caliper”.

7)Brake disc replace

Disassembly procedure
1. Support and lift vehicle.
2. Remove tire and wheel.
3. Check the thickness of brake disc.
4. Remove brake caliper.
5. Remove caliper support.
6. Remove brake disc bolts and brake
disc.
7. Clear interface between the disc and
the wheel hub flange.
Steps of installation
1. Install brake disc
2、Install the disc bolts.
Fixture
Screw bolts to 6 N.m.
3、Install caliper.
4、Install caliper support.
5、Install tire and wheel
6. Lower vehicle

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Chery QQ Maintenance Manual Chassis System

8)Brake disc surface finishing
Points of attention:Don’t finish
disc to correct followingconditions:

Brake noise.
Early wear of lining.
Surface corrosion.
Disc fade.

Only finish surface on one of following
conditions:

Serious scratch on surface of disc

with depth of 0.4mm.

The hop caused by following

reasons:

——The deviation of disc depth

exceeds 0.01mm.

——Corrosion or scratch depth

exceeds the surface of disc.
Attention: Whenever to remove the disc
from wheel flange, the corrosion or

dirt on disc or flange face must be
cleaned, otherwise it will cause
serious hop.
1、Clear the wheel bearing and hub.
2、Use micrometer to measure the
thinnest point on disc. If the
thickness of the point exceeds the
minimum thickness of disc, don’t
finish surface of disc. Replace disc at
once.
3、Clear completely the corrosion on
flange.
4、Finish thwe disc.
Points of attention:If the best
surface finishing could not be reached,
it will cause bad brake ability.
5、After machining the disc, use alumna
to get unidirectional surface.
6、Clean surface with suitable cleaning
fluid
Attention: Loose wheel bolts will
cause brake hop or damage. Screw wheel
nuts to specified torque to avoid
expensive service for brake system.

4. Description and operation

Disc braking system
Points of attention:

Use clean fluid to lubricate all

rubber parts for better
installation.

Don’t use compressed air with

lubricant.

Whenever to remove hydraulic parts,

drain out all air in system.

Replace whole lining assembly.
Fix dry parts in specified torque.

Operate on clean working desk.
The caliper has a single cylinder.
The caliper is mounted on the

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Chery QQ Maintenance 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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