23
Trouble “D” Continued From
Previous Page
See remedies for Trouble D1 & D2.
Same as remedies for Trouble E2.
Refer to hoist performance charts for
additional information.
Perform rigging service as recom-
mended by crane manufacturer.
3. Ensure the hydraulic system tem-
perature is below 180°F (82°C). Ex-
cessive hydraulic oil temperatures
increase motor internal leakage and
reduces motor performance.
4. Hoist line pull rating is based on
1st layer of wire rope.
5. Rigging and sheaves not operat-
ing effi ciently.
TROUBLE
PROBABLE CAUSE
REMEDY
E
The winch runs hot
Same as remedies for Trouble D1.
Thoroughly clean exterior and fl ush
interior.
Fill/drain to proper level.
Same as remedies for Trouble D2.
Check relief valve setting.
Engine low on horsepower or R.P.M.
Tune/adjust engine.
Check suction line for damage.
Pump worn. Replace pump.
Use correct hydraulic oil.
Disassemble hoist to inspect/ replace
worn parts.
1. Same as D1.
2. Ensure the hydraulic system tem-
perature is below 180°F (82°C). Ex-
cessive hydraulic oil temperatures
may be caused by:
A. Plugged heat exchanger.
B. Too low or too high oil level in
hydraulic reservoir.
C. System relief lifting.
D. Hydraulic pump not operating
effi ciently.
E. Hydraulic oil is wrong viscos-
ity for operating conditions.
3. Excessively worn or damaged in-
ternal winch parts.
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