Pinion Installation

^ Tools Required:
- J 22388 Pinion Oil Seal Installer
- J 22804-1 Pinion Oil Seal Spacer
- J 5590 Rear Pinion Bearing Cone Installer

INSTALL OR CONNECT

NOTICE: Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. The manufacturer will call out those fasteners that require a replacement after removal. The manufacturer will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and joint clamping force, and may damage the fastener. When you Install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.

^ The bearing cups should have been installed in PINION DEPTH ADJUSTMENT.

1. The pinion inner bearing to the pinion.





- Press the bearing onto the pinion until the bearing cone seats on the pinion shim(s).
2. A new collapsible spacer.
- Lubricate the pinion bearings with axle lubricant.
3. Pinion to the axle housing.
4. Outer pinion bearing onto the pinion using J 5590.
- Hold the pinion forward from inside the case while driving the bearing onto the pinion.





5. Pinion oil seal using J 22388.
6. The pinion flange to the pinion by tapping it with a soft-faced hammer until a few threads show through the pinion flange.





7. The pinion washer and nut while holding the pinion flange with J 8614-01.

- Tighten:
^ The nut until the pinion end play is just taken up. Rotate the pinion while tightening the nut to seat the bearings. Once there is no end play in the pinion, the preload torque should be rechecked.





^ Remove J 8614-01. Using an inch-pound torque wrench, check the pinion preload by rotating the pinion with the wrench. Preload should be at or below 2.3 to 2.8 Nm (20 to 25 inch lbs.) on new bearings, or 1.1 to 1.7 Nm (10 to 15 inch lbs.) for used bearings.
^ If the preload torque is below the preload values given above, continue tightening the nut in small increments. Check the preload after each tightening. Each tightening increases the bearing preload by several pounds. If the bearing preload is exceeded, the pinion will have to be removed and a new collapsible spacer installed.
^ Once the preload has been obtained, rotate the pinion several times to make sure the bearings are seated. Recheck the preload and adjust if necessary.
8. Differential case. Refer to BACKLASH ADJUSTMENT.