Install pinion oil seal and yoke, Yoke reuse guidelines, Seal replacement – Spicer Single Drive Axles Service Manual: Single Reduction & Single Reduction with Differential Lock User Manual

Page 28

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"

Bearing

cage

Pinion

"A" - Sleeve must be sized to

press on seal outer flange.

CAUTION

Pinion

bearing

cage

Seal

Tool

CAUTION