SECTION 3 - GENERAL ELECTRICAL INFORMATION & SCHEMATICS
3121801 3-17
High-Speed Drive function does not operate
Loose or damaged wiring between drive controller and High
Speed switch.
Ensure proper connection of wires. Using suitable test meter,
perform continuity test on wiring between switches. Repair
or replace wires as necessary.
Defective high speed control switch. Replace high speed control switch.
Loose or damaged wiring in control box wire harness. Ensure proper connection of wires at the control switch.
Using suitable test meter, perform continuity test on wires.
Repair or replace harness as necessary.
Loose or damaged wiring between platform and high speed
solenoid.
Ensure proper connection of wires at the platform and at the
high speed solenoid. Using suitable test meter, perform con-
ti nu it y te st on w ire s. R ep air or rep lac e w ires as ne ces sa ry.
High speed solenoid not functioning properly. Replace solenoid.
Loose or damaged wiring between high speed relay and high
speed limit switch.
Ensure proper connection of wires between high speed relay
and high speed limit switch. Using suitable test meter, per-
fo rm con tin ui ty tes t o n wi res. Re pai r o r re pl ace wir es a s n ec-
essary.
High speed limit switch not functioning properly. Repair or replace limit switch.
Loose or damaged wiring in valve wiring harness. Ensure proper connecti on of wire s at te rmi na l st ri p. Usi ng
suitable test meter, perform continuity test on wires. Repair
or replace wires as necessary.
Steering System
No response to steer control switch on controller
Steer switch on controller not functioning properly. Repair or replace switch.
Hydraulic system oil low. Replenish oil as necessary.
Hydraulic system pressure too low. Adjust pressure.
Loose or damaged wiring on control switch or solenoid valve. Ensure proper connection of wires at control switch or sole-
noid valve. Using suitable test meter, perform continuity test
on wires. Repair or replace wires as necessary.
Restricted or broken hydraulic line on valve bank or hydraulic
pump.
Clean, repair or replace line.
Control valve not functioning properly. Repair or replace valve.
Steer cylinder not functioning properly. Repair or replace cylinder.
Machine hard to steer or steering is erratic
Hydraulic system oil low. Replenish oil as necessary.
Restricted or broken hydraulic line or fitting. Clean, repair or replace line or fitting.
Machine hard to steer or steering is erratic (cont.)
Lack of lubrication on steer components. Lubricate steer components in accordance with Lubrication
Chart.
Restricted crossover relief valve. Clean or replace valve.
Steer system pressure low. Adjust pressure.
Bent steering linkage. Repair or replace linkage as required.
Hydraulic pump not functioning properly. Repair or replace valve.
Steer cylinder not functioning properly. Repair or replace cylinder.
Table 3-2. Chassis Troubleshooting
TROUBLE PROBABLE CAUSE REMEDY
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