SECTION 3 – TROUBLESHOOTING
3-4 USTC January 15, 2001
TROUBLE PROBABLE CAUSE REMEDY
Table 3-3. Chassis Components
PTO jumping out of gear. Shift rail poppet spring broken.
Shift rail poppet notch worn.
Shift fork sprung or loose on shift
rail.
Gear teeth worn.
Gears not shifted fully in mesh.
Shift linkage too short.
Improper number of gaskets.
Gears worn and pitted.
Bearings worn due to high loads
or chips.
Oil seal failure.
Broken gaskets.
Crack or hole in housing.
Air entering system through a
broken hydraulic suction line or
fitting.
Air bubbles in oil caused by
depleted reservoir oil level.
Contaminated oil filters.
Worn or chipped pump gears.
Worn or broken pump drive
shaft.
Low hydraulic oil level.
Restricted or broken suction line.
Worn or chipped pump gears.
Worn or broken pump drive
shaft.
Replace poppet spring.
Replace shift rail.
Replace shift fork or tighten set
screw in shift fork.
Replace worn gears.
Check shift linkage for proper
adjustments.
Adjust shift linkage to permit full
shift.
Check backlash and refer to
setting the backlash.
Replace worn gears.
Reduce load. Replace worn and
rough bearings and change oil.
Replace worn seal.
Replace gasket(s).
Replace housing.
Check suction side of hydraulic
system for defects and repair.
Add oil.
Replace oil filter.
Repair or replace pump.
Replace pump drive shaft.
Add oil.
Remove line and clear
obstruction or replace.
Repair or replace pump.
Replace pump drive shaft.
Noisy PTO.
Oil leaking from PTO.
Hydraulic pump noisy.
No oil delivery from pump.
Courtesy of Crane.Market
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