Blue Giant BG E-Step, Owner'S Manual

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SECTION 3
TROUBLESHOOTING
3-1. GENERAL
Use Table 3-1 as a guide to determine possible causes
of trouble. The table is divided into five main categories:
Vehicle and Hydraulic System Will Not Operate: Vehicle
Does Not Operate Forward or Reverse: Trouble With
Braking: Trouble With Lifting Or Lowering, and
Miscellaneous malfunctions.
Table 3-1 Troubleshooting Chart
Table 3-1 Troubleshooting Chart - Continued
MALFUNCTION PROBABLE CAUSE CORRECTIVE ACTION
TROUBLE WITH LIFTING OR
LOWERING
• Oil sprays or flows from the top
of the lift cylinder.
Defective packing in lift cylinder Repair lift cylinder.
• Squealing sounds when lifting
Operator’s platform.
Identify oil leak and fill reservoir.
Apply grease.
a.
Oil level too low.
b.
Dry channels in mast.
c.
Defective mast or Platform
rollers
Replace rollers.
• Platform does not lift to full lift
height.
a. Oil level too low. Add oil to reservoir.
b. Load larger than capacity. Refer to I.D.plate for capacity.
• Weak, slow or uneven action of
hydraulic system.
a. Defective pump or relief valve. Check pressure. Adjust as
necessary.
b. Worn lift cylinder. Replace cylinder.
c. Load larger than capacity. Refer to I.D.platefor capacity.
d. Defective lift motor relay. Replace relay on pump motor.
e. Battery charge low. Charge battery.
• Platform does not lift, pump
motor does not run.
Check and recharge if required.
Check and repair as required.
a.
Battery is dead or
disconnected.
b.
Defective wiring.
c.
Defect in electrical system for
operating pump motor.
Check lift switch on platform, as well
as the relay.
• Platform does not lift, motor
runs.
Defect in hydraulic system. Check the oil level in the reservoir and
the oil lines to the lift cylinder, and
repair as required. If normal, check the
hydraulic pump, and relief valve.
Repair, or adjust.
• Platform lifts, but will not go
down.
Defect in hydraulic system Check lowering control switch and
lowering solenoid. Replace as
required.
• Load will not hold Replace valve assembly.
a.
Oil bypassing internally in
control valve
b.
Worn lift cylinder or packing. Repack cylinder.
• Platform does not lift to top.
Pump motor runs.
a. Oil level too low. Add oil to reservoir.
b. Load larger than capacity. Refer to nameplate on side of mast for
maximum load capacity.
c. Batteries need charging. Charge batteries.
• Platform drifts down under load
when in a raised position.
Leak in hydraulic system, lift
cylinder or lowering valve. Check for leaking fitting in hydraulic
line and repair as required. Repack lift
cylinder or replace valve assembly.
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