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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