Allied H12E, Service Manual

Page: 61 / 121

Troubleshooting
2 - 2
PROBLEM POSSIBLE CAUSE CORRECTION ACTION
Winch Operates But Exhibits The Following Problems
Winch operates in LINE-IN only. Brake shuttle stuck. Check for debris.
Counterbalance valve pilot signal
blocked or connected to drain. Check for plugged control manifold
passage or missing manifold plug.
Counterbalance valve damaged or
set incorrectly. Adjust or replace counterbalance
valve.
Malfunction in the ripper control
circuit. Troubleshoot circuit per tractor
service manual.
Winch operates in LINE-OUT only. Brake shuttle stuck. Check for debris.
Malfunction in the ripper control
circuit. Troubleshoot circuit per tractor
service manual.
Winch will not generate suffi cient
line pull. Tractor implement pump relief set
too low. Check tractor hydraulic system
settings.
Motor damaged. Repair or replace motor.
BRAKE-OFF clutch slipping. See Troubleshooting for “ BRAKE-
OFF Clutch Slipping”.
BRAKE-OFF clutch will not operate. No BRAKE-OFF release pressure.
Control malfunction.
Valve not working.
Check solenoid valve operation.
Check electrical signal to solenoid
valve.
Check electrical console switch.
Low BRAKE-OFF release pressure. Check for low pilot supply pressure.
Check for leaks in supply lines or
clutch piston leak.
Mechanical damage to BRAKE-OFF
clutch.
Repair BRAKE-OFF clutch.
BRAKE-OFF clutch slipping. Clutch release pressure is present
in other than
BRAKE-OFF control
position.
Check control system.
Check for high pilot drain pressure.
Clutch damaged or worn. Repair BRAKE-OFF clutch.
Figure 2-1 Mechanical/Hydraulic Troubleshooting Chart - 2