16
Trouble “D” Continued From
Previous Page
B. Apply a stall pull load on the winch
while monitoring pressure.
C. Compare gauge reading to winch
specifications. Adjust relief valve as
required.
NOTE:
If pressure does not increase
in proportion to adjustment, relief valve
may be contaminated or worn out. In
either case, the relief valve may require
disassembly or replacement.
Same as remedies for Trouble D1 and
D2.
Same as remedies for Trouble E2.
Refer to winch performance charts for
additional information.
Perform rigging service as recom-
mended by crane manufacturer.
3. Be certain hydraulic power supply
temperature is not more than 180°F
(82°C). Excessive hydraulic oil temper-
atures increase motor internal leakage
and reduces motor performance.
4. Winch line-pull rating is based on
first layer of wire/synthetic rope.
5. Rigging and sheaves not operating
efficiently.
TROUBLE
PROBABLE CAUSE
REMEDY
E
Winch runs hot.
Same as remedies for Trouble D1.
Thoroughly clean exterior and flush in
-
terior.
Fill/drain to proper level.
Same as remedies for Trouble D2.
Engine low on horsepower or RPM
Tune/adjust engine.
Check suction line for damage.
Pump worn. Replace pump.
Use correct hydraulic oil.
Disassemble winch to inspect and/or
replace worn parts.
1. Same as D1.
2. Be certain that the hydraulic power
supply temperature is not more than
180°F (82°C). Excessive hydraulic oil
temperatures may be caused by:
A. Plugged heat exchanger.
B. Too low or too high oil level in hy-
draulic reservoir.
C. Same as D2.
D.
Hydraulic pump not operating effi
-
ciently.
E. Hydraulic oil is wrong viscosity for
operating conditions.
3. Excessively worn or damaged inter-
nal winch parts.
