Chevrolet 70 1969 Series, Руководство по ремонту

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REAR SUSPENSION 4B-32
2. Support the saddle assembly from under­
neath to prevent damage or personal injury during
removal of the vertical drive bushing caps.
3. Remove the vertical drive bushing caps,
and remove the vertical drive pin nuts and flanged
■washers.
4. Remove saddle (s) and load cushions from
vertical drive pins.
V E R T I C A L D R IVE BUSHING R E P L A C E M E N T
1. Press old bushing out, using a suitable
sleeve to exert force from the top of the saddle.
I M P O R T A N T : If the outer sleeve is frozen
to the saddle wall, press the inner sleeve and
rubber bushing out of the saddle and work the
outer sleeve out of the saddle. Do not cut sleeve
with torch or use heat as saddle is heat-treated.
2. Clean the bushing cavities in the saddles
with solvent and remove any nicks with emery
cloth.
3. Coat saddle cavities and outer sleeve af
new vertical drive bushing with rust-proofing
compound.
4. Install new bushing in saddle.
N O T E :
This bushing is not a pressed fit and
new bushings can be hand pressed.
L O A D CUSHIONS
Visual inspection will determine necessity for
replacement. If the load cushion is cut or
damaged, it will lose its load-carrying capacity
and replacement should be made.
The free height (no load) of the load cushion
is 3-15/l6-inches and it is possible that a perm­
anent set could result in service. Whenever a
saddle(s) is removed from the vehicle for any
reason this free height should be checked. If a
permanent set of not more than 1/4 inch is noted,
the cushion is still considered acceptable for
re-use.
N O T E : This means that a load cushion with
a free height of less than 3-11/16-inches should
be replaced.
S A D D L E IN S T A L L A T IO N
1. Install the vertical drive bushing caps.
Tighten nuts to 100-125 foot-pounds torque.
2. Position load cushions on saddle(s).
3. Support saddle assembly from underneath
to prevent damage or personal injury during in­
stallation. Position saddle(s) on vertical drive
pins and install flanged washers (flange down) and
nuts. Tighten vertical drive pin nuts to 175-225
foot-pounds torque.
4. Install equalizing beams and cross tube
as described later under “ Equalizing Beam
Installation.”
Bolt
Adapter
End Bushing
Equalizing Beam
Bolt Nut
Center Bushing
Washer
Figure 13— Equalizing Beam Components (Typical)
EQUALIZING BEAM REMOVAL
AND REPAIR (ALL MODELS)
The following procedures cover removal and
installation of either equalizing beam without
removing any
other units of the suspension
system. When removing an axle assembly, ac­
complish only steps required to loosen axle at
each end of beam.
E Q U A L IZ IN G B E A M R E M O V A L (Fig. 13)
1. Raise and support frame to remove weight
from beams.
2. At axle brackets, remove nuts (5), washers
(7), and bolt (1). Pry adapters (2) from bushings
and brackets.
3. With blocking under beam cross tube (fig.
14 or 15) to support weight of beams, remove
saddle caps (fig. 8 or 9) attached with four nuts
and special flat washers.
4. Lower the cross tube and beams, then
slide beams from tube ends.
E Q U A L IZ IN G B E A M IN SPEC T IO N
1. Inspect beam end bushings and beam
center bushing for evidence of damage or deteri­
oration of the rubber. If any damage is evident,
replace bushings as directed under "Equalizing
Beam Bushing Replacement’ ' later in this section.
2. Inspect cross tube and replace if bent or
worn.
E Q U A L IZ IN G B E A M BU S H IN G R E P L A C E M E N T
Press old bushing out, using a suitable driver
or press to exert force on bushing outer sleeve.
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L