SECTION 27 - REAR DRIVE AXLE (GEARBOXES)
27-6
FINAL DRIVE SYSTEM
PROBLEM POSSIBLE CAUSES CORRECTION
Check for pump to motor oil flow
and repair
Check gearbox shaft rotation and
repair
Check chains and repair
Check chain and repair
Check axle and sprocket, replace
Check and adjust chains
Check oil level
Check sprockets and repair
Check axle and gearbox bearings
and repair
Check bearings and repair
Check axle bearing pre-load,
repair
Check oil level
Check shafts and bearings, repair
Check drive motor and repair
Check and replace
Decrease lubrication interval to
every 500 hours
Both drive wheels on one side
not powered
One drive wheel not powered
Chain case noise
Excessive axle play
Noise in gearbox
Axle outer bearing failure
No hydrostatic motor shaft rotation
No gearbox output drive
Broken drive chains
Broken drive chain
Axle or drive sprocket splines worn
Loose drive chains
No oil in final drive
Worn drive sprockets
Bearing failure
Bearing failure on axle shaft
Snap ring failure on axle shaft
No or low oil in gearbox
Bearing failure
Bearing or shaft failure in drive
motor
Gears in gearbox worn
Prolonged operation in liquid or
semi-liquid material
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