Section 2
2 - 1
Troubleshooting
General
Winch problems generally fall into one of three categories:
controls, hydraulic system, or mechanical system. Follow
the troubleshooting steps below to isolate the probable
location of the malfunction.
1.
Make sure the control lever (including pilot controller
unit) is functioning properly, with a full range of
motion.
2. Check the oil level and type. Ensure the operating
temperature range for the oil is suitable for the
conditions. Check the filter indicator.
3.
Check winch hydraulic pressures. Start with control
pressures, then check main system pressures.
4.
Inspect the winch gear train for problems.
CAUTION
For best operation and life, the winch oil
operating temperature should not exceed
180°F (82°C). Oil reservoir temperature is
monitored at the dozer.
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 fitting, 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
schematic?
No
Correct the routing. Refer to the
Schematic & installation drawing.
Yes Proceed to step 1.6.
Winch Control
1.6 Is control lever valve connected to pilot supply?
No
Connect control lever and check
that control signal RI & RO is
actually being supplied to the
winch.
Yes Proceed to step 1.7.
1.7 Is drain pressure less than 44 (winch criteria) psi?
No
Check drain hoses for restriction.
Yes Proceed to step 1.8.
1.8 Operate control lever in both directions. Is pressure at RI & RO greater
than the pilot pressure of 500-580 psi?
No
Verify that pilot pressure to direction
spool will cause the pump to load
sense. Return to step 1.6.
Yes Proceed to step 1.9.
(Continued on the next page)
Summary of Contents for H6H
Page 3: ......
Page 9: ...vi Notes...
Page 49: ...General 1 40 Notes...
Page 65: ...General 1 56 Notes Notes...
Page 71: ...Troubleshooting 2 6 Notes...
Page 78: ...Section 3 3 7 Notes...
Page 79: ...Service 3 8 Notes...
Page 84: ...Section 4 4 5 Intentionally Blank...
Page 92: ...Section 4 4 13 7 Remove the counterbalance relief manifold...
Page 96: ...Section 4 4 17 Intentionally Blank...
Page 98: ...Section 4 4 19 7 Separate the clutch hub and the pressure plate CLUTCH HUB PRESSURE PLATE...
Page 102: ...Section 4 4 23 Intentionally Blank...
Page 112: ...Section 4 4 33 Intentionally Blank...
Page 126: ...Section 4 4 47 Intentionally Blank...
Page 132: ...Section 4 4 53 Notes...