Buick LeSabre 1965 Service Manual page 412

6-46
PROPELLER SHAFT, 4 5 , 4 6
f
4 8
f
& 4 9 0 0 0 SERIES
bearing a s s e m b l i e s and snap
rings.
Front and rear propeller shafts
will not be available separately,
but only as a complete propeller
shaft assembly; this is because
the complete assembly must be
given a careful rotating balance
and this type of balancing equip-
ment is not available in the field.
If any part of the propeller shaft
requires repair, it is necessary
to remove the complete propeller
shaft assembly from the car. The
assembly must be handled very
carefully to avoid jamming or
bending any of the parts.
If the car is to be undercoated,
care must be taken to keep the
propeller shaft completely free of
undercoating material. Under-
coating or any o t h e r material
would upset the balance and might
cause a serious vibration.
The center ball stud and seat
should be lubricated every 6,000
miles with Multi-Purpose Grease
EP No. 1 Grade. Refer to para-
graph 1-3.
The s l i p spline should also be
lubricated w i t h Multi-Purpose
Grease EP No. 1 Grade every
12,000 miles, or after disconnect-
ing the slip joint for any reason.
To lubricate the spline, remove
the plug and install a grease fit-
ting. When grease appears at the
slip joint nut, remove the fitting
and reinstall the plug. The plug
must be in place as lubricant
would be thrown out through the
fitting by centrifugal force at high
speeds. Refer to paragraph 1-4.
6-22 DESCRIPTION OF
PROPELLER
SHAFT-49000
The propeller shaft used on 49000
Series utilizes a front universal
joint and two constant velocity
joints, one at the center of the
shaft and the other at the rear.
All components other than the
center bearing support and the
rear constant velocity joint are
similar in appearance and func-
tion to the 45, 46 and 48000 pro-
peller shaft. See Figure 6-90.
The center and rear constant
v e l o c i t y joint ball stud seats
should be lubricated every 6,000
miles with Multi-Purpose Grease
EP No. 1 Grade. The center slip
spline should also be lubricated
every 12,000 miles with Multi-
purpose Grease EP No. 1 Grade.
Removal, installation and over-
haul procedures are similar to
the 45, 46, 48000 propeller shafts
with the exception of the addi-
tional rear constant velocity joint
and the center bearing. The CV
joint assembly is disassembled
and reassembled in the s a m e
manner as the center constant
velocity joint.
6 - 2 3 PROPELLER SHAFT TROUBLE DIAGNOSIS
COMPLAINT
Shudder on acceleration, low
speed.
POSSIBLE CAUSE
Loose or missing bolts at cen-
ter bearing support to frame
cross member.
Improperly adjusted rear joint
angle.
Incorrectly set front joint
angle.
Incorrect plan view joint
angles.
Improper yoke phasing.
REMEDY
Tighten bolts.
Check and adjust using Kent-
Moore alignment gauge.
Shim under transmission sup-
port mount to decrease front
joint angle.
Use Kent-Moore alignment
gauge cable and weighted
strings from engine pulleys and
propeller shaft to align shaft
in plan view.
Check for correct yoke phasing
and correct if necessary. See
Figure 6-110.