Spicer Tandem Drive Axles Pro-40 Single Reduction and Single Reduction with Differential Lock - Manual (Page 61)

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Forward Assembly
Due to the resiliency of the plastic driver, hammer rebound
may occur when the seal is seated. Keep clear of the ham-
mer rebound path!
6. Handle the seal by its outside diameter avoiding any
contact with the seal lips. During installation, use the
proper driver to make sure that the seal is mounted
properly.
7. Use a rubber mallet to drive the seal tool in until the
flange bottoms on the housing cover bore face. The
flange will locate the seal at the proper depth.
Guidelines for Reusing Yoke
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.
Do not use wear sleeves. Wear sleeves increase the yoke
hub surface diameter and cause premature seal wear and
repeat seal failure.
CAUTION CAUTION
CAUTION