JLG G12-55A Service Manual - Manual (Page 170)

Electrical System
9-28 G10-55A, G12-55A
9.8 WINDOW WIPER/WASHER
WINDSHIELD WIPER MOTOR
a. Removal
Note: It may be necessary to remove several hydraulic
hoses from behind the dash in order to remove and
install the wiper motor housing. (Refer to Section 4.3.1,
“Steering Column and Orbitrol Valve.”)
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL, engage the park brake and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Properly disconnect the battery.
5. Remove the screws that secure the main dash
panel. Pull out the dash panel to gain access to the
wiper motor (3).
6. Disconnect the cab harness connectors from the
wiper motor.
7. Remove the linkage attached to the wiper motor.
8. Loosen and remove the four bolts holding the wiper
motor to the mounting bracket.
Note: Retain all hardware removed from the wiper
assembly for possible reuse on the replacement motor
housing.
9. Remove the motor from the inside of the cab.
b. Disassembly
DO NOT disassemble the motor. The motor is not
serviceable. Replace motor if found to be defective.
c. Inspection and Replacement
Inspect the motor terminals for continuity. Replace motor
if continuity is not found.
d. Installation and Testing
1. Install all required hardware to the motor assembly.
2. Align motor with the mounting holes and bolt the
motor to the mounting bracket.
3. Connect the wiper linkage to the wiper motor shaft.
Note: Align the wiper linkage arm with the flat on the
motor shaft to ensure wiper stroke covers window area,
and it does not swipe past the glass area.
4. Connect the cab harness connectors to windshield
wiper motor connectors.
5. Replace the main dash panel to its original
orientation. Secure with the previously used screws.
6. Properly connect the battery.
7. Turn ignition key switch to the RUN position, and
operate windshield wiper in both LOW and HIGH
speeds to ensure proper operation and that correct
wiper travel is achieved.
8. If previously removed, install hydraulic hoses under
the dash. (Refer to Section 4.3.1, “Steering Column
and Orbitrol Valve.”)
9. Close and secure the engine cover.
10. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
MY0440
3