Lull 944E-42 Service Manual - Manual (Page 176)

Electrical System
9-18 944E-42
3. With the help of an assistant, insert the wiper motor
through the roof hole and have the assistant thread
the nut onto the wiper motor shaft. Ensure that the
motor housing is facing the front of the cab.
4. Secure the tab of the plastic case using the
previously removed screw and acorn nut.
5. Tighten the motor shaft nut (1).
6. Install the wiper arm (2) onto the wiper motor
shaft (3).
7. Connect washer hose (4) to top hose fitting.
8. Properly connect the batteries.
9. Turn the ignition key to the RUN position and turn
skylight wiper switch to the ON position. Ensure
wiper stays on the window through a full stroke. Turn
the skylight wiper switch to the OFF position.
10. Engage the washer switch and ensure washer fluid
is sprayed on the skylight window. Turn the ignition
key switch to the OFF position.
11. Close and secure the engine cover.
9.9.3 Rear Wiper Switch/Motor
a. Removal
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. Remove the rear wiper arm from the rear wiper
motor shaft.
6. From inside the cab, remove the phillips screw (5),
washers and acorn nut (6) securing the right side of
the plastic case and wiper motor to the rear window.
7. From the outside of the cab, remove the nut (7) and
hardware from the wiper motor shaft.
8. Open the plastic case, label and disconnect the cab
harness and two jumper wires from the wiper motor.
9. Remove the wiper motor assembly from the machine
and disconnect the two jumper wires running
between the wiper motor switch and the wiper motor.
10. Carefully pry the wiper motor switch from the plastic
case.
b. Disassembly
DO NOT disassemble the motor or the wiper motor
switch. The motor and switch are not serviceable.
Replace motor or switch if either are found to be
defective.
c. Inspect and Replacement
Inspect the motor terminals for continuity. Replace motor
if continuity is not found. Inspect the switch terminals with
the switch in the OFF and ON positions. Replace the
switch if continuity is not found.
d. Installation and Testing
Note: An assistant will be required for the installation of
the Rear Wiper Switch/Motor.
1. Install the wiper switch into the plastic case.
2. Reconnect the previously labeled jumper wires
between the switch and motor.
MU6151
1
2
3
4
FRONT
MU6171
6
5
7
FRONT