Chery S11 / Chery QQ. Manual - part 37

  Chery QQ Service Manual                                                            Chassis System

 

8、Rim sections and tires non-circularity 
（1）Lift the car and support it securely; 
（2）Place the probe of the dial gauge on the rim 
section and measure the extent of non-circularity for 
each turning of a circle. 
Limit for non-circularity: Unit mm 

 

 

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Inspection on the tire non-circularity 

 

Longitudinal 1.5(0.06) 
Sideways 

2.5(0.10) steel rim section 
2.0(0.08) aluminum rim section

（3）Replace the tire if necessary                    

 
 

9、Readjustments of tire positions 

In order to extend the operational life of tires and to 

determine the tears and wears of the tires, readjustments   
of tire positions should be carried out for every 6,000km 
(3,750 miles) of driving. 

 

As shown in the Figure: 

                                                                                        Readjustment of tire positions 

Attention:                                                                     
* Best-quality tires must be used for the front wheels; 
* After readjustments of tire positions, make sure that the air pressures for the tires are 
adjusted to the specified air pressure values. 
 
 
10、Adjustment of tire balance 

After the tires are filled with air, fix the protective   

capsfor the air valve nozzles tightly and then make the   
testson dynamic balance. Place the balance blocks with   
appropriate weights on the inner and outer edges of the   
rims as required. According to the specifications, the   
imbalance of the final assembly should be no larger than   
100g/cm, which is approximately equal to the 5g balance 
blocks on the inner and outer edges of the rims. It should 
be noted that at most one balancing block is allowed to be 
placed on each side of each wheel, with the maximum mass no larger than 70g. During the 
process of assembling, excessively heavy shocks should be avoided to the balancing 
blocks. In the case that excessive shocks are felt, the balancing blocks should be replaced 
in time. The balance blocks taken down in the replacement should not be used again. 

 

 

  Chery QQ Service Manual                                                            Chassis System

 

11、Installation 

block

outboa

block 

（1）  When making the assembly of the 
wheels and tires, first fix the wheel screws onto   
the hubs manually and tighten them slightly.   
Then use special tools to tighten the screws in   
the diagonal sequence till the specified torque 
of 110±10N.m is applied. It is not allowed to   
use impact wrenches that might cause damages   
to the wheels, or insufficient tightness or excessive 
tightness. It is not allowed to apply lubricating grease onto the wheel screws. (For the 
completed assembly of wheels and tires, the wheel screws should be re-tightened after the 
car runs for 100km so that the specified torque is assured. The checks on the torque of the 
fixing screws are one of the routine maintenance items). 
 

 

（2）    When tightening the screw nuts, the   
cross approach is applied. The extent of tightness   
should be close to each other, and the wheels should 
be able to turn freely. When the final tightening is 
made, the wheels should be positioned on the ground. 
 
 
 
（3）Install the decorated covers or place the decorative covers as needed. When the 
clip-type decorative covers are installed, they should be driven in either with hands or by 
way of rubber hammering tools. 
 

III.    Checks on the looseness of wheel bearings 

1、Check the axial spacing of the bearings 
Maximum: 0.05mm 
2、Check the bias of the bridge hub 
Maximum: 0.05mm 
 
 

IV. 

Checks on the looseness of front suspension system   

V. 

Checks on the looseness of turning transmission rod system 

VI. 

Checks on ball joint looseness 

VII.  Checks on the normal performances of absorbers 

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  Chery QQ Service Manual                                                            Chassis System

 

 

1、Check to see if there is any oil leakage; 
2、Check to see if there are any tears and wears of the assembly sheaths; 
3、Check the resistance of the absorbers. Make proper replacement if any incompliance is 
detected. 

 
 
 

Section Two: Positioning of Rear Wheels 

   

It is recommended to use the four-wheel positioning device for the chassis of this car model, 
which applies the positioning approach by way of axis thrust. 
In the position adjustments by way of axis thrust, the toe-in of the rear wheels may have 
impacts upon the toe-in of the single front wheel. Therefore, when doing the four-wheel 
positioning, the adjustments of the rear wheels are generally done before the adjustments of 
the front wheels. Besides, the camber angle of the rear wheels is adjusted before adjusting 
the toe-in angle, followed by the adjustments of the camber angle and toe-in angle of the 
front wheels. 

 

I. Measure the height of the car 

Before measuring the height of the car, first increase the air pressure of the tires to the 
specified value (make sure that the air pressures for the left and right tires should be 
identical). 

front

 

 

1、The front measuring point 
The height of the center point from the ground to the 
link screw nut for the lower control arm assembly and 
the front turning joints is to be measures. The car 
body height of the left and right wheels should be 
basically the same. 

 
 

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back

2、The rear measuring point 

 

The height of the center point from the ground to link   
screwnut for the rear bridge and the absorber is to be 

measured.  

The left and right body heights should be basically the same. 

 
 
 
 

  Chery QQ Service Manual                                                            Chassis System

 

 
Attention: Before testing and checking the wheel positioning, the car should be first 
adjusted to the specified height. 
If the car height does not meet the specification, check the front and rear suspension 
systems of the car to see if there are any damages or deformations. 
   

II. Place the wheel positioning device or the positioning tester on the 

wheel

 

1、 

Install the instruments in the way as specified by the   

manufacturer of the devices; 

2、 

Make tests and adjustments on the car as required by 

the equipment. The specifications for the positioning are 
as follows: 

 

Rear wheel assembly toe-in

20

1

±40

1

Single rear wheel toe-in 

10

1

±20

1

Rear wheel camber angle 

0

1

±20

1

Thrust angle 

-13

1

~+10

1 

 
 
 

Section Three: Front Wheel Positioning 

I. Measure the car height 

Do the measuring and adjustments in the same procedures as the ones for the car 

height measurements for rear wheel positioning. 
 

II. Place the wheel positioning device or the positioning tester on the 

wheel 

 
Install the instruments in the way as specified by the 
manufacturer of the devices. 
 
 
 
 
 
 

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