3-17
Published 11/26/2014, Control # 447-05
RT770E SERVICE MANUAL ELECTRICAL SYSTEM
washer, and tapered sleeve securing the wiper arm to
the pivot shaft kit. (The nut, washer, and sleeve are part
of the pivot shaft kit.)
6. Remove the wiper arm from the pantograph adapter kit
and the pivot shaft kit.
7. Remove the flanged sleeve, nut, and two flat washers
from the pivot shaft kit. (The sleeve, nut, and washers
are part of the pivot shaft kit.)
8. Remove the two capscrews and lockwashers securing
the pantograph adapter kit’s adapter to the cab exterior.
Remove the pantograph adapter kit’s adapter and
gasket.
9. Remove attaching hardware to free the windshield wiper
motor bracket from the cab interior. Remove the bracket,
with motor and pivot shaft connected, from the cab.
NOTE: You may have to remove or move other parts to get
the bracket and attached parts around the steering
column. Take care not to damage any parts.
10. Remove the nut to free the wiper motor’s shaft from the
wiper motor kit crank. Remove the three screws and
washers to free the wiper motor from its bracket.
Remove the wiper motor from its bracket. Leave the
other parts attached to the bracket for now.
Inspection
1. Visually check the motor housing for evidence of cracks
or other damage. Check for excessive shaft end play
indicating worn or damaged bearings. Replace motor if
damaged.
2. Inspect the wiper blade for serviceability. Replace wiper
blade when worn.
3. Inspect the wiper arm and parts of the linking component
kits (pantograph adapter kit, pivot shaft kit, wiper motor
kit link and crank, wiper motor bracket) for damage.
Replace as needed.
Installation
1. Verify the pivot shaft and the wiper motor kit link and
crank are in place on the motor bracket. (Washers and
clip springs fasten the link to the pivot pins on the crank
and the pivot shaft. The pivot shaft’s pivot pin mounts in
the hole nearest the end of the pivot shaft’s lever.)
2. Connect the wiper motor to the motor bracket with
screws and washers (see Figure 3-10). Connect the
wiper motor’s shaft to the wiper motor kit crank with the
nut and washer.
3. Secure the adapter and the gasket of the pantograph
adapter kit to the cab exterior with capscrews and
lockwashers.
4. Install the motor bracket and attached parts in the cab
interior with attaching hardware. Ensure the pivot shaft
sticks through the hole in the pantograph adapter kit.
NOTE: Take care not to damage any parts while moving
the bracket and attached parts around the steering
column.
5. Secure the pivot shaft to the pantograph adapter with the
pivot shaft kit’s nut and washers. Install the flanged
sleeve on the pivot shaft.
6. Install the wiper arm on the shafts of the pantograph
adapter kit and the pivot shaft kit. Secure the wiper arm
to the pantograph adapter kit shaft with the kit’s own
washer and cap nut. Secure the wiper arm to the pivot
shaft with the pivot shaft kit’s own tapered sleeve,
washer, and cap nut.
7. Connect the wiper arm’s washer hose to the washer
nozzle fitting assembly.
8. Connect the electrical leads to the wiper motor as
marked before removal.
9. Turn the battery disconnect switch to the ON position.
Check
1. Squirt some cleaning fluid onto the windshield with the
windshield washer.
2. Operate the windshield wiper. Verify it works. (Replace
wiper blade as needed if it streaks or otherwise wipes
poorly.)
FIGURE 3-10
3653
Windshield Wiper Arm
Washer
Nuts
Washer
Screws
Mounting Bracket
Serrated Collar
Mounting Plate
Gasket
Motor
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