Specifications

43
Assembly and Installation
MAINTENANCE MANUAL
The preload of the bearings on the drive pin-
ion is controlled by a spacer between the outer
bearing cone and the helical driven gear.
Adjustthepreloadbychangingthesizeofthe
spacer.
• Todecreasethepreload,useathickerspacer.
• Toincreasethepreload,useathinnerspacer.
• If the depth of the drive pinion is changed,
the thickness of the spacer must also be
changed the same amount. See the following
examples.
• Ifa0.003inch(0.076mm)shimisADDEDto
the shim pack to INCREASE the depth of the
drive pinion, a 0.003-inch (0.076 mm) larger
spacer must be installed to keep the preload
on the bearings.
• If a 0.003-inch (0.076-mm) shim is RE-
MOVED from the shim pack to DECREASE
the depth of the drive pinion, a 0.003-inch
(0.076 mm) smaller spacer must be installed
to keep the preload on the bearings.
NOTE:
The helical driven gear and the spacers are
installed when the bearing preload on the
drive pinion is inspected and adjusted.
1. If you are installing a new ring gear and drive
pinion, the correct thickness of the shim pack
between the pinion inner bearing cap and the
differential must be determined. See the proce-
dure in this section before temporarily assem-
bling and installing the drive pinion assembly.
• Ifyouareinstallingtheoriginalringgearand
drive pinion, temporarily install the drive pin-
ion assembly.
2. If removed, use a press and a sleeve to in-
stall the inner bearing cone onto the drive
pinion. Place the sleeve on the inner race of
the bearing. Apply pressure until the bottom
of the cone touches the shoulder on the pin-
ion. Figure 5.5.
3. Apply axle lubricant to the bearing caps and
cones.
4. If removed, install the shim pack and the in-
ner bearing cap of the drive pinion.
A. Place the differential case into a press so
that the bearings caps are toward the TOP
of the press.
B. Install the correct amount of shims into the
bore for the inner bearing cap of the drive
pinion. Figure 5.6.
C. Place the cap into the bore. Figure 5.6.
D. Place supports under the differential case
so that the case is level.
E. Place a sleeve or a installation tool into the
caps and press the caps into the bore until
the bottom of the cap touches the shims.
If a press is not available, use a sleeve, a
brass drift or a installation tool and a ham-
mer to install the cap. Figure 5.7.
Figure 5.5
Figure 5.6
SHIMS
Bearing caps
PRESS AND
SLEEVE