Chevrolet 70 1969 Series, Shop Manual

Page: 62 / 913

CAB AND BODY
MOUNTINGS
1-35
INSULATION
Insulation, applied to cab understructure di­
rectly over engine, is highly resistant to abrasion
and corrosion and is designed to give maximum
sound deadening and insulation.
In tne event repair, such as welding is requir­
ed to that part of cab covered with insulation, it is
first necessary to remove the insulation from that
area. After completing repair, insulation sections
can be cut to size and cemented over the repaired
area (fig. 3).
IM P O R T A N T : Clean area
thoroughly before installing
new section of insulation.
Figure 3— Applying Insulation Strip
CAB MOUNTINGS
Cab is three-point mounted with two pivot-type
mountings at front and twin cushion-type mountings
at rear. Refer to figure 4 for typical views of
mountings.
Interconnected with the cab front mountings is
a torsion bar (fig. 4) which is under load when cab
is in either the operating or full-tilted position.
Right end of bar is anchored to cab bracket and
left end is anchored by lever to frame bracket as
shown in figure 4.
Bar is unloaded when cab is tilted approxi­
mately 45°, therefore, torsion bar assists operator
in both the raising and lowering of cab.
C A U T IO N : U N D E R N O C IR C U M ­
S T A N C E S S H O U L D T H E BO LTS W H IC H
A T T A C H T O R S IO N BAR R IG H T A N C H O R
B R A C K E T T O CAB A N D T H E TORSION
BAR L E F T A N C H O R L E V E R T O F R A M E
BE L O O S E N E D O R R E M O V E D W H E N
CAB IS IN O P E R A T IN G O R F U L L T IL T
POSITIONS W H IC H
IS W H E N BAR IS
L O A D E D . A N IN JURY C O U L D R E S U L T
W H E N A N C H O R B R A C K E T B E C O M E S
F R E E A N D T O R S IO N BAR T W IS T IS A L ­
L O W E D T O R E L E A S E . Attaching bolts
can be removed safely when bar is un­
loaded, cab tilted part way (approx. 45
degrees). Normally it should never be
necessary to remove above mentioned
bolts.
Lubr«co1ion Fitting
C ab H old-Dow n Catch
C A B FRO NT M O U N T IN G C A B REAR M O U N T IN G
Figure 4— Cab Mountings
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L