Chevrolet 10 Series 1968, Service Manual, Page: 116 / 713

BODY IB-49
4. Install right hand body bracket clamp bolt and torque
to 65-75 ft. lbs.
5. Lubricate fittings on right hand frame bracket and
left hand body bracket and tilt the cab several times.
6. Move adjusting lever to required position following
instructions elsewhere in this section.
7„ Recheck torque of right hand body bracket clamp bolt
(65-75 ft. lbs.).
CAB REAR HOLD-DOWN AND SAFETY
LOCK ASSEMBLY
Proper adjustment and lubrication of the hold-down as­
sembly is of prime importance. Periodic inspection of
the condition and operation of the latch should be made
whenever the vehicle is lubricated. Details of hold-down
assembly mechanism may be seen in Figure 112. Note
that the length of the control handle connecting rod must
be adjusted to 22-7/8" from center of hole in clevis to
center of hole in rod to insure positive engagement of cab
lock in latch.
Check Link Assembly
Figure 113 illustrates check link assemblies. Cab
must be firm ly and safely supported before check links
are disassembled.
Application of machine or light engine oil to the pivots
and clevises whenever truck is lubricated is necessary
for proper operation. Always inspect condition and in­
stallation of return spring when servicing vehicle. Spring
must be in good operating condition and installed in the
frame hole exactly as shown in Figure 113.
CAB INSULATION
Undercoating, applied to cab understructure directly
over engine is highly resistant to abrasion and corrosion
and is designed to give maximum sound deadening and
insulation.
In the event repair, such as welding is required to that
part of cab covered with undercoating, it is first neces­
sary to remove the undercoating from that area.
IM PORTANT:
Before spraying new undercoat­
ing, clean area thoroughly.
FRONT END
WINDSHIELD GLASS
NOTE: When replacing a cracked windshield,
resulting from causes other than from flying ob­
jects, it is very important that the cause of
breakage be determined and the condition cor­
rected.
If cracks in glass extend to outer edge of glass, mark
cab or cowl with chalk at these points so that weather­
strip flange in cab opening can be examined later for
possible distortion.
CA U TIO N :
Always wear heavy gloves to pre­
vent possible injury when handling glass.
NOTE:
Each section of windshield glass is re ­
tained in place with insert-type rubber seal as
shown in Figure 114.
Removal
1. Pry end of insert out of vertical center seal with a
pointed tool; pull insert completely out of seal.
2. In same manner, remove insert from seal around
that section of glass which is to be removed.
3. With aid of an assistant to hold glass, push glass fo r­
ward from inside cab.
Checking Windshield Opening
If it is suspected that the windshield opening has been
distorted through collision damage, or if the vehicle has a
history of windshield "strain breaks", the windshield
opening should be checked as follows:
1. Remove windshield, rubber seal and all foreign ma­
terial from windshield frame.
2„ Place a new windshield glass in opening without rub­
ber seal.
3. Install checking blocks, Special Tool J-9316, equally
spaced around perimeter of opening. Blocks may be
installed by inserting them between glass and metal
from outside of cab with the two notches toward in­
side of cab. Blocks are then rotated 1/2 turn so that
wide notch engages glass and narrow notch engages
pinchweld.
Installation
1. If necessary, pull rubber seal from glass opening,
then examine opening flanges for irregular surface
which could cause glass breakage. Straighten flanges
if necessary.
2. Reposition rubber seal on flange. Raise new glass
to outside of seal, then with hook end of installer
Tool (J-2189) in glass groove of seal as shown in
Figure 114 move tool around glass to force outer lip
of seal over edge of glass.
3. Thread end of rubber insert through handle and loop
of installer tool (fig. 114). Pull tool loop and end of
insert into groove of seal. Feed in rubber insert,
while proceeding around window. Use a hitching
movement of tool to avoid elongating insert. If new
insert is being used, cut off insert allowing sufficient
overlap to tight joint; then butt into groove.
4. Install insert in center vertical seal in same manner
previously described in Step 3.
REAR VIEW MIRROR
Figure 115 shows installation of rear view m irror on
left door assembly. Note that m irror head should be in­
stalled so that drain holes are at the bottom.
BODY VENTILATION
Outside air enters cab through a vent (fig. 116) directly
in front of driver and through the outside air heating sys­
tem. A ir entry is made through a louvered, removable
panel, located in center of front end just above grille
opening. A ir flows through plenum chamber between
outer and inner cab paneling and is dispersed to heater or
vent outlet as desired.
Figure 117 illustrates construction of fresh air ventilat­
ing assembly. For ease of operation, the spring, rod and
tube shown in View "A " should be lubricated with machine
or light motor oil whenever vehicle is lubricated.
CHEVROLET TRUCK SERVICE MANUAL