GMC 4000 Series Service Manual page 42

1 / 1 6 " BELOW LINE
SCRIBE H O R IZO N TAL
LINE THROUGH
CENTER OF LOCK ''V ''
After obtaining proper height adjustment, pro­
ceed to make "Door Rear Edge "In" or "Out" Ad­
justment."
Door Rear Edge "In" or "Out" Adjustment
This adjustment is for purpose of aligning the
rear surface of door flush with adjustment surfaces
of cab. If surfaces are not flush, proceed as follows:
1. Mark a horizontal line on cab pillar at top
of striker bolt base washer or spacer.
2. Loosen striker bolt slightly, then tap against
bolt base washer, to move bolt "in" or "out" as
necessary to locate door surface flush with cab
surface when door is closed. Before tightening the
striker bolt make sure top of bolt base washer is
contacting the horizontal mark on cab pillar. Final
tighten striker bolt.
Two rubber bumper blocks are inserted into
door rear edge panel to absorb closing shock and
to lim it the "in" adjustment. If bumper blocks are
deteriorated or damaged otherwise, they should be
replaced. Pull blocks from door to remove. A flat -
bladed tool, such as a putty knife, can be used for
installing blocks in manner shown in figure 10.
DOOR CHECK REPLACEMENT
IMPORTANT: Do not allow door to swing be­
yond the normal full-open position when the check
strap is disconnected.
1. Using a small punch, drive spring pin up
from bottom of strap bracket (fig. 11).
2. Remove the two screw and washer assem ­
blies which attach the check strap catch to door.
G M C S E R V I C E M A N U A L
APPLY PAINT OR GREASE
TO EDGE OF LOCK C A M
STRIKER BOLT M A RK
IN PAINT OR GREASE
Figure 9 — Striker Bolt A lignm ent Points
CONVENTIONAL CAB
STRIKER BOLT
Remove check assembly.
3. Attach check assembly to door, then con­
nect check strap to cab bracket with spring pin,
which must be installed from top side.
DOOR WEATHERSTRIP
REPLACEMENT
Door weatherstrip is retained to cab opening
with adhesive cement. Weatherstrip at bottom of
door opening is retained by the sill plate shown in
figure 12.
1. Remove weatherstrip, then scrape all old
cement from cab flange.
Figure 10— Installing Rubber Bum per in Door
Sec. 1
Page 35
DAB OF PAINT
OR GREASE
D O O R STRIKER
C A M M ARK
RUBBER BUMPER