Chevrolet 70 1969 Series, Shop Manual

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C A E A N D B O D Y M O U N T IN G S 1-4
3. Install insert in center vertical seal (2-
piece windshield) in same manner previously des­
cribed in step 2.
N O T E :
If
desired, sealing cement can be ap­
plied between lip of seal and glass and seal lip at
cab opening flange,
REAR WINDOW GLASS REPLACEMENT
(ALL
CABS)
Rear window glass is retained by means of
rubber seal and seal insert (fig. 1)., No sealing
compound or cement is used.
If body prevents access to rear window, glass
can be installed from inside cab by reversing seal
so that insert is located inside cab.
1. Pry end of seal insert out of seal with a
pointed tool; then remove rubber insert completely.
ELECTRIC WINDSHIELD
Windshield wiper unit on all models is of
standard two speed electric type with windshield
washers,
A single wiper motor (figs. 3 and 4), mounted
at engine side of cab cowl, powers both wiper blades
on conventional cab models.
Two separate wiper motors are used -with ti.lt
cab models. Each wiper motor is bracket-mounted
to rear side of cowl under the dash. Figure 5
shows one of the units removed'.
A single control switch operates both single
speed wiper motors on tilt cab models whereas
figure 3— Wiper Motor installed (Cow. C ob Models)
Push glass from inside cab. Pull seal from opening.
2. If necessary, straighten any irregularities
of seal flange in cab opening which may have caus­
ed breakage of glass.
3. Install new rubber seal over panel flange,
pushing it completely into corners. Avoid stretch­
ing seal during installation. Cut seal to allow suf­
ficient overlap for a tight joint, then butt ends.
4. Position glass to seal and insert hood end
of installer tool (fig. 1) into seal groove. Move tool
around glass to force outer lip of seal over glass.
5. Thread end of rubber insert through handle
and loop of installer (fig. 1). Push tool loop and end
of insert into groove at bottom center of window.
Feed in the rubber insert while proceeding around
window. Use a hitching movement to avoid elong­
ation of insert.
6. Cut off end of insert, allowing sufficient
overlap for a tight joint; then butt into groove.
WIPERS A N D W ASHERS
separate control switches are used with two-speed
■wipers. The left wiper motor control switch knob
only, employes a push-type control button for the
operation of windshield washers.
All wiper motor units incorporate parking
switch contacts which keep the wiper circuit closed,
permitting blades to park even alter dash switch
is turned off.
Wiper motor electric circuits are shown in
figures 8 and 9.
WIPER A R M ADJUSTMENT
C O N V E N T IO N A L CAB M O D E L S
To adjust sweep of blades to provide maximum
visibility, turn on wipers, then note sweep of arms.
If necessary, remove one or both arms as follows:
Pull outer end of arm away from glass which will
trip lock spring at base of arm and release spring
from undercut of pivot shaft. While holding arm in
this position, pull outward on cap section at base
of arm to remove arm. A rm can be reinstalled in
any one of several positions due to serrations on
pivot shaft and in arm cap,
T IL T CAB M O D E L S (Refer to Fig. 6)
Wiper arm can be repositioned on pivot shaft
to provide proper sweep as follows:
Remove hex crown nut and washer which at­
tach wiper arm to knurled driver and pivot shaft.
Relocate arm on driver to desired position.
CHEVROLET SERIES 70 -80 H EAVY DUTY TRUCK SH O P M A N U A L