15
B
Oil leaks from vent plug.
Same as A2.
Case drain back pressure must not ex-
ceed 100 PSI (6.9 bar) for gear motors
and 44 PSI (3 bar) for piston motors.
Inspect hydraulic power supply for a
restriction in the return line to the res-
ervoir.
Oil analysis may indicate contamination
has worn motor shaft and seal. Thor-
oughly flush entire hydraulic power sup
-
ply and install new filters and oil. Install
new motor seal.
1. Same as A2.
2. Motor seal may be defective as a
result of high back pressure in the mo-
tor case drain circuit or contaminated
oil. Contamination will usually cause
the seal to wear a groove in the motor
shaft.
TROUBLE
PROBABLE CAUSE
REMEDY
C
Brake will not hold a load with the
control lever in neutral.
The pressure at the motor reel-out port
is also transmitted to the brake release
pilot circuit. Inspect hydraulic circuit for
restrictions, plugged filters or control
valves not centering.
Same as Remedy of Trouble A3.
Improper planetary gear oil may cause
the brake discs to slip. Drain old gear oil
and flush winch with solvent. Thorough
-
ly drain solvent and refill winch with rec
-
ommended planetary gear oil listed in
Preventive Maintenance section of this
manual.
1. Excessive system back pressure act-
ing on the brake release port.
2. Friction brake will not hold due to
worn or damaged brake discs.
3. Brake discs are slipping.
D
Winch does not reel in the rated load.
Reinforce mounting surface.
If necessary, use shim stock to level
winch. Refer to Winch Installation sec-
tion of this manual.
First loosen, then evenly retighten all
winch mounting bolts to recommended
torque.
Check relief pressure as follows:
A. Install an accurate 0–5,000 PSI
(0–344.7 bar) gauge into the inlet port
of the brake valve.
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 winch the rated load and
cause heat.
2. Hydraulic power supply relief valve
may be set too low. Relief valve needs
adjustment or repair
.
