Chevrolet Light Duty Truck 1973 Service Manual page 131

3. Remove arm rest screws and trim panel. See figure
26.
4. Remove screws attaching ventilator lower assembly
to door panel.
5. Loosen inner to outer panel attaching screw
through access hole just rearward of the lower vent
pivot.
6. Slide door window glass rearward away from
ventilator.
7. Remove three screws at the upper front of the door
frame.
8. Turn vent assembly 90° and carefully remove by
guiding up and out. See figure 27.
Ventilator Glass Replacement
l . Using an oil can or similar means, squirt prepsol or
equivalent on the glass filler all around the glass
Fig. 27—Removing Ventilator Assembly
channel or frame to soften the old seal. When the
seal has softened, remove the glass from the
channel.
2. Thoroughly clean the inside of the glass channel
with sandpaper, removing all rust, etc.
3. Using new glass channel filler, cut the piece to be
installed two inches longer than necessary for the
channel. Place this piece of filler (soapstoned side
of filler away from glass) evenly over the edge of
the glass which will fit in the channel. The extra
filler extending beyond the rear edge of the glass
should be pinched together to hold it in place
during glass installation.
NOTE: One side of this filler (the outside of
the roll) is soapstoned. This is the side which
goes into the metal channel.
4. Brush the inside of the metal glass channel freely
with ordinary engine oil. This will enable the glass
and filler to slide freely into the channel. Push the
glass with the filler around it into the channel until
it is firmly seated. After the glass is firmly in place,
the oil softens the filler, causing it to swell, thereby
making a watertight seal. Trim off the excess filler
material around the channel and at the ends of the
channel.
NOTE: Glass should be installed so that rear
edge is parallel to the division post. Allow
full cure before water testing.
Installation
NOTE: Replace the door window glass and
regulate to the full down position before
installing the door ventilator assembly.
1. Lower the ventilator assembly into the door frame.
2. Make certain the rubber lip is positioned inside the
inner and outer panel before tightening screws.
3. Slide door glass forward engaging glass in vent
channel.
4. Reinstall all screws and tighten.
5. Install and tighten the three screws at the upper
front of the door.
Adjustment
1. Adjust the ventilator by placing wrench on
adjusting nut thru access hole and
to the desired tension. See figure 28.
window
2. After making adjustment bend tabs over the hex
nut on base of assembly. See figure 29.
3. Install arm rest screws and trim panel.
4. Install window regulator handle.
DOOR WINDOW ASSEMBLY—FIG. 30
Replacement
1. Completely lower glass to bottom of door.
BODY 1B-11
turning vent
LIGHT DUTY TRUCK SERVICE MANUAL