JLG Commander CM1432 Operators & Safety Service & Maintenance Illustrated Parts Manual page 80

JLGSizzor
TROUBLE
Drive System. (continued)
Machine overspeeds when descending
a grade.
High-Speed Drive function does not
operate. (Toggle Switch Drive)
SECTION 9- TROUBLESHOOTING
Table 9-2. Chassis Troubleshooting.
PROBABLE CAUSE
Overcenter cartridge not functioning
properly.
Loose or damaged wiring between
DRIVE control and High Speed switch.
Defective high speed control switch.
Loose or damaged wire in control box
wire harness.
Loose or damaged wire between
platform and high speed solenoid.
High speed solenoid not functioning
properly.
Loose or damaged wires between high
speed relay and high speed limit switch.
High speed limit switch not functioning
properly.
Loose or damaged wire in valve wiring
harness.
Motor/pump assembly defective.
- JLG
Sizzor -
JLGSizzor
REMEDY
Replace overcenter cartridge.
Ensure proper connection of wires.
Using suitable test meter, perform
continuity test on wiring between
switches. Repair or replace wires as
necessary.
Replace switch.
Ensure proper connection of wire at the
control switch. Using suitable test
meter, perform continuity test on wire.
Repair or replace harness as
necessary.
Ensure proper connection of wire at the
platform and at the high speed
solenoid. Using suitable test meter,
perform continuity test on wire. Repair
or replace harness as necessary.
Replace solenoid.
Ensure proper connection of wires
between high speed relay and high
speed limit switch. Using suitable test
meter, perform continuity test on wires.
Repair or replace wires as necessary.
Repair or replace limit switch.
Ensure proper connection of wires at
terminal strip. Using suitable test
meter, perform continuity test on wires.
Repair or replace harness as
necessary.
Replace motor/pump assembly.
9-5