Chevrolet 70 1969 Series, Shop Manual

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CAB A N D BO DY M OUNTINGS 1-33
TIL? CA B
Contents of this section are listed in index below:
Subject Page No.
Description .......................................... ..................................... ... . . . 1-33
Cab Tilting Instructions . . . . . . . . . . . . . . . . . . . . . . . 1-34
Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
Cab Mountings ................... ... 1-35
Seats ................................ .................................................. ... 1-38
Doors . ...................... . . . . . . . . . . . . . . . . . . . . . . . . 1-36
Cab Ventilation and Heating ................................................... ... 1-47
Cab Replacement . . . . . ............................................. 1-48
Torsion Bar Replacement . .......................... 1-50
Torsion Bar Tension Adjustment . . . . . . . . . . . . . . . . . . . 1-50
N O T E : Maintenance information on windshield wipers, windshield and
rear window glass replacement, and cab painting which are common to con­
ventional cab also is explained in " G E N E R A L M A I N T E N A N C E " section at
beginning of this group. Refer to LU B R IC A T IO N (SEC.
0)
for cab lubrication
information.
DESCRIPTION
T i l t type cab is u s e d on " T ” M o d e ls.
Typical interior view of tilt cabs is shown in figure
1.
Cab, which is of all steel welded construction,
fully surrounds engine and can be tilted
55
degrees
to expose engine for servicing. The cab tilting
mechanism is integral with cab front mountings
and tilting is accomplished by means of a torsion
bar extending across cab front hinge mountings.
One end of torsion bar is anchored to cab, whereas
opposite end is anchored to chassis. Cab is retain­
ed in lowered (operating) position by positive lock­
ing mechanism located at rear of cab.
Access for minor engine servicing, such as
oil and engine coolant, is accomplished without
tilting cab through access doors in panel at rear
of passenger seat and at top of seat back riser. A
concealed step is constructed in floor of each door
opening. Also, a central island shifting area that is
not disturbed with the cab tilting, is located be­
tween the seats. Island contains transmission shift
lever, hand brake lever and ignition or control
switch.
At upper rear of cab a seat back riser extends
entire width of cab.
The underside of cab is completely insulated
to deaden sound and prevent corrosion.
Figure 1 shows interior view of cab.
W IN D S H IE L D A N D R E A R W I N D O W
Two-piece windshield is retained in cab open­
ings with a one-piece rubber seal expanded into
position by a small rubber insert. No sealing com­
pound or cement is used. Rear window glass and
rear side glass is retained in same manner as
windshield glass.
W IN D S H IE L D W IP E R
Each section of windshield is equipped with
a n
individual electric wiper motor unit. Both single
speed wiper units are controlled
b y
a single dash
Figure I — Tilt Cab Interior (Typical!
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L