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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