WALTCO WDV, Tech Manual

Page: 34 / 48

PLATFORM WILL NOT LIFT TO FULL CAPACITY
•
Check the fluid in the reservoir, fill with correct fluid. See Checking the
oil level in the reservoir
•
Check for any mechanical obstructions or any mechanical damage. Look
for any broken or bent parts that could interfere with normal operation.
•
Check the cables for damages, clean dirty connections and tighten any
loose connections
•
Check the voltage at the pump motor. The voltage should be at least 10.5
volts.
•
Determine whether or not this happens with the platform loaded or
unloaded? If the gate will not lift to full height loaded,
•
Check the charge of the batteries. Confirm that the lift gate has a
dedicated ground. Check the battery(s) for full state of charge. Replace
any batteries that cannot be fully charged.
•
Check for leaking hoses and lines. Replace any leaking lines or lines.
CONTROL SWITCH FUSE BLOWN
•
Check the wiring for damages, clean dirty connections and tighten any
loose connections
•
Check and inspect for a short in switch control wire.
•
Check for a defective switch.
•
Check for defective coils on valves Check for 10.5 volts at the coil. Test
the coils (4.5ohms) Confirm that the valve is magnetizing.
•
Check and inspect the motor solenoid
BLEEDING INTSRUCTIONS FOR THE LIFT CYLINDERS
1) Turn on vehicle or apply battery charger to the lift gate batteries.
2) With Platform open run the power unit until the platform is stopped at
its maximum lifting height.
3) With the platform at the maximum lifting height continue to run the
power unit for 35 seconds. (Do Not Lower the platform at this time)
4) Let the power unit rest for 5 minutes (or switch to auxiliary pump) and
run power unit for 35 seconds again with the platform at the maximum
lifting height. Leave the platform open for ½ hour at floor height to see
if the platform remains level or drifts down. If platform drifts down
repeat bleeding procedure.
5) The lifting cylinders are now bled.
Trouble s hooting Guide
34