Pinion Assembly

Part 1 Of 2:

Part 2 Of 2:

- Tools Required:
- J 24433 Rear Pinion Bearing Cone Installer
- J 8092 Driver Handle
- J 8608 Outer Pinion Bearing Cup Installer
- J 8614-01 Pinion Flange Holder

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.

- Lubricate all parts with axle lubricant.

1. Pinion rear bearing onto the pinion.





- Press the bearing onto the pinion using J 24433.
2. Outer pinion bearing cup using J 8608 and J 8092.
3. Inner pinion bearing cup using J 24433 and J 8092.
4. A new collapsible spacer to the pinion.
5. Pinion into the cage.
6. Pinion outer bearing onto the pinion.
- Press the bearing onto the pinion.
7. Pinion oil seal using J 24433 and J 8092.
8. Pinion flange to the pinion splines.
9. Washer and pinion nut
A. Place the pinion cage assembly into the vise.
B. Flange holder J 8614-01to the pinion flange.





- Tighten the nut until the pinion end play is taken up. Rotate the pinion while tightening in order to seat the bearings. Once there is no end play in the pinion, the preload torque should be checked.
- 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 2.8 to 4.0 Nm (25 to 35 inch lbs.) for new bearings, or 0.56 to 1.7 Nm (5-15 inch lbs.) for used bearings.
- If the preload torque is below the values given above, continue torquing 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 ensure that the bearings have seated. Recheck the preload and adjust if necessary.
10. Pinion cage to the axle housing. Refer to PINION INSTALLATION.

NOTICE: Proper pinion depth setting is a two step procedure.
1. Setup dimension arrived at with the indicator to be considered a starting point.
2. Gear tooth pattern check is necessary to "fine tune" the pinion depth and may indicate additional shim changes to the pinion stem. Both procedures must be performed to ensure proper axle performance and prevent system damage.