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REAR AXLE
3-11
drive gear (depth
of
mesh) is determined by the lo-
cation of the bearing cup shoulders in the carrier and
by the portion of the pinion back of the rear bearing.
The thickness of a pinion spacer washer suitable for
the carrier can be determined by using Tool C-758.
(1) Reverse the carrier in the stand and install
gauge block SP-528 on the end of the tool, (Fig. 28),
securing it to the tool with the Allen screw. The flat
portion of the spacer should be facing the differen-
tial bearing pedestals and the offset of the spacer (or
the large portion) toward the center of the carrier.
Tighten the screw with an Allen wrench.
(2) Position the arbor SP-561 (part of Tool C-758)
in the differential bearing pedestals of carrier (Fig.
29). Center the arbor so that an approximate equal
distance is maintained at both ends. Position the dif-
ferential bearing caps and attaching bolts on the car-
rier pedestals. Between the arbor and each cap insert
a piece of .002 inch feeler stock and tighten cap bolts
securely.
(3) Select a washer that will
fit between the tool
gauge block and arbor (Fig. 30). This fit must be snug
but not too tight (similar to the pull of a feeler gauge).
This washer is then used in determining the correct
thickness washer for installation.
(4) To select a washer for installation, read the
marking on the end of the pinion (-0,
-1, -2,
+1,
+2, etc.). When the marking is
-
add that amount to
the thickness of the washer selected in Step 3.
Ex-
ample: With a washer .086 inch thick and a pinion
marked -2,
install a washer .088 inch thick (.086
+
.002
=
,088 inch). Example: With a washer .086
inch thick and a pinion marked +2, install a washer
.084 inch thick, (.086
-
.002
=
.084 inch) or when a
washer, .086 inch thick is too loose and .088 inch too
tight,
use
.086 inch.
Fig.
2 9 - - l n r t a / h g
Arbor
in Carrier
Fig.
30-Determining
Spacer Thickness
(5) Remove the tool arbor from the carrier.
(6) Remove the tool and bearings from the carrier.
(7) Remove the shims, spacer, tool sleeve, and rear
bearing cone from the tool main screw.
(8) With the shaft end of pinion facing up, install
the correct pinion spacer washer on the pinion gear
shaft. These washers have a chamfer on one side.
NOTE:
The chamfer must face the pinion head.
(9) Position the rear bearing cone on the pinion
shaft (small side away from pinion head). Make cer-
tain that the contacting surfaces of the correct wash-
er, pinion head, and rear bearing cone are perfectly
clean and free of any foreign particles.
(10) Install the rear bearing cone onto the pinion
shaft with Tool DD-996. An arbor press may be used
in conjunction with the tool.
(11) Install the bearing tabular spacer on the pin-
ion shaft (large bore facing rear bearing).
(12) Install the selected shim pack.
(13) Lubricate the front and rear pinion shaft bear-
ing cones with Multipurpose Gear Lubricant.
(14) Install the front bearing in its cup in the car-
rier.
(15) Install the oil seal in the carrier with driver
Tool C-3656 (lip of seal must face front bearing). The
seal
must
be driven into the carrier until tool bot-
toms, (Fig. 31).
(16) Insert the pinion shaft up through the carrier.
While supporting the pinion in the carrier, install the
companion flange with installing Tool C-496 or DD-
999.
(17) Remove the tool and install the plaih washer
(convex side
of
washer up) and nut.
(18)
Hold the companion flange with holding Tool
C-3281. Tighten the companion flange nut to 240 foot-
pounds torque. Rotate the assembly several turns in
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