4-4
BL-GL22-1119 - 11-20-2019
Table 4-1 Troubleshooting Chart - Continued
MALFUNCTION
PROBABLE CAUSE
CORRECTIVE ACTION
TROUBLE WITH LIFTING OR
LOWERING - Continued
Forks do not lift, motor runs.
Defect in hydraulic system.
Check the oil level in the reservoir
and the oil lines to the lift cylin-
der, and repair as required. If
normal, check the hydraulic
pump, and relief valve. Repair, or
adjust.
Forks lift, but will not go down.
Defect in hydraulic system
Check lowering control switch in
control head and lowering sole-
noid on valve assembly. Replace
as required.
Load will not hold
a. Oil bypassing internally in con-
trol valve
Replace valve assembly.
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.
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
valve assembly.
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 3/4 inch of hub.
Drive motor is jerky.
Motor internally damaged or worn.
Replace motor.
Summary of Contents for 989021
Page 9: ...BL GL22 1119 11 20 2019 2 3 Figure 2 2 Sample of Operator Check List R8549 ...
Page 12: ...2 6 BL GL22 1119 11 20 2019 NOTES ...
Page 18: ...3 6 BL GL22 1119 11 20 2019 NOTES ...
Page 38: ...4 20 BL GL22 1119 11 20 2019 NOTES ...
Page 43: ...BL GL22 1119 11 20 2019 5 5 Figure 5 4 Cap Assembly EF_0007 ...
Page 46: ...6 2 BL GL22 1119 11 20 2019 Figure 6 1 Transmission Motor Brake Assembly EF_0004 ...
Page 48: ...7 2 BL GL22 1119 11 20 2019 Figure 7 1 Transmission Motor Brake Mounting EF_0004 ...
Page 50: ...7 4 BL GL22 1119 11 20 2019 NOTES ...
Page 55: ...BL GL22 1119 11 20 2019 9 3 Figure 9 2 Elevation System Telescopic EF_0016 ...
Page 58: ...10 2 BL GL22 1119 11 20 2019 Figure 10 1 Electrical System Telescopic EF_0011 ...
Page 61: ...BL GL22 1119 11 20 2019 11 1 SECTION 11 OPTIONAL EQUIPMENT N ABL GL22 1119 11 20 2019 ...
Page 62: ...11 2 BL GL22 1119 11 20 2019 NOTES ...
Page 64: ...12 2 BL GL22 1119 11 20 2019 Figure 12 1 Frame System Telescopic Mast EF_0002 ...
Page 66: ...12 4 BL GL22 1119 11 20 2019 Figure 12 2 Caster Assembly EF_0003 ...
Page 68: ...12 6 BL GL22 1119 11 20 2019 Figure 12 3 Transmission Motor and Brake EF_0004 ...
Page 70: ...12 8 BL GL22 1119 11 20 2019 Figure 12 4 Steering System EF_0005 ...
Page 72: ...12 10 BL GL22 1119 11 20 2019 Figure 12 5 Control Head EF_0006 ...
Page 74: ...12 12 BL GL22 1119 11 20 2019 Figure 12 5 Cap Assembly EF_0007 ...
Page 76: ...12 14 BL GL22 1119 11 20 2019 Figure 12 6 Hydraulic System EF_0008 ...
Page 78: ...12 16 BL GL22 1119 11 20 2019 Figure 12 7 Pump and Motor Assembly EF_0010 ...
Page 80: ...12 18 BL GL22 1119 11 20 2019 Figure 12 8 Lift Cylinder EF_0009 ...
Page 82: ...12 20 BL GL22 1119 11 20 2019 Figure 12 9 Telescopic Mast Lift System EF_0016 ...
Page 84: ...12 22 BL GL22 1119 11 20 2019 Figure 12 10 Telescopic Mast Chain Assembly EF_0017 ...
Page 86: ...12 24 BL GL22 1119 11 20 2019 Figure 12 11 Fork Carriage EF_0018 ...
Page 88: ...12 26 BL GL22 1119 11 20 2019 Figure 12 12 Electrical System EF_0011 ...
Page 90: ...12 28 BL GL22 1119 11 20 2019 Figure 12 13 Wiring Harness EF_0012 ...
Page 92: ...12 30 BL GL22 1119 11 20 2019 Figure 12 14 Wiring Cables EF_0013 ...
Page 94: ......