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BODY IB -40
balances the weight of the cab.
low ered (operatin g) position by a p ositive locking mecha
nism located at r e a r of cab (fig . 95).
A c c e s s fo r m in or engine se rvicin g ,
engine
coolant,
is
accom plished
through a ccess doors in panel at the r e a r of passenger
seat and on top of seat back r is e r . A central island con
BODY SHELL
CAB M O U N T IN G
Cab is three-poin t mounted with two p ivot-typ e mount
ings at fron t and twin cushion-type mountings at re a r.
R e fe r
to
F igu res
97 and 98 fo r view s
Attaching
bolts
at
fron t p ivot mountings should be
checked at reg u la r in terva ls fo r tightness. Loose mount
ings w ill allow shifting of cab and eventual fa ilu re of
other item s connecting cab to chassis. Front pivot mount
ings have fittin gs fo r lu brication purposes.
R ea r mounting has p ositive locking m echanism to r e
tain cab in n orm al operating position in rela tion to chas
sis fra m e.
The r e a r mounting also includes an additional
safety catch.
Cab hold-down catch shaft is equipped with a lu brica
tion fittin g.
A check link is p rovid ed near the right front mounting
which lim its the distance cab can be tilted fo rw a rd and
autom atically locks the cab in the fu ll-tilt position. Check
link must be re le a s e d b e fo re cab can be returned to n or
m al operation position.
Interconnected with the cab fron t mountings is a torsion
bar which is under load when cab is in eith er the op er
ating or fu ll-tilte d position. Right end of bar is anchored
to cab bracket and le ft end is anchored to fra m e bracket
as shown.
Bar is fr e e when cab is tilted part way, th erefore, to r
sion bar assists op erator in both the ra isin g and low erin g
of cab.
L U B R IC A T IO N F IT T IN G
CAB REAR
SU PP O R T
C A B H O L D - D O W N C A T C H
C A B REAR M O U N T I N G
C U S H IO N S
CAB REAR MOUNTING
The cab is retained in
such as o il and
without
tiltin g
cab,
SERVICE OPERATIONS
of mountings.
H O L D -D O W N C A T C H
RELEASE R O D
RETURN S P R IN G
SAFETY
C A T C H
C A T C H
RELEASE R O D
SAFETY
C H A IN
RELEASE
R O D LEVER
F ig . 9 7 —T ilt C ab M o u n tin g
tr o l panel (fig. 96) is located between the seats.
C ontrol panel contains transm ission shift le v e r, hand
brake le v e r, ignition switch and choke.
At upper re a r of cab a seat back r is e r extends en tire
width of cab.
The underside of cab is com pletely insulated to deaden
sound and prevent corrosion .
CA UTIO N:
Under no circum stances should the
bolts
which
attach
bracket to cab and the torsion bar le ft anchor
bracket to fra m e be rem oved when cab is in
operating, or fu ll tilt positions which is when
bar
is
loaded.
An
anchor bracket becom es fr e e
tw ist is allowed to re le a s e .
be rem oved sa fely when bar is unloaded, cab
tilted part way (approx. 45 d e gre es) as shown in
Figu re 99. N orm a lly it should n ever be neces-
sary to rem ove above mentioned bolts.
CAB ASSEMBLY
Removal
1. Disconnect battery ground strap.
g r ille and headlamp assem bly as described in s e c
tion 13.
2. Rem ove bumper and bumper f i l l e r panel.
3. Open heater tem peratu re control on dash to fu ll open
position, and drain ra diator. D isconnect heater hoses
at cab connections.
4. Disconnect a ccelera to r linkage and steerin g fle x ib le
coupling.
Disconnect brake lines and clutch line.
5. Disconnect speedom eter cable and all e le c tr ic con
nectors that junction cab with the chassis.
cab to chassis ground straps.
NOTE:
Rem ove or secu re loose item s in cab
before tilting.
P la c e shift le v e r in neutral and
hand brake in fu ll applied position.
CAB R IG H T
BRACKET
LU B R IC A T IO N
F IT T IN G
T O R S IO N BAR
R IG H T FRAME
SUPPO R T
BRACKET
C H E C K LIN K
A N D RELEASE R O D
CAB FRONT MOUNTING
torsion
bar
right anchor
injury could resu lt when
and torsion bar
Attaching bolts can
Rem ove radiator
Rem ove
CAB LEFT
BRACKET
LEFT FRAM E
S U PPO R T
BRACKET
CHEVROLET TRUCK SERVICE MANUAL
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