Allied Systems Allied H6G Series, Service Manual

Page: 49 / 122

Section 2
2 - 5
PROBLEM POSSIBLE CAUSE CORRECTION
Winch will not generate suffi -
cient 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 Ports 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; refer to tractor oil speci-
fi cations.
Low oil level in reservoir. Add oil; 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).
BRAKE-OFF function will
not operate or is difficult to
engage.
BRAKE-OFF solenoid is not ener-
gized.
Check resistance to ensure it’s 35 ohms at the
coil. Repair power supply or replace coil and/
or solenoid.
Insuffi cient control pressure from trac-
tor pilot supply. 1. Measure control pressure to BRAKE-OFF
bypass valve (170 psi to shift).
2. Check for leaks at hydraulic connections.
3. See Pilot Supply Relief Adjustment.
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 joystick in
FREESPOOL position.
Repair parts if damaged.
Leakage at hydraulic connection or
FREESPOOL shaft.
Remove top covers and inspect shifter fork
with joystick 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.
Figure 2-2 Troubleshooting Chart_2