Lull 944E-42 Service Manual - Manual (Page 174)

Electrical System
9-16 944E-42
9.9 WINDOW WIPER/WASHER
WINDSHIELD WIPER MOTOR
9.9.1 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 8.7.9,
“Service Brake Valve,” or Section 8.7.11, “Power
Steering 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 batteries.
5. From the outside and front of the cab, remove the
nuts (1) and washers (2) from the motor shaft.
6. Disconnect the washer hose (3) from the hose
connector.
7. Remove the wiper arms (4), knurled driver (5) and
rubber cap (6) from the motor shaft.
8. Remove the metal hex jam nut (7) and metal
washers (8) from the motor shaft.
9. Tag and remove any hydraulic or electrical
components which will be in the way of removing the
wiper motor.
10. Remove the motor mounting bolts (9), pantographic
adapter (10) and gasket from the motor shaft.
Note: Retain all hardware removed from the wiper
assembly for possible reuse on the replacement motor
housing.
11. Disconnect the cab harness connector and the
ground wire from the wiper motor (11).
12. 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
Note: An assistant will be required for the installation of
the front windshield wiper motor.
1. Connect the cab harness connector and ground wire
to the wiper motor.
2. Align motor with the mounting holes and insert motor
through cab.
3. Have an assistant insert gasket, pantographic
adapter onto the motor shaft. Insert bolts through
front cab holes and thread into motor housing.
Tighten bolts.
4. Install metal washer and metal hex jam nut. Tighten
metal hex jam nut. Install rubber cap and knurled
driver onto the motor shaft.
5. Replace any hydraulic or electrical components
which were removed earlier to remove the wiper
motor
6. Properly connect the batteries.
7. With the ignition switch in the run position, press the
front wiper switch to the LOW position and then back
to the OFF position to “Park” the front wiper motor on
the left side of the windshield.
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