Case 580SR+ - Page 430

78 SECTION 25 - FRONT AXLES
PROBLEM CAUSE CORRECTION
Ring gear tooth broken on the
outer side
Excessive gear load compared to
the one foreseen
Incorrect gear adjustment
(excessive backlash)
Pinion nut loose
Replace bevel gear set.
Follow carefully the recommended
operations for the adjustment of the
bevel gear set backlash.
Ring gear tooth broken side Load bump
Incorrect gear adjustment (insuffi-
cient backlash)
Pinion nut loose
Replace bevel gear set.
Follow carefully the recommended
operations for the adjustment of the
bevel gear set backlash.
Pinion or ring gear teeth worn Insufficient lubrication
Contaminated oil
Incorrect lubrication or depleted
additives
Worn out pinion bearings that
cause an incorrect pinion axle
backlash and wrong contact
between pinion and ring
Replace bevel gear set.
Follow carefully the recommended
operations for the adjustment of the
bevel gear set backlash.
Use correct lubricants, fill up to the
right levels and replace according to
the recommended program.
Overheated ring and pinion teeth
See if gear teeth have faded
Prolonged functioning at high
temperatures
Incorrect lubrication
Low oil level
Contaminated oil
Replace bevel gear set.
Use proper lubrication, fill up to right
level and replace at recommended
program.
Pinion teeth pitting Excessive use
Insufficient lubrication
Replace bevel gear set.
Use correct lubrication, fill up to the
right level and substitute at recom-
mended intervals.
Axle beam body bent Vehicle overloaded
Vehicle’s accident
Load bump
Replace axle beam body.
Worn out or pitted bearings Insufficient lubrication
Contaminated oil
Excessive use
Normal wear out
Pinion nut loose
Replace bearings.
Use correct lubrication, fill up to the
right level and substitute at recom-
mended intervals.
Oil leakage form gaskets and
seals
Prolonged functioning at high
temperature of the oil
Oil gasket assembled incorrectly
Seal lip damaged
Contaminated oil
Replace the gasket or seal and
matching surface if damaged.
Use correct lubrication and replace
at recommended intervals.
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