Chery QQ6 (S21) / S12LHD. Manual — part 51

30

4.4.4 Remove the lock nuts from the rear brake with drum

assywith a 30# combination sleeve, and then take off the rear

brake with drum assy.

Torque: 180±10N.m

4.4.5 Remove the rear axle assy.

5. Installation Step

The installation step is reverse to that of removal.

31

III. Adjustment of Four-Wheel Alignment System

Please check and adjust the parameters with the help of the four-wheel alignment system

recommended by the CHERY Automobile Co.. Ltd.

S21 standard four-wheel alignment system parameters:

Item

Parameter

Model

SQR7130S21

SQR7110S21

Front Wheel

Camber Angle

0.87°±50′

0.87°±50′

Kingpin Caster

Angle

3.4°±30′

3.4°±30′

Kingpin

Inclination Angle

12.7°

12.7°

Front

Wheel

Front Wheel

Toe-In

6′±6′

6′±6′

Rear Wheel

Camber Angle

0°±30′

0°±30′

Rear

Wheel

Rear Wheel

Toe-In

0°±10′

0°±10′

Sideslip

≤ 3m/km

≤ 3m/km

1. Adjustment of Front Wheel Toe-In

The toe-in can be adjusted using an optical tester or a mechanical toe-in regulator.
1.1 On the basis of requirement of the tester, position the wheels and conduct the preparation
work before adjusting.
1.2 Loosen the lock nut and of the elastic protective sleeve snap ring right steering tie bar. Turn
the toe-in regulator lever as required to regulate the length until it reaches the specified value; and
the toe-in value: 6′±6′.
1.3 Tighten the lock nut, reinstall the elastic snap ring of protective sleeve, and then check
whether the lock nut is tightened and whether the position of protective sleeve is proper;
Torque: 35±3Nm
1.4 After adjusting toe-in of front wheel, check whether the steering wheel is horizontal.
Otherwise, loosen the lock nut of steering wheel, regulate the steering wheel to the horizontal
position, and then tighten the steering wheel lock nut to the specified torque.

2. Adjustment of Front Wheel Camber Angle

2.1 In the normal case, after the independent suspension and

wheel steering knuckle are assembled, it is unnecessary to

adjust the camber angle. If the wheel camber angle is found

deviated from the tolerance range due to the other causes,

apply the connecting bolts of independent suspension and

steering knuckle to correct the camber angle.:

Front wheel camber angle: 0.87°±50′

32

2.2 Before correction, check (visually) whether the parts of running system is damaged, and

repalce the damaged parts;

2.3 If the front wheel camber angle is found out of the tolerance range, loosen the connecting

bolts of front shock absorber and steering knuckle, and move the wheel to correct the angle.

3. Adjustment of Kingpin caster and inclination angles

The Kingpin caster and inclination angles are guaranteed by the design structure, without

adjustment in service. The Kingpin caster angle: 3.4°±30′, Kingpin inclination angle: 12.7°. If any

parameter exceeds the specified range, replace thesteering knuckle only.

4. Adjustment of rear wheel positional parameters

All of the rear wheel alignment parameters shall be guaranteed through design process.

4.1 Rear wheel camber angle: 0°±30′

4.2 Rear wheel toe-in: 0°±10′

4.3 If the rear wheel alignment parameters change due to the deformation of rear axle which is

subject to the very big impact force, and these parameters exceed the specified range, correct or

replace the rear axle only.

IV. Installation of Tire and Regulation of Air Pressure

1. Assembly of Tire Valve

Prior to the assembly of tire valve, firstly check the valve port to ensure whether it is smooth and

free from burr, and then apply glycerol on the rubber body surface, or soak the tire valve into

glycerol. Pull or press using special tools with 200 - 400N to make the locating ring of the valve

can go through the wheel holes, to this point, the assembly is completed (soap water is allowed

to substitute glycerol).

2. Assembly of Tire

Before assembly of the tire, apply glycerol or soap water along the cycle of tire bead, meanwhile,

note that:

2.1 If the wheel rim has the dot marks, align the uniformity testing marks with the dot marks of

the wheel rim.

2.2 When without dot marks on the wheel rim, align the dynamic balance testing mark of tire to

valve position.

2.3 When without dot marks on the wheel rim, additionally, there is no dynamic balance testing

mark, however, static balance testing mark is available, align the valve to the static balance

testing mark.

2.4 The description concerning the uniformity, dynamic balance and static balance testing marks

33

for tires will be additionally provided in written forms by product division of Chery Company or

suppliers, and indicated on process sheet.

2.5 Carry out tire inflation strictly in accordance with specified pressure. During inflating

process, air pressure shall not exceed 10% of rated pressure. When performing separate

packaging to spare wheel assembly, the rated inflation pressure shall be 3.0 bar, and the spare

wheel assembly shall be stored separately from four wheels. Before the four-wheel alignment

work, check the air pressure of tires of four wheels and regulate the pressure: 2.3 bar for front

wheel, and 2.1bar for rear wheel.

3. Tire Inflation

After completion of tire inflation, screw up the protective cap of valve, and then carry out

dynamic balancing test. Fit appropriate balance weight at the internal and external fringe of

wheel rim as required. It is required that the unbalancedness of the final assembly shall be less

than 100 g·cm, which is approximately equivalent to a 5g balance weight at the internal and

external fringe of wheel rim. Note: each wheel and each side can use only one balance weight.

Additionally, its maximum mass shall not be more than 70g. During assembling process, never

hit the balance weight too heavy. Otherwise, replace balance weight in time. In addition, never

use the replaced balance weight again.

4. Installation of Wheel and Tire Assy

When install wheel and tire assy, firstly, manually screw up the wheel bolt onto the hub for

pretension, then use special tools for tightening in accordance with diagonal process. Tightening

torque shall be 110±10N.m. It is prohibited to use impact wrench to cause wheel damage, over

loose or over tight. It is not allowed to apply grease on wheel bolt. (For the newly-installed

wheel and tire assy, after the initial mileage of 100 km, tighten the wheel bolts once to ensure the

tightening torque. Checking the tightening torque of wheel bolts is one of routine maintenance.)

5. Method to Tighten the Wheel Nut

Tighten the fixing nut in a decussate way, the tightening force shall be approximately equal, then

wheel shall be able to turn freely. When carry out final tightening, the wheel shall be on the

ground.

6. Installation of Trim Cover

Install trim cover or place trim cover as required. When fitting clip- type trim cover, place knock

in position by hand or via rubber tools.