JLG 450AJ ANSI Service Manual User Manual
Page 89
SECTION 2 - PROCEDURES
3120749
– JLG Lift –
2-71
Clutch engaged actuator retracting
Controller fault - clutch disengaged and no actuator
movement
Failure Modes
Immediate Red Light
Action:
1.
Recycle power to determine if the problem is inter-
mittent.
2.
The input voltage must be greater than 10.5 Vdc.
3.
Check wiring for any damage and correct.
4.
Disconnect engine harness and actuator connnec-
tions.
5.
If problem reoccurs return unit.
Green and either Amber light followed by a red light
or
then
Action:
1.
Inspect and clean wiring connections.
2.
Examine throttle linkage for any damage or bent
components and correct.
3.
With linkage disconnected, check each potentiome-
ter for operation.
4.
Reconnect linkage and reset each potentiometer for
correct operation.
5.
If failure continues to occur, replace unit.
Only green light on and no actuator movement
Action:
1.
Adjust trim potentiometers.
2.
If problem continues, replace unit.