Spicer Single Drive Axles Service Manual: Single Reduction & Single Reduction with Differential Lock - Manual (Page 28)

25
Seals / Yokes
Install Pinion Oil Seal and Yoke
1. With pinion bearing preload adjustment complete,
install oil seal. If available, use a properly sized
installation tool to install the oil seal. Otherwise, use
a press and properly sized sleeve to prevent distor-
tion or contact with seal lips during installation (see
illustration).
2. Make sure yoke is clean and dry. Install yoke and nut
(or nut washer on some models). Tighten nut to cor-
rect torque (see torque chart).
Note: After tightening nut, recheck pinion bearing rolling
torque, then proceed with pinion installation in carrier.
Yoke Reuse Guidelines
Do not use the yoke if it has any damage on the seal surface
(nicks or scratches).
The surface of the yoke and the lips of the seal form a critical
interface which retains the axle’s lubricant while sealing the
axle from outside contaminants. The condition of the yoke
hub’s surface is a very important factor in determining seal
life.
Carefully inspect the seal surface area of the yoke hub for
signs of wear and damage. Do not reuse the yoke if there is
noticeable wear such as heavy grooving, beyond normal pol-
ishing from the seal lips.
Note: Do not rework the yoke with abrasives such as emery
paper or crocus cloth. Clean the surface of the yoke as
necessary using chemical cleaners. Remove all trace of
the chemicals from the yoke after cleaning.
Note: Do not use wear sleeves. Wear sleeves increase the
yoke hub surface diameter and cause premature seal
wear and repeat seal failure.
Seal Replacement
Note: Spicer strongly recommends using seal drivers when
installing new seals. Use the proper driver to ensure the
seal is square and installed to the proper depth.
Oil seals can be easily damaged prior to installation. Use
care when handling the new seal to prevent damage or con-
tamination. Leave the seal in its package until installation.
On new yokes, leave the protector on the yoke until it is
installed on the shaft to prevent damage or contamination.
Press
Sleeve
"A" "A"
Bearing
cage
Pinion
Pinion
"A" - Sleeve must be sized to
press on seal outer flange.
CAUTION
Pinion
bearing
cage
Seal
Tool
CAUTION