Spicer Drive Axles Service Manual Single Axles 2-Speed & Double Reduction - Manual (Page 29)

Adjust Ring Gear Tooth Contact
Adjust Pinion Position
If the contact pattern shows incorrect tooth depth contact, change drive pinion position by
altering the shim pack under the cage and cup assembly. Used gears should achieve proper
contact with the same shims removed from the axle at disassembly.
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If the pattern is too close to the root of the
gear tooth, add pinion shims.
If the pattern is too close to the top land of
the gear tooth, remove pinion shims
NOTE: Check ring gear backlash after each shim change and adjust if necessary to maintain
correct backlash (see backlash specs, page 27). Always recheck tooth contact pattern after
making shim pack changes.
Adjust Backlash
If the contact pattern shows incorrect face width contact, change backlash and recheck the
„
contact pattern.
With the pattern concentrated at the toe
(too far down the tooth), ADD BACKLASH
by loosening the bearing adjuster on the
teeth side of ring gear several notches.
Loosen the opposite adjuster one notch.
Return to adjuster on teeth side of ring gear
and tighten adjuster until it contacts the
bearing cup. Continue tightening the same
adjuster 2 or 3 notches. Recheck backlash.
If the pattern is concentrated at the heel (too
far up-the tooth), REMOVE BACKLASH
by loosening the bearing adjuster on the
teeth side of ring gear several notches.
Tighten the opposite adjuster one notch.
Return to adjuster on teeth side of ring gear
and tighten adjuster until it contacts the
bearing cup. Continue tightening the same
adjuster 2 or 3 notches. Recheck backlash.
29
ADJUSTMENT
Drive Axle
Overhaul
Section
3