7.2.7.3 Fault symptom table 

Help to determine the cause of the fault and part in the diagnostic process with reference to the following table. 
Display the possible malfunction causes in the descending numerical order and check each component in order. 
Repair or replace these components if necessary. 

Symptoms 

Suspected Parts 

Measures / Refer to 

1. 

Tire(Charging is inadequate or tire 
damaged) 

For aeration or replacement of the tires, see 4.4 
eheels and tires. 

2. 

Power steering liquid level (lower). 

Refer to 7.2.8.2 inspection of power steering oil 
level to add steering fluid. 

3. 

Drive belt (loosed) 

Refer to 7.2.8.1 inspection of transmission belt 
to pre-tighten or replace the transmission belt. 

4. 

Front wheel alignment (incorrect) 

Adjust front wheel alignment. Refer to 4.4.3.1 
wheel alignment. 

5. 

Power steering gear tie rod ball 
(wear) 

Replace tie rod ball head, refer to7.2.8.11 
replace steering tie rod and ball head. 

6. 

Lower swing arm ball end (wear) 

Replace lower swing alarm ball head, refer 
to4.2.7.7 lower swing alarm ball head assembly 
replacement. 

7. 

Front shock absorber upper support 
seat assembly(worn) 

Refer to 4.2.7.4 replacement of front damper 
part and spring to replace the front damper 
upper support assembly. 

8. 

Steering column inner shaft ( stuck )

Refer to 11.3.8.12 replacement of mechanical 
steering column assembly to repair or replace 
the steering column. 

9. 

Universal joint between the upper 
and lower intermediate shaft 
assemblies (wear and rusting) 

Lubricate or replace the intermediate shaft of the 
mechanical steering column assembly. 

10.  Power steering pumps assembly 

(Inner decompression or plug. Pump 
blade damaged) 

Refer to 7.2.8.10 replacement of power steering 
pump assembly to replace the power steering 
pump assembly. 

11.  Power steering gear (Inner 

decompression. Control vale or rake 
clamping stagnation or damaged ) 

Refer to 7.2.8.13 replacement of power steering 
gear assembly with tie rod to replace the power 
steering gear. 

It is difficult to 

steer. 

12.  Air resistance occurred in the power 

steering hydraulic system 

Refer to 7.2.8.7 air exhaust procedure of power 
steering system to exhaust air in the steering 
system. 

1. 

Tire(Charging is inadequate) 

For aeration or replacement of the tires, see 4.4 
wheels and tires. 

2. 

Front wheel alignment (incorrect) 

Adjust front wheel alignment. Refer to 4.4.3.1 
wheel alignment. 

3. 

Lower swing arm ball head (seize) 

Refer to 4.2.7.7 replacement of lower swing arm 
ball head assembly to repair or replace the lower 
swing arm ball head. 

Poor Steering 

Wheel Return 

4. 

Universal joint between upper and 
lower counter shaft assemblies 
(rusted and jammed) 

Lubricate or replace upper and lower 
intermediate shaft assemblies. 

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5. 

Steering column inner shaft ( stuck )

Refer to 11.3.8.12 replacement of mechanical 
steering column assembly to repair and lubricate 
or replace the steering column. 

6. 

Power steering gear (control valve 
jammed or gear rack bearing over 
pre-tensioned and jammed) 

Wash the steering hydraulic system or repair 
and replace the power steering gear. Refer to 
7.2.8.13 replacement of power steering gear 
assembly with tie rod. 

 

7. 

Front shock absorber top bearing 
seat assembly (wear) 

Refer to 4.2.7.4.replacement of front damper 
part and spring to replace the front damper 
upper support assembly. 

1. 

Steering gear tie rod (loosening) 

Refer to 7.2.8.11 replacement of steering tie rod 
and bulb to fasten or replace the steering tie rod.

2. 

Lower swing arm ball head (abrasion 
or loosening) 

Replace lower swing alarm ball head    , refer 
to4.2.7.7 lower swing alarm ball head assembly 
replacement  . 

3. 

Front wheel bearing (worn or 
loosed ) 

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

Steering system 

stroke is too big 

 

4. 

Power steering gear steering tie rod 
assembly (loosening of fixing bolt) 

Refer to 7.2.8.13 replacement of power steering 
gear assembly with tie rod to fasten the fixing 
bolt. 

1. 

Power steering liquid level (low) 

Refer to 7.2.8.2 inspection of power steering oil 
level to add steering fluid. 

2. 

Steering pipe column (inner shaft, 
bearing is loose) 

Refer to 11.3.8.12 replacement of mechanical 
steering column assembly to repair or replace 
the steering column. 

3. 

Universal joint of upper and lower 
intermediate shaft assembly (loosed )

Fasten or replace upper and lower intermediate 
shaft assemblies. 

4. 

Power steering gear steering tie rod 
assembly (loosening of fixing bolt) 

Refer to 7.2.8.13 replacement of power steering 
gear assembly with tie rod to fasten the fixing 
nut. 

5. 

Steering gear tie rod (loosening) 

Refer to 7.2.8.11 replacement of steering tie rod 
and ball head to fasten the fixing nut or replace 
the tie rod ball head. 

