JLG E45A_AJ ANSI Service Manual - Manual (Page 108)

SECTION 3 - TROUBLESHOOTING
3-12 – JLG Lift – 3120765
Joystick not functioning properly. Replace joystick/Run System Test.
Charger plugged in. Check help message.
Drive prevented. Check help message.
Brake(s) not releasing. Determine cause and repair or replace.
Machine will not travel in forward.
Hydraulic system oil low. Replenish oil as necessary.
Restricted or broken hydraulic line or fitting. Clean, repair or replace line or fitting.
Motor turns slowly at maximum command.
Cutback - Tilted Check help message.
Speed Sensor Check help message.
Cutback - Elevation. Check elevation switch.
Poor response, function shuts off slowly
when command is removed.
Ramp set too high in controller. Check personality.
Sticking control handle. Repair or replace controller.
STEERING SYSTEM.
No response to steer control.
Hydraulic system pressure too low. Adjust pressure.
Damaged wiring on control switch or solenoid
valve. Check wiring/Run System test.
Control switch not functioning properly. Run system test.
Restricted or broken hydraulic line on valve
bank, hydraulic pump or rotary coupling. (If
equipped.) Clean, repair or replace line.
Steer proportional flow valve not functioning
properly. Run System Test.
Steer control valve not functioning properly. Repair or replace valve.
Steer cylinder not functioning properly. Repair or replace cylinder.
Machine hard to steer or steering is erratic.
Hydraulic system oil low. Replenish oil as necessary.
Restricted hydraulic line or fitting. Clean, repair or replace line or fitting.
Steer system pressure low. Adjust pressure.
Bent linkage (tie rods). Repair or replace linkage as required.
Table 3-4.Chassis Assembly - Troubleshooting
TROUBLE PROBABLE CAUSE REMEDY