Drive Functions - Genie GTH-636 Service Manual

June 2007
REV A
1-4

Drive Functions

Symptom:
Machine won't drive.
If the back-up alarm operates:
• Troubleshoot ground wire connection on the
transmission mount at the cab side of the
machine.
• Troubleshoot clutch cut-off switch and switch
wiring. Remove black wires from clutch cut-off
pressure switch (under cab floor) and connect
together.
• Troubleshoot transmission shift coils and wiring.
If the back-up alarm does not operate:
• Check for faulty 20A fuse at top left of fuse
block.
If the sway function operates:
• Troubleshoot the parking brake relay and relay
wiring OR parking brake pressure switch and
wiring.
• Troubleshoot transmission controller and wiring.
If the sway function does not operate:
• Troubleshoot the boom limit switch and limit
switch wiring. With boom in stowed position,
look for 12V at yellow wire on the switch (to
calibrate the boom limit switch, refer to Repair
Procedure 1-1, How to Adjust the Limit Switch).
Part No. 97487 GTH-636 • GTH-644 • GTH-842 • GTH-844 • GTH-1048 • GTH-1056
Symptom:
Back-up alarm doesn't work when transmission in
reverse.
• Troubleshoot the back-up alarm and alarm
wiring.
Section 5 • Troubleshooting
TROUBLESHOOTING
5 - 13