TROUBLE
PROBABLE CAUSE
REMEDY
C
The brake will not hold
a load with the control
lever in neutral.
1. Excessive system back pressure
acting on the brake release port.
2. Friction brake will not hold due to
worn or damaged brake discs.
3. Brake clutch is slipping.
The same as Remedy 2 of Trouble B2.
Same as Remedy 3 of Trouble A3.
Improper planetary gear oil may cause
the brake clutch to slip. Drain old gear oil
and flush winch with solvent. Thoroughly
drain solvent and refill winch with rec-
ommended planetary gear oil listed in
“Preventive Maintenance.”
Brake clutch may be damaged or worn.
Disassemble and inspect brake clutch as
described in “Brake Clutch Service.”
D
The winch will not hoist
the rated load.
1. The winch may be mounted on
an uneven or flexible surface which
causes distortion of the winch base
and binding of the gear train. Binding
in the gear train will absorb horsepower
needed to hoist the rated load and
cause heat.
2. System relief valve may be set too
low. Relief valve needs adjustment or
repair
3. Be certain hydraulic system tem-
perature is not more than 180°F.
Excessive hydraulic oil temperatures
increase motor internal leakage and
reduce motor performance.
4. Winch line pull rating is based on
first layer of wire rope.
5. Rigging and sheaves not operating
efficiently.
Reinforce mounting surface.
If necessary, use shim stock to level
winch. Refer to “Winch Installation.”
First loosen, then evenly retighten all
winch mounting bolts to recommended
torque.
Check relief pressure as follows:
A. Install an accurate 0-4000 PSI (27,580
kPa) gauge into the inlet port of the brake
valve.
B. Apply a stall pull load on the winch
while monitoring pressure.
C. Compare gauge reading to winch spec-
ifications. 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 disas-
sembly or replacement.
Same as remedies for Trouble D1 and
D2.
Same as remedies for Trouble E2.
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