Allied H6G, Service Manual

Page: 39 / 112

Section 2
2 - 5
PROBLEM POSSIBLE CAUSE CORRECTION
Winch will not generate suf-
ficient line pull or does not
LINE-IN or LINE-OUT
(Continued from previous
page)
Leak in motor speed spool relief car-
tridge (
HI-SPEED only).
Check that the pressures at motor test ports
A & B are suffi cient for operating the winch in
LINE-IN/OUT with the brake line plugged. If the
pressure is low and registered simultaneously
at A and B, leakage is occurring past the relief
valve. Remove and repair the valve.
Clogged fi lter. Tractor fi lter indicator light will illuminate if
fi lter is clogged. Replace fi lter. Refer to tractor
specifi cations.
Wrong oil. Use correct oil grade (MIL-PRF-2105E); refer
to tractor oil specifi cations.
Low oil level in reservoir. Add oil (MIL-PRF-2105E); refer to tractor oil
specifi cations.
Tractor pump not generating ad-
equate pressure. Hold blade over relief and measure supply
pressure at right side of dozer. If pressure is
below 3625 psi see tractor service manual for
proper adjustment.
Damaged FREESPOOL components
may be causing winch to be stuck in
FREESPOOL .
Inspect FREESPOOL shaft for wear or dam-
age, repair or replace as necessary.
Motor damaged. Repair or replace motor (refer to Section 4).
FREESPOOL will not function
or is diffi cult to engage.
FREESPOOL shifter fork or collar
stuck.
Remove top covers and inspect shifter fork &
collar with control lever in
FREESPOOL posi-
tion. Repair parts if damaged.
Leakage at hydraulic connection or
FREESPOOL shaft.
Remove top covers and inspect shifter fork with
control lever in
FREESPOOL position. Replace
seals if leaking.
Insuffi cient control pressure from trac-
tor pilot supply. 1. Measure control pressure at brake (BR)
port and FREESPOOL (FS) hose (refer
to Section 3).
2. Check for leaks at hydraulic connections.
FREESPOOL solenoid is not ener-
gized.
Repair power supply or replace coil and/or
solenoid.
Load on wire rope. Move lever to LINE-OUT to release load.
HI-SPEED function will not
operate.
2-speed spool in motor stuck. Clean and/or repair 2-speed spool.
2-speed pressure switch malfunction-
ing (normally closed.) Repair or replace 2-speed pressure switch.
2-speed relay malfunctioning. Repair or replace relay.
2-speed solenoid is not energized. Repair power supply or replace coil and/or
solenoid.
Winch case oil level too high. Too much oil added. Drain oil (MIL-PRF-2105E) until level at oil
level plug.
Winch case oil level too high
and tractor reservoir too low. Oil leak from FREESPOOL hose or
piston.
Visually inspect and repair as needed.
Figure 2-2 Troubleshooting Chart - 2