Cadillac 60 Series 1963 Shop Manual page 155

7-6
PROPELLER SHAFT A N D REAR AXLE
b. Installation
1. Position oil seal in carrier. Place Pinion
Oil Seal Installer, J-21113, against seal and se-
cure tool and seal with pinion nut and washer.
2. Install Pinion Nut Socket, J-2571-1, on pin-
ion nut and press oil seal into carrier by tighten-
ing pinion nut with socket wrench, Fig. 7-5, until
Installer Tool bottoms on face of carrier.
3. Remove Pinion Nut Socket, pinion nut and
washer, and Oil Seal Installer.
CAUTION: Make certain that seal surface of
yoke is free from scratches or nicks. If
necessary, clean with No. 400 grit "wet" paper
and kerosene. Use only a circular motion when
sanding seal surface of yoke so as not to leave
any spiraled marks on seal surface.
4. Install yoke on pinion shaft splines with
punch marks lined up.
5. Install washer and new pinion nut on pinion
shaft.
6. Install Pinion Yoke Holding Tool, J-6544, on
yoke and install two attaching nuts.
7. Install Socket, J-2571-1, on pinion nut
through hole in Holding Tool and tighten nut, using
3/4 inch drive socket wrench, until proper pre-
load of bearing is attained.
NOTE: Proper pre-load of bearing is at-
tained when torque required to rotate pinion
shaft is from 2 to 5 inch-pounds greater than
the torque recorded in Step 3 of the removal
procedure. It will be necessary to remove
Holding Tool and drive socket wrench in order
to install 0-100 inch-pound torque wrench and
Adapter, J-2571-2, to check torque required to
rotate pinion shaft, Fig. 7-7.
If torque is low, tighten pinion nut slightly and
again measure inch-pounds torque required to ro-
tate pinion shaft. Repeat this operation, tightening
the nut slightly each time, until specified torque
is obtained. It will require approximately 200
foot-pounds torque on pinion nut to obtain proper
bearing pre-load.
CAUTION: Do not overtighten, and never
back off on the nut to reduce pre-load torque.
The average torque on an assembly with over
1,000 miles is between 15 and 20 inch-pounds.
The torque on a new assembly is approximately
50 inch-pounds.
8. Stake pinion shaft into nut.
9. Connect rear universal joint to pinion yoke.
Install " U " bolts, locks, and nuts, tightening nuts
to 15 foot-pounds.
10. Refill rear axle to correct level as de-
scribed in Section 2, Note 4. Use only special
lubricant available from factory Parts Ware-
houses for cars equipped with a Controlled Dif-
ferential.
11. Reinstall brake drums and rear wheels, and
lower car.
4. Rear Axle Backlash Measurement
1. Place car on hoist.
2. To prevent rotation of pinion flange or yoke,
use corresponding holding tool, and clamp tool
handle to lower control link.
3. Pull parking brake cable on one wheel to
prevent wheel from turning. (This is not neces-
sary on cars equipped with a Controlled Differ-
ential.)
4. Measure rotation (backlash) of opposite
wheel in inches at outer circumference of tire
tread. A stiff wire pointer fastened to the fender
or car frame will aid in this measurement. Maxi-
mum backlash under this condition should not ex-
ceed 1/2 inch on standard differentials and 1/8
inch on Controlled Differentials.
5. Rear Wheel and Brake Drum
Removal and Installation
a. Removal
1. Raise rear end of car, place jack stands
under rear frame rails, and remove wheel.
2. Remove two screws holding brake drum to
axle shaft flange. (For commercial chassis, see
Note 7a.)
3. Remove brake drum.
b. Installation
1. Install brake drum on rear axle shaft flange
and secure with two screws.
2. Install wheel and replace wheel mounting
nuts, tightening to 105 foot-pounds. (For com-
mercial chassis see Note 7b.)
3. Remove jack stands and lower car.
6. Axle Shaft, Bearing Oil Seal, and
Wheel Bearing Removal and
Installation (Fig. 7-9) (Except
Commercial Chassis)
a. Removal of Axle Shaft and Bearing Assembly
1. Raise rear end of car and remove wheel and
brake drum as described in Note 5a.