CSM 7/10/15
SPM-627A
11. Trouble Shooting Guide Problem
Possible Cause
NO LIFT (Motor does not run)
y y y y y y y y
Faulty wiring from fuse to lift switch in handle. Faulty lift switch Faulty wiring from lift switch to pump contactor. Faulty lift contactor Faulty wiring from battery positive terminal to pump contactor, or from pump contactor to pump motor. Worn out brushes in pump motor. Defective control circuit fuse and/or main power fuse.
y y y
Low hydraulic pressure caused by: - Pressure relief valve needing adjustment. - Pump check valve stuck open. - Faulty solenoid valve. Check oil level if forks do not raise fully. Check hydraulic pump operation. Defective control circuit fuse.
FORKS WILL NOT LOWER
y y y y y y y y
Faulty lowering switch on steering handle. Faulty wiring from lowering switch to solenoid valve. Faulty solenoid coil on soft-shift control valve. Faulty soft-shift control valve. Faulty load lowering valve. Faulty velocity fuse. Faulty control circuit fuse. Mechanical binding
NO ELECTRICAL POWER (no travel)
y
No electrical power caused by: - Key switch in “OFF” position. - Emergency disconnect button depressed. - Faulty SB connector (or unplugged). - Loose battery connections. - Defective control circuit fuse and/or main power fuse. Faulty wiring from fuse to travel control switch. Faulty travel control switch. Faulty wiring from travel control switch to direction contactor. Faulty contactor. Check traction motor.
NO LIFT (Motor runs)
y y y y y
Issue Date: 07/08/04
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