Chevrolet CHEVY VAN G10 SERIES Service Manual page 318

- BODY
E L E C T R IC A L A N D
Fig. 2 8 —A rm ature Inserted in Case Assembly
This will insure proper alignment o f the new case with
the scribed line made on the housing. (Step 1 under
Brush Plate Removal.)
9. Position armature worm shaft inside the housing and,
using the scribed reference marks, line up as near as
possible the case and field assembly with the housing.
10. Maintaining the armature in its assembled position in the
case, start the armature worm shaft through the field and
housing bearing until it starts to mesh with the worm
gear. At the same time, carefully pull the excess black
and black and pink stripe leads thru the housing
grommet.
Fig. 2 9 —Partially Assembled Brush Plate
CHASSIS 12-18
C A U T IO N : It may be necessary at this point to
rotate armature slightly before the arm ature worm
w ill engage w ith worm gear teeth.
11. Rotate the case as required to align the bolt holes in the
case with those in the housing.
12. Secure the case to the housing with the tw o tie bolts.
13. Adjust armature end-play as described under Wiper
Adjustments.
ADJUSTMENTS
a. Armature End-Play
1. Loosen adjusting screw locknut (Figure 22) and
tighten the adjusting screw until finger tight.
b. Gear Assembly End-Play
1. Add end-play washers as required to obtain .005"
minimum end-play (Figure 22).
WASHER PUMP U N IT
The washer pump and/or valve assembly may be removed
from the wiper assembly as a unit; therefore, it is not
necessary to remove the wiper assembly from the vehicle if
only the washer pump and/or valve assembly requires service.
When the pump is removed from the wiper assembly, all
working parts are readily accessible and may easily be serviced
as necessary (Figure 30). A cross-section o f the washer pump
valve assembly is shown in Figure 31.
VALVE RELAY
ASSEMBLY ARMATURE
RATCHET
'E' RING
Fig. 3 0 —Washer Pump Assembly
ARMATURE
SPRING
PAWL
SPRING
RATCHET PAWL
C H E V Y V A N SH O P M A N U A L