22
PROBLEM POSSIBLE CAUSE CORRECTION
Low oil pressure Leaking pressure hoses and
fi ttings.
Check for leaks and replace components where
necessary. Be sure hoses are not rubbing on any
gears or winch components.
Defective or improperly adjusted oil
relief valve; poppet may be stuck
open.
Clean relief valve if no pressure, then adjust.
Check relief valve with pressure gauge. Replace if
defective.
Clogged suction fi lter. Check and clean or replace suction fi lter.
Oil brake leaking internally
(indicated by low brake pressure).
Repair as required.
Defective hydraulic pump. Check pump pressure output only after all other
checks have been made. Worn pump indicated by
pressure variation with engine RPM. If pump is at
fault, replace.
Valve spool is not moving far
enough
Check to verify the control valve spool travel (refer
to Control Valve Spool Travel Check in Service
Manual).
Figure 9 - Troubleshooting Analysis Chart
(Continued on next page)
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