Chevrolet 10 1971 Series Chassis Service Manual page 405

Fig. 18— End Play Wear Washer Installation
Armature end play is controlled by end
NOTE:
play washers. See Figure 18 for proper assembly
of end play washers. Lubricate armature shaft
bushings with light machine oil.
Gear Box
1. Assemble gear box using reverse of disassembly
procedure.
The positive displacement washer pumps used on the
two-speed non-depressed park wipers (fig. 20) use a
pump mechanism consisting of a piston, piston spring
and valve arrangement driven by a 4 lobe cam, and
Removal and Installation
Removal of the washer pump
consists of:
1. Disconnect battery ground cable.
2. Disconnect defroster hose and move to one side.
3. Remove ignition switch from instrument panel as
follows:
a. Remove lock cylinder by positioning switch in
"ACC" position and inserting a wire in the small
hole in the cylinder face. Puch in on wire to
depress plunger and continue to turn key counter­
WINDSHIELD WASHER
GENERAL DESCRIPTION
SERVICE OPERATIONS
from the wiper motor
ELECTRICAL— BODY AND CHASSIS 12-19
Lubricate gear teeth with Delco Cam and
NOTE:
Ball Bearing lubricant or equivalent. Be sure
cover is properly located over dowel pins and be
sure to reinstall ground strap.
2. Place wiper in park position and install crank arm
on output shaft, rotate crank so alignment marks line
up with those on cover (fig. 19).
3. Replace retaining nut, place crank arm in vise,
tighten retaining nut.
follower assembly (fig. 22). The cam is attached to
one shaft of the wiper motor output gear (fig. 21). Pro­
gramming is accomplished electrically and mechanically
by a relay assembly and ratchet wheel arrangement.
clockwise until lock cylinder can be removed.
b. Remove ignition switch bezel.
c. Push ignition switch through dash and let hand.
4. Disconnect electrical connector and hoses from
pump.
Mark washer hoses for correct reinstal­
NOTE:
lation.
5. Remove two (2) pump mounting bolts.
Access upper right bolt through ignition
NOTE:
switch opening using suitable extension.
10-30 CHEVROLET TRUCK SERVICE MANUAL