Chevrolet 70 1969 Series, Shop Manual

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CAB A N D BO D Y M O U N T IN G S
1-46
to remove old glazing rubber, rust, or other for­
eign matter.
2. Brush
inside
of channels freely with light
engine oil.
3. Position new glazing rubber (soapstone side
away from glass) around edge of glass. Press glass
with glazing rubber into lower channel, then press
upper channel over top of glass. Make sure chan­
nels are firmly seated, then install two small
screws which attach channels together.
4. If necessary, trim glazing rubber at ends
of channels and along sides of channel each side of
glass.
5. If necessary, seal cracks at latch bracket.
6. Insert pivot stud of vent lower channel into
hole of vent frame as shown in figure 24. Through
small access hole at top of door, install vent up­
per pivot screw. Install two screws which attach
bracket of vent channel to glass division channel
just below vent latch.
7. Install special flat washer, nylon friction
bushing, and friction clamp on vent lower channel
pivot shaft, positioned as shown in figure 23.
N O T E : Make sure that tab on special flat
washer is positioned properly to act as a stop of
vent when it is in full open position. Attach fric­
tion clamp to vent lower frame with screw. Tight­
en screw (fig. 23) to obtain two to four pounds
torque while moving vent window from a ten de­
gree open position to a full-open position. Use
either a push or pull type spring scale positioned
at rear edge of glass.
N O T E : Tightening clamp screw increases
operating tension.
8. Install access panel to inner side of door.
DOOR GLASS RUN CHANNEL
REPLACEMENT
1. Remove door window as explained previ­
ously under "Door Window Glass Replacement."
2. Pull down on end of run channel at vent
window, then using a flat blade screwdriver be­
tween channel and door, detach channel retaining
clips.
Figure 25— Vent W indow Disassembled
3. Making sure clip is detached at bottom of
channel, pull channel from door framing and run
channel retainer near bottom of door.
4. Install run channel into door framing and
channel retainer. Make sure channel retaining
clips are fully engaged.
5. Install door window glass as explainedpre-
viously under "Door Window Glass Replacement."
DOOR W IN D O W GLASS HORIZONTAL
SEAL REPLACEMENT
1. Remove access panel (8, fig. 16) from bot­
tom of door. This will remove window stop attach­
ed to access panel and allow top of window to be
lowered to a point below horizontal weatherstrips.
2. Using a flat-blade screwdriver, pry wea­
therstrips from door.
3. Install weatherstrips to door, making sure
retaining clips are fully engaged.
4. Raise window, then install access panel (8,
fig. 16) to bottom of door.
CAB VENTILATION AND HEATING
VENTILATION
can be directed into cab interior through opening
at front of driver and through opening at front of
A single grilled intake at front center of cab passenger. When heater is used, the outside air
(fig. 26) permits outside air to enter plenum enters heating system through the right side
chamber located between the cab outer and inner opening.
panels. From the plenum chamber, outside air The outlet located ahead of driver is opened
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L