Chevrolet 70 1969 Series, Руководство по ремонту

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REAR SUSPENSION 4B-30
axle to prevent axle assemblies from rolling or
pivoting at equalizer beam ends when torque rods
are disconnected.
7. Measure length of adjustable type torque
rods on steel tilt models and front torque rod on
R T suspension to assure same dimension at in­
stallation; then at each axle end, remove nut from
torque rod end stud and drive end stud out of axle
bracket using a soft hammer.
8. Using a suitable hoist, raise rear end of
frame and roll axles, with equalizer beams and
springs, out from under frame.
R E M O V A L —RS-380 T Y P E (Refer to Fig. 10)
1. On the RS-380 rubber cushion type sus­
pension the first two steps of the above R T and
R U procedure apply with the exception of re­
moving front duals. It is also necessary to ac­
complish the following:
2. Remove the 28 side and lower suspension
hanger attaching bolts securing hangers to frame.
3. With axle housings secured safely, dis­
connect torque rods at axle ends by removing nuts
then driving ends from brackets with soft drift
and hammer.
4. Raise frame until sufficient clearance
exist, then carefully roll entire assembly from
under frame.
5. Lower frame to safety stands or other
suitable supports.
IN S T A L L A T IO N R T A N D RU T Y P E
1. Roll axles and wheels, with equalizer
beams and springs attached, in position under
frame.
2. Lower frame as required to align spring
front pin with bracket raise and support forward
axle then remove wheels. Install spring front pin
through bracket and spring eye, with milled flat
near end of pin aligned with lock bolt hole in
bracket. Use a soft hammer to drive pin in.
3. Install spring front pin lock bolt and nut
and tighten firmly. Install lubrication fitting in
inner end of pin.
4. Install rebound bolt in rear bracket.
5. Install torque rods to axle brackets.
N O T E : When tightening nuts, rap bracket
with hammer to drive taper of torque rod stud
into bracket. Tighten nut to torque listed in
‘•'Specifications” at end of this section.
6. Connect brake lines to each axle assembly;
then connect propeller shaft and check drive line
alignment as covered in “ P R O P E L L E R S H A F T S ”
(SEC. 4D).
7. Install front duals then remove supports
from under axle.
8. Lubricate shackle pin at lube fitting.
N O T E :
Care should be exercised to prevent
axles from rolling and causing injury or damage
to parts.
IN S T A L L A T IO N - RS-380 T Y P E
(Refer to Figure 10)
1. Raise frame to supply sufficient clearance
of suspension assembly under frame and cross­
members.
2. Roll assembly complete with wheels,
equalizer beams, cushion assembly, and hangers
under frame.
3. Lower frame taking care to align sus­
pension hanger bolt holes with bolt holes in frame.
Use drift through holes if necessary. Rest frame
on hangers.
4. Install the 28 side and lower hanger bolts,
lock washers, and nuts. Torque nuts to 9 0 - 1 1 0
FT LBS.
5. Install torque rods to axle brackets as
described under "Torque Rods” .
6. Connect brake lines to axles, and connect
propshaft to forward rear axle as described in
"Propeller Shafts” (SEC. 4D).
SPRING REPLACEMENT
(RT AND RU MODELS)
R E M O V A L
(R E F E R T O FIG. 8 A N D 9)
1. Remove duals from front and rear tandems
to facilitate removal of spring eye pin if pin must
be driven from bracket. Raise and support vehicle
frame to remove load from springs.
2. Remove rebound bolt from bottom of
spring rear bracket.
3. Remove lock bolt securing spring pin in
front bracket. Remove lubrication fitting from
inner end of pin, pin may be removed with slide
hammer. In some cases it may be necessary to
drive pin out with soft drift and hammer from
outer side.
4. On vehicles equipped with the " R T ” type
suspension shown in figure 8, remove four bolts
which attach spring saddle top pad to spring
saddle; hold nuts at bottom while turning bolt at
top. Loosen lock nuts on top pad set screw, then
loosen set screw and lift top pad and the slide
from top of spring. Lift spring assembly up and
rearward to remove from spring saddle.
5. On vehicles equipped with the " R U ” type
suspension shown in figure 9, remove bolts which
attach spring saddle cap to saddle; then lift spring
and saddle assembly up and rearward to remove.
It may be necessary to raise frame higher for
saddle to clear equalizer beam. Remove U-bolt
nuts which attach top pad to saddle, then remove
U-bolts, top pad, and saddle from spring.
IN SP E C T IO N O F SPRING
1. Thoroughly wash spring eye bushings and
bracket pins to remove all old lubricant. Make
sure lubricant passages in pins are open.
CHEVROLET SERIES 70-8CI H EAVY DUTY TRUCK SH O P M A N U A L