Buick LeSabre 1965 Service Manual page 457

7 - 3 0 SERVICE PROCEDURES
CHASSIS SUSPENSION
3. With housing still supported,
remove lower control arm rear
bracket bolt. If some difficulty is
encountered in removing bolt, re-
position jack farther f o r w a r d
under nose of carrier and slowly
raise to relieve pressure and bind
at control arm bushing. It may be
necessary to use suitable brass
drift to tap out bolt.
4. Remove lower control arm
front bracket nut and bolt. After
nut is removed it may be neces-
sary to tap out bolt with brass
drift. Remove lower control arm.
Installation - 49000
1. Before installing control arm,
check front edges of control arm
brackets and remove burrs as
necessary. Check all bolts, re-
place as necessary.
2. Position control arm in front
bracket and install bolt, lock
washer and nut. Do not tighten.
3. Slowly raise rear axle assem-
bly until control arm rear bushing
is aligned with bracket bolt hole.
It may be necessary to line up
bolt holes with a tapered punch
to permit installation of bolt, lock
washer and nut. Do not tighten.
4. Disconnect shock absorber at
lower end. Lower rear axle as-
sembly to allow positioning of
spring in its seat on the lower
control arm. Place a short piece
of 2 x 4 between the lower end of
the spring and axle housing. See
Figure 7-29. This assembly aid
holds the spring forward on the
lower control arm to facilitate
attachment of the spring to the
lower control arm.
5. Insert spring s e a t between
spring and control arm. Insert a
long tapered punch through the
control arm bolt hole from the
bottom to maintain alignment of
the control arm and spring seat
hole.
6. Slip spring clamp over punch
and position s t r a i g h t side of
clamp along s t r a i g h t end of
spring.
7. Spring should be at frame top
as follows:
Left - top spring end towards
rear of car
Right - top spring end towards
front of car
If springs are not positioned in
this manner loosen top spring
clamp bolts, reposition springs,
and retorque spring clamp bolts
to 17 ft. lbs. Hold spring in po-
sition, and with lower spring
clamp plate correctly positioned,
install bolt with nut on bottom
and torque to 25 ft. lbs.
8. Raise rear axle assembly to
reconnect shock a b s o r b e r at
lower bracket. Remove s h o r t
piece of 2 x 4 behind spring.
9. Tighten shock absorber bolt to
a minimum of 35 ft. lbs. and
tighten control arm bushing bolts
to 75 ft. lbs.
NOTE: Car should be in normal
load p o s i t i o n when tightening
shock absorbers and lower con-
trol arms. Thus where possible
car should be supported by wheel
noist, by axle contact hoist, or on
wheel stands. If this is impossible
due to equipment on hand, simu-
lating normal load height with
jack under rear axle housing
could be done.
10. Attach propeller shaft to rear
companion flange by a l i g n i n g
alignment marks made at disas-
sembly and then torquing (4) four
attaching bolts evenly to 85 ft.
lbs.
11. Reinstall brake line bracket
to rear suspension cross member.
12. Remove car stands and lower
car.
Installation - 45, 46, 48000
1. Position control arm in front
bracket and install bolt and nut.
Do not tighten.
2. Position chassis spring and in-
sulator in place and then raise
rear axle slowly with jack until
bushing in arm and h o l e s in
bracket align. Install nut and bolt.
3. Torque attaching nuts and bolts
to 75 ft. lbs.
4. Connect shock absorber and
torque to 45 ft. lbs.
5. Carefully attach the propeller
shaft to the rear companion flange
o b s e r v i n g the f o l l o w i n g
precautions:
a. Compress the bearing cups
using a 4" C-clamp to assure that
the snap rings do not gouge the
companion flange when seating.
See Figure 6-70.
b. Do not use the U-bolts to
draw the bearing cups into place.
U-bolts should be seated and the
nuts drawn up evenly.
c. Use Torque Wrench Adapter
J-9113 to torque U-bolts nuts to
15-18 ft.lbs.
6. Reinstall brake line bracket
to rear suspension cross member.
7. Remove car stands and lower
car.
b. Track Bar Service and
Replacement—49000
Removal
1. Raise car and support axle
housing so weight of car will be
on rear springs.
2. Remove pivot bolt and nut at-
taching track bar to bracket on
axle housing.
3. Remove pivot bolt and nut at-
taching track bar to track bar
bracket on left side of car.
4. Track bar can now be removed
from brackets.
5. If track bar bracket is to
be removed, remove three bolts,
washers, and nuts attaching track
bar bracket to frame side rails
and remove track bar bracket.
See Figures 7-32 and 33.