Case 580SR Service Manual page 575

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Fatigue failure of pinion teeth
See if the fracture line is well
defined
(wave lines, beach lines)
Pinion and ring teeth breakage
Side gear spline worn out
Replace all scratched washers
(Excessive backlash)
Thrust washer surface worn out
or scratched
Inner diameter of tapered roller
bearing worn out
Bent or broken half shaft
Half shaft broken at wheel side
SECTION 27 - REAR AXLE
Exhaustive use
Continuous overload
Crash load of differential
components
Excessive use
Insufficient lubrication
Incorrect lubrication
Contaminated oil
Excessive use
Excessive pinion axial backlash
Insufficient lubrication
Contaminated oil
Vehicle intensively operated or
overloaded
Wheel support loose
Beam body bent
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Replace bevel gear set.
Check and/or replace other
differential components.
Replace differential gear group.
Replace half shaft if required.
Use correct lubrication and fill up to
right level.
Replace at intervals recommended.
Replace all scratched washers and
those with a thickness by 0.1 mm
lower than the new ones.
Replace bearing.
Check pinion axial backlash.
Use proper lubrication, fill up to right
level and replace at recommended
intervals.
Replace.
Replace.
Check that wheel support is not
worn out or wrongly adjusted.
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