112
Fault symptom
Possible cause
Eliminating method
Leakage of the rear
axle lubrication
5. Blocking or damage of the ventilation
plug
6. Axle housing cracks
7. Damageor distortion of the coupling
flange sealing surface
8. Malfunction of bearing leads to radial
run out of coupling flange
9. Axle housing distortion caused by
overloading
5. Clean or replace the ventilation plug
6. Repair or replace the axle housing
7. Adjust or replace the coupling flange
8. Replace the bearing
9. Adjust or replace the axle housing
Hub bearing
jamming
1. Excessive pre-tightening force of the
hub bearing
2. Inadequate lubrication of the bearing
or incorrect usage of the grease
3. The bearing is defiled by the dust
4. Water entering bearing due to
malfunction of sealing ring
1. Adjust the pre-tightening force
2. Intensify the lubrication or replace
the grease
3. Clean and intensify the lubrication
4. Replace the sealing ring
5. Front axle and steering system common trouble and its elimination
Fault symptom
Possible cause
Eliminating method
Steering wheel
shimmy
1. The steering system
1) Steering gear housing bolt or steering
column supporting loose
2) Looseness of the steering connection
point
3) Excessive clearance of the steering gear
housing
2. The front axle
1) Umbalance or abrasion of the rim, the
spoke and the wheel
2) Abrasion of the front wheel bearing
3) Excessive abrasion of the king pin or the
bushing
4) Deformation of the knuckle
5) Improper wheel alignment
1
）
Tighten to specified torque
2
）
Adjust the junction
3
）
Adjust the clearance
1
）
Balance all the components and
replace faulted components.
2
）
Replace the bearing
3
）
Adjust or replace the faulted parts
4
）
Replace the knuckle
5
）
Check and adjust the wheel
alignment
