4.4.4.3 Preliminary inspection before tire alignment 

Notes: 

The following inspection steps must be carried out before positioning the tires; otherwise, new faults may be 
caused by incorrect positioning. 

1 

Check whether the tire inflation pressure is abnormal as well as whether the tire wear is abnormal? 

 

 

 

 

2 

Check whether the wheel bearing is loose? 

 

 

 

 

3 

Check whether the lower swing arm ball head or the steering tie rod ball head are loose? 

 

 

 

 

4 

Check whether the wheel and tire run-out is abnormal? 

 

 

 

5 

Check whether the warping height of the vehicle is abnormal? 

 

 

 

6 

Check whether the support assembly is installed wrongly? 

 

 

 

Adjust the tire pressure to the standard value, 
and replace the tire when necessary. 

Inspect whether the wheel bearing bolt is loose 
and replace the wheel bearing if necessary. 
Refer to 4.2.7.9 replacement of front hub. 

Fasten the nut and replace the lower swing arm 
ball head or the steering tie rod ball head if 
necessary.

Measure and correct the tire run-out. 

Correct the vehicle nose before adjusting the 
toe-in. 

Replace support post assembly, refer to 4.2.7.3 
front support post assembly replacement. 

No 

Yes 

No 

Yes 

No 

Yes 

No 

Yes 

No 

Yes 

No 

Yes 

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7 

Check whether the lower control swing arm is loose? 

 

 

 

 

8 

Check whether the equipment quality of the vehicle is normal or overloaded? 

 

 

 

 

9 

Perform four-wheel positioning procedure 

 

Refer to 4.2.7.2 replacement of lower swing Arm 
Lining to fasten the control arm connecting bolt 
and replace the lower swing lining if necessary. 

The vehicle is restored to the curb weight state 
when leaving factory. 

No 

Yes 

No 

Yes 

1484

 
 

 

4.4.4.4 Wheel bearing diagnosis 

Warning: Please carry out road test of vehicle under the safety condition and comply with all traffic 
regulations. Do not attempt any operation that could jeopardize vehicle control. If contrary to the above 
safety instruction, result in serious injury accident and damage to the vehicle. 

1 

Carry out road test for the vehicle to confirm the fault phenomenon. 

Tips: when the sealed wheel bearing is damaged, the outside impurities enter into the bearing to damage 
the damage; during rotating through external force, the bearing will make a sound similar to hum when the 
airplane takes off; thus, the noise appears only when the vehicle is in motion and it is stable without 
fluctuation and increased with increasing the vehicle speed. 

 

 

2 

Confirm whether the wheel bearing makes noise.  If not determining whether the wheel bearing makes 
the noise in the process of road test, hoist the vehicle. 

To avoid any vehicle damage, serious personal injury or death when major components are dismantled 
from the vehicle and the vehicle is supported by a hoist, support with jack the components standing at the 
opposite end from which the components are being dismantled of the vehicle. 

 

 

3 

Check whether the wheel is bent? 

 

 

 

 

4 

Check whether the wheel is unbalanced? 

 

 

 

5 

Rotate the tire and wheel assembly to listen to whether the wheel bearing makes a noise. 

Warning: when rotating the wheel by hand, the tire must be held by hand 

to 

rotate. 

If the position is 

incorrect, it is likely to result in personal injury! 

Note: the front wheel bearing is pressed into the steering knuckle; and the rear wheel bearing is located in the 
brake drum and the wheel bearing assembly. The inner race is separated from the rear wheel bearing to result 
in the emergency of the noise. 

Replace the wheel 

Carry out dynamic balance for the wheels again 

Next 

Next 

No 

Yes 

No 

Yes 

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6 

The wheel is shaken by hand to check whether the wheel bearings are loose? 

7 

Perform a comprehensive comparison test with the normal vehicle in the same type to confirm 
whether the noise belongs to the normal working noise. 

Refer to 4.2.7.9 replacement of front hub to 
replace the wheel bearing. 

Refer to 4.2.7.9 replacement of front hub to 
replace the front wheel bearing. 

No 

Yes 

No 

Yes 

1486