Drive Pinion Flange and Seal

Drive Pinion Flange and Seal

















Removal

NOTE: This operation disturbs the pinion bearing preload. Carefully reset the pinion bearing preload during assembly.

1. NOTE: The front wheels and tires and brake calipers must be removed to prevent drag during the pinion bearing preload recording and adjustment.

Remove the wheels and tires.

2. Remove the front driveshaft. For additional information, refer to Drive/Propeller Shafts, Bearings and Joints.

3. NOTICE: Do not allow the caliper and anchor plate assembly to hang from the brake hose or damage to the hose can occur.

Remove the 4 brake caliper anchor bolts and position the caliper and anchor plate assemblies aside.

- Support the caliper and anchor plate assembly using mechanic's wire.





4. Measure and record the pinion bearing preload.
- Using a Nm torque wrench, rotate the pinion gear. Measure the torque required to maintain pinion gear rotation.





5. Index-mark the pinion flange and the pinion gear stem.





6. Using the Drive Pinion Flange Holding Fixture to hold the pinion flange, remove and discard the pinion nut.





7. Using the 2 Jaw Puller, remove the pinion flange.





8. Inspect the pinion flange for burrs and damage. Inspect the end of the pinion flange that contacts the pinion bearing cone, pinion nut counterbore and drive pinion oil seal surface for nicks. Discard the pinion flange if damaged.

9. Use a screwdriver to force up the metal portion of the pinion seal. Using gripping pliers and a hammer, remove the drive pinion oil seal.





10. Remove the drive pinion oil slinger and the outer pinion bearing.





11. Remove and discard the collapsible spacer.

12. Verify the splines on the pinion stem are free of burrs. If burrs are evident, remove them with a fine crocus cloth.

13. Clean the drive pinion oil seal bore.

Installation

1. Install a new collapsible spacer.

2. Install the outer pinion bearing and the drive pinion oil slinger.





3. NOTE: Lubricate the drive pinion oil seal lips with axle lubricant.

Using the Drive Pinion Oil Seal Installer, install the drive pinion oil seal.





4. NOTICE: Never install the pinion flange with power tools or damage to the component may occur.

Align the index marks and using the Drive Pinion Flange Installer, install the pinion flange.





5. Install the new pinion nut. Only hand-tighten the pinion nut at this time.





6. NOTICE: Do not loosen the pinion nut to reduce pinion bearing preload. Install a new collapsible spacer and pinion nut if pinion bearing preload reduction is necessary or damage to the component may occur.

Using the Drive Pinion Flange Holding Fixture to hold the pinion flange, tighten the pinion nut to set the pinion bearing preload.

- Tighten the pinion nut, rotating the pinion occasionally to make sure the pinion bearings are seating correctly. Take frequent pinion bearing preload readings by rotating the pinion gear with a Nm torque wrench. The final reading must be 0.56 Nm (5 lb-in) more than the initial reading taken during removal.





7. Position the brake caliper and anchor plate assemblies, then install the 4 bolts.
- Tighten to 165 Nm (122 lb-ft).





8. Install the front driveshaft. For additional information, refer to Drive/Propeller Shafts, Bearings and Joints.

9. Install the wheels and tires. For additional information, refer to Wheels and Tires.