SECTION 3 - GENERAL ELECTRICAL INFORMATION & SCHEMATICS
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Table 3-2. Chassis Troubleshooting
TROUBLE PROBABLE CAUSE REMEDY
Drive System
No response to drive controller
Joystick not activated within three seconds after drive select
switch is activated.
Activate drive select switch, then activate joystick within
three seconds.
Enable circuit not functioning properly. Replace enable circuit card.
Hydraulic system oil low. Replenish oil as necessary.
Hydraulic pump not functioning properly. Repair or replace pump.
Restricted or broken pump supply line. Clean, repair or replace line.
Drive motor not functioning properly. Repair or replace motor.
Damaged wiring on drive controller. Repair or replace wiring.
Drive controller not functioning properly. Repair or replace controller.
Drive brake not releasing. Determine cause and repair or replace brake.
Machine drives erratically
Microcircuit on controller improperly adjusted. Adjust microswitch on controller for proper operation.
Machine will not travel forward
Joystick not activated within three seconds after drive switch
is activated.
Activate drive switch, then activate joystick within three sec-
onds.
Enable circuit not functioning properly. Replace enable circuit card.
Hydraulic system oil low. Replenish oil as necessary.
Restricted or broken hydraulic line or fitting. Clean, repair or replace line or fitting.
Control valve not functioning properly. Repair or replace valve.
Drive motor not functioning properly. Repair or replace motor.
Brake not functioning properly. Repair or replace brake.
Engine will not respond when enable switch is activated and
drive controller is activated.
Refer to Electrical System Troubleshooting - No response to
control switch.
No electrical signal being sent to the drive valve cartridge. Refer to Electrical System Troubleshooting - No response to
control switch.
Machine will not travel in reverse
See: Machine will not travel forward.
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