Hyundai HL955 Manual page 144

2) 2) DIFFERENTIAL / AXLE DIFFERENTIAL / AXLE
Problem
Differential low on oil
Excessive differential
and/or axle noise
Oil seeping from outer
axle seal
Axle overheats
Cause
External leakage.
Low oil level in differential.
Incorrect type of oil.
Dragging brakes.
Failed pinion bearing.
Incorrect gear mesh pattern
between ring and pinion gear.
Failed differential pinion gears
and/or cross shafts.
Failed axle bearing.
M e c h a n i c a l fa i l u r e i n a x l e
planetary.
Excessive end play in axle.
Worn outer bearing and/or cup.
Overfilled differential.
Low differential oil.
Overfilled differential.
Brake drag.
3-88
Remedy
Inspect axle and differential for leaks.
Check oil. Remove drain plug and inspect for
metal particles in differential case.
Disassemble and determine cause.
Change oil
Do brake check.
Remove and inspect pinion.
Check to ensure pinion housing was indexed.
Remove pinion gear housing and inspect ring
and pinion gear.
Remove differential housing drain plug and
inspect for metal particles. Disassemble and
inspect.
Do axle bearing adjustment check.
Remove differential. Inspect, repair.
Do axle bearing adjustment check.
Disassemble and inspect outer axle bearing,
cup, spacer, and seal. Replace, if necessary.
Check differential oil return system for
excessive internal restriction.
Add oil.
See differential overfills with oil in this group.
See brakes drag in this group.