Spicer Single Drive Axles Service Manual: Single Reduction & Single Reduction with Differential Lock - Manual (Page 37)

34
Adjust Tooth Contact Pattern
Ser
vice Procedure
Adjust Pinion Position
If the gear pattern shows incorrect tooth depth contact,
change drive pinion position by altering the shim pack. Used
gears should achieve proper contact with the same shims
removed from the axle at disassembly.
Note: Check ring gear backlash after each shim change and
adjust if necessary to maintain the .006" to .018" specifi-
cations.
If the pattern is too close to the top land of the gear tooth,
remove pinion shims. Move pinion toward the ring gear.
If the pattern is too close to the root of the gear tooth, add
pinion shims. Move pinion away from the ring gear.
Adjust Ring Gear Position (Backlash)
If the gear pattern shows incorrect face width contact, change
backlash by adjusting the ring gear.
If the pattern is too close to the edge of the tooth toe, move
the ring gear away from the pinion to increase backlash.
1. Loosen the bearing adjuster on the teeth side of the
ring gear several notches.
2. Loosen the opposite adjuster one notch.
3. Return to adjuster on teeth side of ring gear and
tighten adjuster until it contacts the bearing cup.
4. Continue tightening the same adjuster 2 or 3 notches
and recheck backlash.
• If the pattern is concentrated at the heel (too far
up the tooth), move the ring gear toward the
pinion to decrease backlash.
5. Loosen the bearing adjuster on the teeth side of the
ring gear several notches.
6. Tighten the opposite adjuster one notch.
7. Return to adjuster on teeth side of ring gear and
tighten adjuster until it contacts the bearing cup.
8. Continue tightening the same adjuster 2 or 3 notches
and recheck backlash.