Troubleshooting
2 - 2
Step-by-Step Pump and Controller Troubleshooting
1. Winch does not operate with the tractor running.
1.1 Is there oil in the reservoir? No Fill tractor reservoir.
Yes Proceed to step 1.2.
1.2 Is the winch in FREESPOOL? No Proceed to step 1.3.
Yes Shift winch out of FREESPOOL
Function.
1.3 Is there a broken tube, loose fi tting, or burst hose? No Proceed to step 1.4.
Yes Repair the fault.
1.4 Is the brake released? No Check brake release circuit or
mechanism.
Yes Proceed to step 1.5.
1.5 Is the hydraulic hose routing in accordance with the hydraulic sche-
matic?
No Correct the routing. Refer to the
Schematic & installation drawing.
Yes Proceed to step 1.6.
Pilot Reducing Valve
1.6 Is there any pilot pressure from the tractor (port P at tractor interface
or pilot check port right side of dozer)?
No Proceed to step 1.12.
Yes Proceed to step 1.7.
1.7 Is the pilot standby pressure at least 275±15 psi while the dozer is
running at slow idle?
No Proceed to step 1.8.
Yes Proceed to step 1.10.
1.8 Is the pilot pressure 650 psi when the dozer blade is held over relief? No Proceed to step 1.10.
Yes Proceed to step 1.12.
1.10 Can the pilot pressure be increased by adjusting the tractor pilot reduc-
ing valve?
No Proceed to step 1.11
Yes Adjust to 650 psi. Proceed to 1.12.
1.11 Remove pilot reducing cartridge valve and inspect. Is it damaged? No Refit cartridge and proceed to
step 1.12.
Yes Replace cartridge and return to
step 1.6.
Winch Control
1.12 Is lever control unit connected to pilot supply? No Connect joystick and check that
control signal RI & RO is actually
being supplied to the winch.
Yes Proceed to step 1.13.
1.13 Is case pressure less than 35 psi? No Check drain hoses for restriction.
Yes Proceed to step 1.14.
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