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DIFFERENTIAL
46-2 1
INSTALL PINION OIL SEAL W I T H
DIFFERENTIAL INSTALLED I N
CAR
REMOVAL
In case of pinion oil seal leak, remove old oil seal and
install new one (with differential remaining in car) as follows:
1. With rear wheels off floor, turn rear wheels and tap
brake backing plates with a soft hammer to ensure that brakes
are free.
2. Mark location of universl joint to pinion flange and
remove retaining bolts which hold rear universal joint to
pinion flange. Use a beavy rubber band or tape to hold
bearings onto journal to prevent loss of bearing rollers when
joint is disconnected if tie wire has been removed.
3. Scribe a line on end of pinion stem, extending down
along side of stem threads and onto pinion flange nut to
assure that parts are reassembled in the same relative
position.
4. Punch a small mark on the line at pinion stem end
and at top of lock nut, close to pinion stem threads.
5. Count the number of exposed threads from top of
pinion stem to lock nut. Remove lock nut with a heavy duty
socket, while holding pinion flange with Holder J 8614-10
(Fig. 4B-37).
6. Remove pinion flange.
When removing seal, use care to keep dirt and other
foreign matter out of exposed front pinion bearing.
7. Remove oil seal by prying it out of carrier with a
pointed tool, using care to keep tool away from the exposed
front bearing. Discard seal. Do not damage seal bore in
carrier.
REPLACE
1. Lubricate lip of new seal with clean gear lube. Install
seal by tapping into place, using J 22388 or J 22804-2 and
J 23911.
2. Before installing pinion flange, inspect for nicks,
scratches or burred surfaces that may damage the seal. If any
such damage is evident, hone carefully or install new flange.
a. If inspection shows the original pinion flange to be
satisfactory, replace by holding companion flange with J
86 14-10 and install nut to exactly the same position as before.
Make sure punched boles and scribe line are in alignment.
Tighten lock nut an additional 1/16" beyond this alignment.
If new pinion flange is required, see procedure for
adjusting pinion bearing pre-load.
D O NOT exceed the additional tightening of the nut by
a distance of more than 1/16" from its original position, as
tightening the nut in excess of this amount will disturb the
pinion and ring gear tooth contact pattern.
3. Align universal joint to pinion flange and tighten to
specified torque.
PINION FLANaGE
-
R & R ALL
SERIES
DIFFERENTIAL INSTALLED I N CAR
1. Raise car and remove both rear wheel and drums, then
disconnect propeller and support by wiring shaft to exhaust
pipe. Use a heavy rubber band or tape to hold bearings onto
journal to prevent loss of bearing rollers when joint is
disconnected if the wire has been removed.
2. Check pinion bearing pre-load with an inch pound
torque wrench and record reading and remove pinion flange.
3. Coat the pinion flange splines with silastic and install
pinion flange on pinion by tapping with a soft hammer until
a few pinion threads project through flange.
4. Install pinion flange washer and nut while holding
pinion flange with holder. Tighten the nut a little at a time
while intermittently rotating pinion to seat bearing. Check
pre-load until pre-load is 3-5 inch pound more than reading
obtained in Step 2.
5. Connect propeller shaft to pinion flange and tighten
to specified torque.
6. Install wheels and drums. Check and add lubricant
as necessary.
SPECIFICATIONS
DIFFERENTIAL SPECIFICATIONS
TIGHTENING SPECIFICATIONS
Use a reliable torque wrench to tighten the parts listed
to insure proper tightening without staining or distorting
parts. These specifications are to clean and lightly-lubricated
threads only; dry or dirty threads produce increased friction
which prevents accurate measurement of tightness.
TORQUE
.........................................
Ring Gear to Case Bolts
85 Ib. ft.
Side Bearing Cap Bolts
.........................................
55 lb. ft.
Differential Cover Bolts .......................................... 30 Ib. ft.
Pinion Shaft Lock Bolt or Screw
...........................
15 lb. ft.
Companion Flange Bolts or Nuts
..........................
15 lb. ft.
BEARING PRELOAD
Pinion Brgs.-Except "H" Series-New. 20-25 Ib. in. rotating
Ik-used
.................................................
10-15 lb. in. rotating
"H" Series Only-New
...........................
10-25 Ib. in rotating
Reused
....................................................
8-12 Ib. in rotating
Total Assembly-W/New Bearings
.......
35-40 Ib. in rotating
W/Reused Bearings
...........................
20-25 Ib. in rotating
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