F-5
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
Front Axle
2. TROUBLESHOOTING (Contd.)
This chapter is a descriptive and explanatory guide to common axle problems. This guide suggests the
repair correct procedures to be followed.
TROUBLE PROBABLE CAUSE REMEDY REF.
Ring gear tooth
broken at the
outer side
Ring gear tooth
broken side
Pinion or ring
gear teeth or
worn
Overheated ring
and pinion teeth.
See if gear teeth
have faded
Pinion teeth
pitting
Axle beam body
bent
Worn out or
pitted bearings
1. Excessive gear load compared
to the one foreseen
2. Incorrect gear adjustment
(excessive back-lash)
3. Pinion nut loosened
1. Load bump
2. Incorrect gear adjustment
(insufficient back-lash)
3. Pinion nut loosened
1. Insufficient lubrication
2. Contaminated oil
3. Incorrect lubrication or depleted
additives
4. Worn out pinion bearings that
cause an incorrect pinion axle
back-lash and wrong contact
between pinion and ring.
1. Prolonged functioning at high
temperatures
2. Incorrect lubrication
3. Low oil level
4. Contaminated oil
1. Excessive use
2. Insufficient lubrication
1. Vehicle over loaded
2. Vehicle’s accident
3. Load bump
1. Insufficient lubrication
2. Contaminated oil
3. Excessive use
4. Normal wear out
5. Pinion nut loosened
Replace bevel gear set Follow
carefully the recommended
operations for the adjustment of
bevel gear set back-lash.
Replace bevel gear set Follow
carefully the recommended
operations for the adjustment of
bevel gear set back-lash.
Replace bevel gear set. Follow
carefully the recommended
operations for the adjustment of
bevel gear set back-lash.
Use correct lubricants, fill up to the
right levels and replace according
to the recommended program.
Replace bevel gear set.
Use proper lubrication, fill up to
right level and replace at
recommended program.
Replace bevel gear set.
Use correct lubrication, fill up to
the right level and substitute at
recommended intervals
Replace axle beam body
Replace bearings.
Use correct lubrication fill up, to
the right level and replace at
recommended intervals