Chevrolet 10 1971 Series Chassis Service Manual page 404

ELECTRICAL— BODY AND CHASSIS 12-18
assembly as follows:
a. Unsolder motor leads from terminals. Code motor
leads.
b. Drill out rivets securing terminal board and park
switch ground strap to mounting plate.
Screws, nuts and washers for attaching
NOTE:
a replacement terminal board park switch as­
sembly are included with the replacement as­
sembly.
Motor
1. Follow Steps 1 through 7b under gear box disasembly.
2. Remove motor through bolts, tap motor frame lightly,
and remove motor from mounting plate.
3. Remove brush spring tension (fig. 17), slide armature
and end plate from motor frame. Pull end plate from
armature.
Thrust plug located between armature
NOTE:
shaft and end plate.
4. Remove end play adjusting washers from armature,
noting arrangement for proper reinstallation.
WIPER M OTOR INSPECTION
Check and inspect all parts for wear, replace as neces­
sary. All parts can be replaced individually except motor
frame and field, which is serviced as an assembly.
Service kits also provide screws, nuts and washers to
replace gear cover and terminal board rivets.
WIPER MOTOR ASSEMBLY
Refer to Figure 17 for exploded view of motor and gear
train.
1. Nut
2. Crank Arm
3. Seal Cap
4. Retaining Cap
5. Washer
6. Gear Box Cover
Fig. 17— Wiper Motor & Gear Box Assembly
7. Output Gear and
Shaft Assembly
8. Intermediate Gear
9. Wave Washer
10. Gear Box Housing
Fig. 16— Wiper Motor Installation - Conventional Cab
Motor
Reassembly motor using reverse of disassembly pro­
cedure.
11. Brush Plate Assembly and
Mounting Brackets
12. Brushes
13. Wave Washers
14. Flat Washers
15. Armature
16. Thrust Plug
17. Frame and Field
18. End Plate
19. Tie Bolts (Two Required)
10-30 CHEVROLET TRUCK SERVICE MANUAL