SERViCE MANUAL
Paragraph 15 (Cont.)
Using a bearing oven, heat inner bearing cone (7)
to a temperature of 250° F (120° C) and install on
bevel pinion shaft. Install outer bearing cup
(4)
in pin-
ion housing until seated. Install special tool CAS-1881
measuring ring on pinion shaft so dowels are away
from bearing. Install pinion shaft assembly into pin-
ion housing. Heat bearing cone (4) in a bearing oven
to a temperature of 250° F (120° C) and install on
pinion shaft until seated in bearing cup. Install and
tighten nut (2) on pinion shaft until a slight drag is
felt when rotating bevel drive pinion. Wrap a cord
around pinion shaft and attach a spring scale to end
of cord. Check rolling resistance of pinion shaft and
a(^just by progressively tightening the nut. Rolling re-
sistance must be 17.6-30.8 lbs. (8.0-14.0 kg) with new
bearings or 11.0-17.6 lbs. (5.0-8.0 kg) with used bear-
ings.
Remove the pinion shaft and remove the meas-
uring ring from pinion shaft. Using a micrometer,
measure distance (*'X'*—Fig. 26). Select a spacer ring
(5—Fig. 19) equal to the distance (**X"—Fig. 26).
Spacer rings are available in fifteen thicknesses from
0.433 to 0.488 inch (11.0 to 12.4 mm) in increments
of 0.0039 inch (0.1 mm). Install selected spacer ring
on bevel pinion shaft and install the assembly in pin-
ion housing. Heat outer bearing and install on pin-
ion shaft until seated in bearing
cup.
Install and tight-
en pinion shaft nut to a torque of 384 ft.-lbs. (520
N-m).
Again, check rolling resistance of the pinion
shaft. If rolling resistance is not correct, disassem-
ble and select a thicker spacer ring to increase or
thinner spacer ring to decrease rolling resistance.
Reinstall pinion shaft assembly.
Apply engineers blue to both sides of some of the
ring gear teeth. Install differential and right axle
housing. Install four cap screws
(22—Fig.
15)
at 90 de-
gree intervals and tighten them to a torque of 44-52
ft.-lbs.
(60-70
N-m).
Rotate pinion shaft several times,
then working through the drain plug opening, use a
dial indicator and check ring gear to pinion backlash
which should be 0.003-0.009 inch (0.07-0.22 mm). If
backlash is less than 0.003 inch (0.07 mm), remove
shims from right side and move them to left side. If
backlash is more than 0.009 inch (0.22 mm), remove
shims from left side and move them to right side. Un-
bolt and remove right axle housing and differential
assembly. Check the tooth contact pattern on ring
gear teeth and compare with patterns shown in Fig.
27.
Views '*A" and
**B"
shown correct tooth contact
patterns. Views
**C'*
and
'*D'*
show that pinion must
be moved inward. Views
**E**
and 'T'* show that pin-
ion must be moved outward. Readjust as necessary.
With ring gear and bevel drive pinion correctly ad-
justed, install differential assembly, lubricate and in-
stall
**0**
ring (24-Fig.
15)
and install right axle hous-
ing (23). Install and tighten cap screws (22) to a
torque of 44-52 ft.-lbs. (60-70 N-m).
Remove pinion nut (2—Fig. 19) and after applying
a light coat of sealant to outer surface of oil seal (3),
install oil seal with lip to inside. Install nut and tight-
en to a torque of 384 ft.-lbs. (520 N-m). Install new
lock plate (1) over nut, then using a hammer and
small punch, peen edge of plate into pinion shaft
splines.
Install new oil seals (7—Fig. 15) if necessary, then
reassemble and reinstall front drive axle by revers-
ing disassembly and removal procedures. Fill axle
housing to level plug opening with SAE 90 EP gear
oil.
Refill capacity is 4.75 U.S. quarts (4.5 L).
Fig. 25—Some of the measurements used in selecting
correct shim spacer to be instailed at "S'\
i
Fig. 24—Measure distance "B" between end of drive
pinion shaft bore to steel plate as shown.
Fig. 26—Cutaway view of measuring ring CAS-1881. Use
a micrometer to measure distance "X" from back of ring
to tip of dowel pin.
19
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