Troubleshooting - Uline BIG JOE H-4709 Manual De Instrucciones

H-4709
BIG JOE ELECTRIC
®
PALLET TRUCK
MALFUNCTION
TROUBLE WITH LIFTING OR
LOWERING – CONTINUED
Forks lift, but will not go
down.
Load will not hold.
Forks do not lift to top.
Pump motor runs.
Forks creep downward
under load when in a
raised position.
MISCELLANEOUS
Steering arm does not
return to the upright
position.
Truck moves forward
when arm is pulled down.
Steering arm jerks
excessively when starting
or stopping the truck.
Drive motor is jerky.
CHARGING
Charger will not turn on.
Batteries will not charge.
PAGE 3 OF 13
1-800-295-5510
uline.com

TROUBLESHOOTING

PROBABLE CAUSE
Defect in hydraulic system.
a. Oil bypassing internally in
control valve.
b. Worn lift cylinder or packing.
a. Oil level too low.
b. Load larger than capacity.
c. Batteries need charging.
Leak in hydraulic system, lift
cylinder or lowering valve.
a. Weak return spring.
b. Binding.
a. Deadman switch defective.
b. Short in control head.
Drive wheel worn.
Motor internally damaged or
worn.
a. Power cord disconnected
from charger.
b. Charger defective
a. Loose connections.
b. Batteries run too low. Smart
charger cannot detect battery.
CORRECTIVE ACTION
Check lowering control switch in control head
and lowering solenoid on valve assembly.
Replace as required.
Replace valve assembly.
Repack cylinder.
Add oil to reservoir.
Refer to I.D. plate for capacity.
Charge batteries.
Check for leaking fitting in hydraulic line and
repair as required. Repack lift cylinder or
replace valve assembly.
Replace spring.
Check and free the binding item. Verify that
the cable has not been damaged. Repair or
replace as needed.
Check for short and repair or replace as
necessary.
Check wiring and repair as required.
Replace drive wheel if worn to within 3/4" of hub.
Replace motor.
Reconnect power cord to charger.
Replace charger.
Check all connections from charger to
batteries.
Jump batteries using a trickle charger.
0321 TH-4709