Chevrolet 70 1969 Series, Shop Manual

Page: 61 / 913

C A B A N D B O D Y MOUNTINGS 1-34
switch. Two separate switches control the two-
speed units.
D O O R S
Doors
are
hung
o h
swing-out type hinges with
the upper hinge
incorporating a spring-loaded door
check for holding door open. Door is supported at
the rear on cab sill by a spring-loaded striker
which is self-adjusting to carry weight of door.
A one-piece rubber
seal
completely
around
door seals door in cab opening.
Outside handles are of stationary-type having
a push-button type latch control in each handle.
The outside key lock is incorporated
in pushbutton
of left door handle. Locking of doors from inside
cab is accomplished by positioning remote control
handle to rearward detent.
Handles are screw-retained to door lock re­
mote control shaft
and
to
window regulator shaft.
Vent window in forward portion of door is of
friction type having a positive theft-resistant latch.
Friction mechanism consists of a nylon bushing on
lower pivot of vent which exerts frictional force
against tension clamp mounted to door paneling.
F R O N T O U TS ID E AIR IN T A K E
Outside air enters cab through a vent directly
in front of driver and through the outside air heat­
ing system. Air entry from outside of cab is made
through a louvered, removable panel, located in
front center of cab just above radiator grille open­
ing. Air flows through plenum chamber between
outer and inner cab paneling and is dispersed to
heater and vent outlet.
CAB M O U N T IN G
Cab is three-point mounted to chassis. Weight
of cab at the front is supported on the cab right
and left tilt hinges, and a single support bracket
having two rubber cushions, supports cab at rear
center. Cab tilt hold-down mechanism locks cab
firmly on cushions.
CAB TILTING INSTRUCTIONS
TO RAISE CAB
(Refer to Figure 2)
IM P O R T A N T : Before tilting cab forward, re-
id'- , i ->r position loose articles safely in cab; also
< J ' ransmission shift lever in neutral and apply
Li ake.
1. Close both doors of cab.
2. At right rear of cab remove safety chain
hook.
3.
While holding safety catch release rod to
the right, puli hold-down release lever out and up-
figure 2— Re/easing Cab Hold-Down Mechanism
ward until hold-down catch becomes disengaged
and rear of cab raises from mount. Tilt the cab
completely forward until check link at right front
mounting locks cab safely in full-tilt position.
IM P O R T A N T : Make sure check link is properly
engaged with frame anchor pin.
TO LOWER CAB
(Refer to Figure 2)
IM P O R T A N T : Before lowering the cab to oper­
ating position, make sure transmission shift lever
is in neutral position and that hand brake lever is
in the applied position.
1. Release check link at right front mounting
(see inset view) by pulling rearward on link r e ­
lease rod, then pull cab back to operating position.
2. Safety catch at rear of cab will automatic­
ally become engaged. Pull downward on hold-down
release lever and engage lower end of lever in
lever spring catch, bracket-mounted to rear of cab.
3. Engage safety hook through matching holes
in clip bracket and lug on lever by inserting the
chain hook from underside.
N O T E : The raising and lowering effort of cab
can be adjusted as desired by means of relocating
torsion bar anchor lever at left frame bracket. H
required, make adjustment as directed later under
"Torsion Bar Tension Adjustment."
CHEVROLET SERIES 70 8 0 H EAVY DUTY TRUCK SH O P M A N U A L