F 250 4WD Super Duty V10-6.8L VIN S (2001)
Pinion bearing preload adjustment
7. NOTE: Also refer to the illustration.
Adjust the pinion bearing preload by installing a new pinion bearing preload spacer.
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To increase the preload, install a thinner spacer. To decrease the preload, install a thicker spacer.
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The pinion bearing preload spacers are available in sizes from 7.26 to 8.00 mm (0.286 to 0.315 inch).
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Always measure the new spacer before installing it.
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On a flat surface, sand the next thicker size spacer with emery cloth to the required thickness to obtain a closer adjustment. Thoroughly wash
the spacer to remove the emery cuttings before installation.
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A 0.0254 mm (0.001 inch) change in the spacer thickness will change the torque rate approximately 3.3894 Nm (30 inch lbs.).
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Repeat Measuring pinion bearing preload torque and Pinion bearing preload adjustment in this procedure until the rotational torque is within
specifications.
Final assembly
8. Using a suitable torque multiplier, remove the hex nut.
9. CAUTION: Hammering on the pinion flange will close in the bearing bores and misalign the flange lugs. This will result in premature failure of
the journal needle bearings/other driveline components. Serious damage will also occur internally to the differential ring gear and pinion set/pinion
bearings by hammering on external parts. Remove and install the pinion flange using only the procedures.
Using the special tool, remove the pinion flange.
