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3-10
REAR AXLE
ions without a bearing spacer require the depth of
mesh adjustment first, while drive pinions with a
separate bearing spacer require bearing pre-load ad-
justment first.
Diff eren tial Preload-Pin ion
with Bearing Spacer
(1) With the Tool installed in the carrier, remove
the main screw nut, centralizing washer, compression
sleeve and the front pinion bearing.
(2) Install the pinion bearing spacer, the larger
bore of the spacer next to the rear bearing.
(3) Position sleeve (SP-1730) in the front bearing,
make sure sleeve is flush with rear of bearing.
(4) Position the original shims, previously
re-
moved from the drive pinion shaft, over the sleeve
and slide the sleeve bearing and shims over the tool
main screw until the shims rest against the spacer
(Fig. 27).
(5) Install the tool compression sleeve (SP-535)
(square end out), centralizing washer (SP-534) and
main screw nut (SP-533). Turn the carrier in the stand
to bring the nut on top.
(6) Tighten the tool nut to 240 foot-pounds torque,
and using holding Tool C-3281 on the compression
sleeve, to hold the assembly in several positions, to
make a complete revolution while tightening. Remove
the holding tool and rotate the assembly several turns
in both directions to align the bearing rollers. Retest
torque to 240 foot-pounds (torque may have dimin-
ished as bearing rollers were aligned by rotating).
(7)
Using an inch pound torque wrench Tool C-685,
and with the handle of the wrench floating, read the
torque when the wrench is moving through at least
one full rotation. The correct reading is 20 to 30 inch-
pounds for a new bearing and zero to 15 inch-pounds
for the original bearing and reading should be uniform
during the full rotation. If the bearing preload is more
than 30 inch-pounds, a thicker shim should be used
under front bearing. If bearing preload is less than
20
inch-pounds, a thinner shim should be used. Shims
are available in thicknesses of .010, .012, .014, .016,
KPlJA
Fig. 26-Setting
Bearing Cups in Carrier Housing
SP-561
PINION LOCATING WASHER OR SHIM
62
x
246
Pinion Preload
18.25''
Ring Gead
A I
/ 11
".\PINION LOCATING WASHER OR
SHIM
ASSEMBLY
OF SP-526
l i '
/
$
Fig. 27-Pinion
Preload with Spacer
18.75"
Ring Gear)
After correct pinion bearing preload is established,
and .018 inch.
do
not
remove
the
tool.
Depth of Mesh
The position of the drive pinion with respect to the
Fig. 2 8 4 n s t a l l i n g Gauge Block on Tool
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