Blue Giant BGL-22, Руководство пользователя

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Table 4-1 Troubleshooting Chart - Continued
MALFUNCTION PROBABLE CAUSE CORRECTIVE ACTION
TROUBLE WITH LIFTING OR
LOWERING - Continued
Forks lift, but will not go down. Defect in hydraulic system Check lowering control switch in
control head, lowering relays
(15 & 16,
Figure 12-22 ) & low-
ering solenoid (20, Figure 12-
14 ). Replace as required.
Load will not hold a. Oil bypassing internally in con-
trol valve
Replace or repair valve assembly
(21, Figure 12-14 ).
b. Worn lift cylinder. Replace 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 capac-
ity.
c. Batteries need charging. Change batteries.
Forks creep downward under load
when in a raised position.
Leak in hydraulic system, lift cylin-
der or lowering valve.
Check for leaking fitting in hydrau-
lic line and repair as required.
Repack lift cylinder or replace
or repair valve assembly (21,
Figure 12-14 ).
MISCELLANEOUS
Steering arm does not return to
the upright position.
a. Week return spring. Replace spring.
b. Binding. Check and free the binding item.
Verify that the cable has not
been damaged. Repair or
replace as needed.
Truck moves forward when arm is
pulled down.
a. Belly-button switch defective. Check for short, and repair or
replace as necessary.
b. Short in control head. Check wiring and repair as
required.
Steering arm jerks excessively
starting or stopping the truck.
Drive wheel worn. Replace drive wheel if worn to
within 3/8 inch of hub.
Drive motor is jerky. Motor internally damaged or worn. Replace motor.
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