Spicer Tandem Drive Axles Service Manual D170, D190, and D590 Series - Manual (Page 55)

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Wheel Differential
Install Wheel Differential Assembly - Forward Carrier Assembly
Backlash and Bearing Preload
1. Turn the flange half bearing adjuster in until the ring
gear contacts the pinion (zero backlash) then back
the adjuster out two notches of the adjuster lugs.
3. Tighten the plain half adjuster two lug notches.
Start with the notch at the top, count two notches
counterclockwise on the adjuster so that the
notch is facing straight up. You now have a
two notch preload.
4. Use a rubber mallet to make certain that both
bearing adjusters are fully seated.
5. With a dial indicator, check the ring and pinion
backlash. Set the backlash from 0.010" to 0.012".
This will give you room to adjust the contact pattern,
if necessary.
2. Tighten the plain half adjuster until the bearing cup
just starts to turn. This is a zero bearing preload.
1 - Flange Half
2 - Plain Half
1
2
1
2
1 - Flange Half
2 - Plain Half
Wheel Differential