GMC 4000 Series Service Manual page 48

Figure 2 3 — Replacing Door W in d o w Class Assem bly
door and rotate it to locate in position (fig. 22).
2. Make sure that the rubber lip around for­
ward portion of vent is properly mated over door
vent opening contours.
3. Install two screw s attaching lower channel
portion of vent assembly to door inner panel brac­
ket (fig. 21).
4. Referring to figure 21, install three screws
to attach vent frame to door structure.
5. Adjust the vent opening and closing tension
as directed previously under "Door Vent Window
Tension Adjustment."
6. Install door access panel.
DOOR W IN D O W GLASS
REPLACEMENT
REMOVAL
1. Remove the vent window assembly as di­
rected previously under "Door Vent Window A s­
sembly Replacement."
2. Regulate window to two-thirds closed posi­
tion.
3. Disengage the glass from the regulator
guide by positioning the roller at the guide openings
and then lifting out the window (fig. 23).
4. If desired, the horizontal seal strips can
be replaced using a flat-bladed tool to pry strips
from door as shown in figure 27.
5. Also if desired, the door glass run channel
assembly can be removed at this time. Pull run
channel from door.
6. To replace the glass in glass channel per­
form the following:
a. Squirt gasoline along glass filler on both
sides of glass to soften seal. Remove glass from
G M C S E R V I C E M A N U A L
channel when filler is sufficiently soft. Pull rubber
filler from channel.
removing all rust and foreign matter.
three thicknesses - 0.037", 0.047", and 0.057" for
select fit between glass and channel.
longer than channel. Position filler (soapstone side
away from glass) around glass.
cation of liquid soap solution to facilitate install­
ation. DO NOT USE GREASE OR OIL.
ly seated.
equal distance from edge of glass (fig. 24) and that
regulator arm slot in channel, is facing the right
direction in respect to rounded and squared corn­
ers at upper edge of glass. Trim off excess filler
material along channel and at ends.
INSTALLATION
door framing, install channel by pressing run
channel into place around door frame.
removed from door, p ress new seal strips into
position making sure all strip attaching clips are
fully engaged.
(fig. 23).
ulator arm. NOTE: Regulator arm should be in
CONVENTIONAL CAB
b. Thoroughly clean inside of glass channel,
c. Window glass rubber filler is supplied in
d. Cut new piece of channel filler slightly
e. Brush inside of channel with a light appli­
f. P ress channel on filler and glass until firm ­
IMPORTANT: Make sure channel ends are
1. If glass run channel was removed from
2. If the glass horizontal seal strips were
3. Lower the door window assembly into door
4. Engage glass channel on the roller of reg­
Sec. 1
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