6. 

power steering gear ( preloading 
force of rack bearing is too loose) 

Refer to 7.2.8.13 replacement of power steering 
gear assembly with tie rod to replace the power 
steering gear. 

Noise 

7. 

Power steering pump assembly(flow 
control valve or pump blade 
damaged ) 

Refer to 7.2.8.10 replacement of power steering 
pump assembly to replace the power steering 
pump assembly. 

 

8. 

Front wheel bearing (loosening)   

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

1. 

Power steering system(Included air )

Refer to 7.2.8.7 air exhaust procedure of power 
steering system to exhaust air in the steering 
system. 

2. 

Connection between upper, lower 
middle shaft assembly and power 
steering wheel tie rod assembly 
(loose) 

Fasten the connecting nut. 

The steering 

wheel rebounds 

too large or 

steering gear is 

too relax. 

3. 

Steering tie rod ball head(loosed ) 

Refer to 7.2.8.11 replacement of steering tie rod 

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and bulb to fasten or replace the steering tie rod 
ball head. 

4. 

Front wheel bearing (abrasion) 

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

5. 

Power steering gear (Inside loosed ) 

Refer to 7.2.8.13 replacement of power steering 
gear assembly with tie rod to repair or replace 
the power steering gear assembly with the 
steering tie rod. 

1. 

Frongt wheel alignment (incorrect) 

Adjust front wheel alignment. Refer to 4.4.5.2 
front wheel toe-in adjustment. 

2. 

Front suspension ( location 
incorrect ) 

Adjust and fasten front suspension part. Refer to 
4.2 front suspensions. 

3. 

Wheel and tire ( unbalance ) 

Dynamic balance of tire or replacement of tire 
and rim refer to 4.4 wheel and tire. 

4. 

Front wheel bearing (wear and 
loose) 

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

5. 

Damping spring (breakage or fatigue 
and weakening) 

Refer to 4.2.7.4 replacement of front damper 
part and spring to replace the damping spring. 

6. 

Front post (loosed and damaged ) 

Refer to 4.2.7.3 replacement of front support 
assembly to fasten or replace the front support. 

7. 

Brake system (loosed or work is 
abnormal ) 

Refer to 6 brake system to repair the brake 
system. 

Drifting or 

Steering 

Instability 

8. 

Rear suspension (inaccurate 
alignment or loosening) 

Adjust and fasten rear suspension part. Refer to 
4.3 rear suspension. 

1. 

Front suspension (Kingpin 
longitudinal inclination is even and 
incorrect) 

Inspect and adjust the front suspension 
positioning. Refer to 4.2 front suspensions. 

2. 

Lower swing arm (loose) 

Refer to 4.2.7.2 replacement of lower swing arm 
lining to fasten or replace the lower swing 
lining. 

3. 

Brake disc( deformation ) 

Replace brake disc, refer to6.2.5.3 replace brake 
disc. 

4. 

Damping spring (breakage or fatigue 
and weakening) 

Refer to 4.2.7.4 replacement of front damper 
part and spring to replace the damping spring. 

5. 

Front or rear wheel bearing (Wear 
loosed) 

Refer to 4.2.7.9 replacement of front hub and 
4.3.7.10 replacement of rear hub unit to replace 
the front or rear wheel bearing. 

Unstable steering 

during brake 

6. 

Brake system ( Brake force is not 
even and correct) 

Refer to 6 brake system to repair the brake 
system. 

 

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7.2.8 Dismantle and installation   

7.2.8.1 Drive belt inspection 

1. 

Check whether pretensioning of drive belt is 
normal. Refer to the inspection of drive belt. 

2. 

Check whether drive belt has excessive abrasion, 
and curtain line breakage, etc. 

3. 

If any defect of drive belt is found, replace drive 
belt. 

Notes: 

At the side of the transmission belt with rib, a slight 
crack is to be acceptable. If the transmission belt 
cracks from the rib or the shoulder are missing, if 
necessary, replace it. 

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7.2.8.2 Power steering oil fluid lever inspection 

1. 

Place vehicle on horizontal position. 

2.  When engine stops, inspect oil level in oil 
reservoir. Add fluid into the oil pan if necessary. The 
temperature of the pre-heated oil is 75-80℃ (167-176 
ºF). The liquid level shall be located between the 
marks HOT MAX and HOT MIN. The temperature of 
the cooled oil is 20℃ - 25℃ (68 -77ºF). The liquid 
level shall be located between the marks COLD MAX 
and COLD MIN. 

Notes: 

Note: be sure to correctly use oil. 

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3. 

Preheat power steering oil, start engine to make it 
run at idle speed. 

4. 

Turn steering wheel from left bottom to right 
bottom for several times to make oil temperature 
increase. Oil temperature preheat to: 75 - 
80℃(167 - 176 ºF). 

5. 

Check the braking fluid for bubbling or 
emulsification. In case of bubbling or 
emulsification, you need to purge air from the 
power steering system. See 7.2.8.7 Power 
Steering System Air Purging Procedures. 

6. 

Check the oil level in the oil pan when the engine 
runs in the idle mode. 

7. Stop 

the 

engine. 

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Normal 

Abnormal

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