Chery S11 / Chery QQ. Manual — part 195

Chery QQ Maintenance 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 Maintenance 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.

2、The rear measuring point

back

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.

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Chery QQ Maintenance 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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III. Check and adjust the front wheel main pin backward tilting angle,

Chery QQ Maintenance Manual Chassis System

main pin interior falling-in angle, wheel camber angle as well as the wheel

toe-in and steering angle

Specifications: The requirements for the front wheel positioning are as follows:

Main pin backward tilting angle

3°.15

1

±30

1

Front wheel camber angle

1°±30

1

Single front wheel toe-in angle

10

1

±10

1

Steering angle

Inner side：35

0

±4°

Outer side：31

0

±4

Note: The backward tilting angle is adjusted before adjusting the camber angle and the
toe-in angle.

1、Main pin backward tilting angle
This angle is assured by way of the designed configuration, which makes the operational
adjustments unnecessary.

The impacts of backward tilting angle

The major function of the backward tilting angle is to keep the car moving in the

straightly forward direction. If the backward tilting angle is positive, the inner side of the
car will be lowered when the front wheel turns in directions, which results in the uprising
of the chassis. That will increase the loads onto the knuckles. If the backward tiling angles
of the two wheels are identical, the car will be back to the straightforward direction after
turning the directions. The increase of the positive backward tilting angle will increase the
stability of the steering wheel, but the turning forces will be increased as well. The decrease
of the positive backward tilting angle will reduce the stability of the steering wheel but the
turning forces will become reduced. The extent of the backward tiling angles will not have
impacts upon the tears and wears of the tires. They are used to stabilize the driving
directions and ensure the automatic returning to the straightforward direction after turning.
If the car is equipped with the traditional mechanic steering devices, the backward tilting
angle will be very small or even tending to be in the negative, which makes the turning of
direction easier. If the car is equipped with the dynamic steering device, the backward tiling
angle is generally set to be relatively large positive angle, which allows the driver to feel
the turning of directions. The increase of the positive backward tiling angle will increase
the forces for turning, and increase the stability in straightforward movement of the car.

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