GMC 4000 Series Service Manual page 61

Sec. 1
Page 54
TILT CAB
Figure 10— Striker Bolt Alignm ent
are available in two thicknesses: 5/64-inch and
5/32-inch. Make sure the thin plastic washer is
located next to cab pillar.
After obtaining proper fore and aft adjustment,
tighten bolt snug only at this time and then proceed
with the "Striker Bolt Height Adjustment."
Striker Bolt Height Adjustment
This adjustment is important to assure that
the right proportion of door's weight will rest on
striker bolt when door is closed. If bolt is posi­
tioned too high on pillar, rapid wear will occur to
the lock cam: if too low, an extra load will be
placed on door hinges as well as pull door down­
ward and out of alignment.
Generally the striker bolt height adjustment
can be checked quite accurately by just sighting
the center of "V" slot on door with the center of
striker bolt as illustrated in figure 9. However,
REAR GASKET
REINFORCEMENT
PLATE
ATTACHING BOLTS
Figure 11— D oor H an d le Installation
G M C S E R V I C E M A N U A L
to make a more positive check, perform the fol­
lowing:
"V" slot and on door lock cam as shown in left
view of figure 10.
edge of lock cam as shown in same view.
the striker bolt to leave an impression in grease.
Open door and check contact mark on edge of cam.
Mark should be located approximately 1/16-inch
below the horizontal mark if properly aligned.
striker bolt up or down by tapping on the washer
or spacer at base of striker bolt. DO NOT TAP
ON HEAD OF BOLT.
Door Rear Edge "In" or "Out" Adjustment
HANDLE
rear surface of door flush with adjacent surfaces
of cab. If surfaces are not flush, proceed as follows:
of striker bolt base washer or spacer.
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 bolt base washer is
contacting the horizontal mark on cab pillar. Final
tighten striker bolt.
FRONT GASKET
REMOVAL
panel to lower portion of door. Remove access
panel.
DEPRESS RETAINER
THEN ROTATE
Figure 12— D isenga gin g Handle Spring Retainer
1. Mark a horizontal line through center of
2. Smear some grease or paint on contact
3. Slowly close door until cam barely contacts
4. If necessary, raise or lower the loosened
This adjustment is for purpose of aligning the
1. Mark a horizontal line on cab pillar at top
2. Loosen striker bolt slightly, then tap against
DOOR OUTSIDE HANDLE
REPLACEMENT
1. Remove eight screws which attach access