Chevrolet 70 1969 Series, Shop Manual

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C A B A N D BO DY M O U N T IN G S 1-50
Figure
33— Cab Torsion Bar Stop Brackets Installed
3. Install torsion bar anchor lever over end of
bar and into frame bracket.
N O T E : Lever should be located on bar so that
opposite end of anchor lever is located near cen­
ter of serrations on cab bracket (fig. 32).
4. Install cab stop brackets (if previously re­
moved) to torsion bar cab and frame brackets as
shown in figure 33. Torque attaching bolts to 35
to 50 foot-pounds. Make sure stop brackets are
installed as shown.
5. Install torsion bar right frame bracket cap
and cab left support cap with two bolts and wash­
ers. Torque bolts to 35 to 50 foot-pounds.
6. Tighten bolt which clamps cab right mount­
ing bracket to end of torsion bar (shown in figure 28)
to 65 to 75 foot-pounds.
7. Lubricate all cab tilt lubrication fittings
with lubricant specified in LU BR IC ATION (SEC. 0).
8. Raise and lower cab to check operation. If
cab rises too fast from operating position or if
considerable effort is required to raise cab, make
torsion bar tension adjustment as directed under
"Torsion Bar Tension Adjustment."
TORSION BAR TENSION ADJUSTMENT
(Refer to Figure 32)
1. Tilt cab forward to an angle whereby the
torsional load is removed from torsion bar. Usual­
ly the bar will become unloaded when cab is tilted
45 to 50 degrees.
N O T E : This unloaded angle position will vary
slightly on different vehicles.
IM P O R T A N T : Before continuing, check tight­
ness of screw which clamps cab right mounting
bracket to torsion bar. Tighten screwfirmly O N L Y
when torsion bar is unloaded - cab tilted part way.
If screw is loose, cab bracket may fracture when
torsion bar is loaded.
2. S A F E L Y support cab at angle at which tor­
sion bar becomes unloaded.
N O T E : An overhead hoist is recommended for
supporting cab in this position as it will allow cab
to tilt slightly fore or aft to facilitate alignment
of torsion bar anchor lever to cab frame bracket.
3. Loosen nut on bolt which attaches the anchor
lever and serrated spacer block to the cab frame
bracket.
N O T E : Loosen nut only enough for spacer to
clear serrations.
4. By tilting cab slightly fore and aft, the
small serrated spacer block can be relocated to
new related serrations on cab frame bracket as
desired.
5. Tighten anchor bolt nut firmly.
6. Check cab tilting action. If necessary, re­
position anchor point of torsion bar anchor lever
as directed above.
N O T E : If adjustment is such that cab rises
rapidly to full-tilt position, damage to cab check
link could occur and also upon lowering of the cab
to operating position, considerable effort may be
required.
IM P O R T A N T : Final check tightness of anchor
lever bolt nut.
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L