Pinion Installation

INSTALL OR CONNECT

- Tools Required:
- J 5590 Rear Pinion Bearing Cone Installer
- J 23911 Pinion Oil Seal Installer
- J 8614-01 Pinion Flange Holder
- The bearing cups should have been installed in PINION DEPTH ADJUSTMENT.





1. The pinion inner bearing using J 5590.
- Drive the bearing on until the cone seats on the pinion shims.
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 23911.
6. The pinion flange 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:
A. 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 checked.





B. 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 2.7 to 3.6 Nm (24 to 32 inch lbs.) on new bearings, or 1.0 to 1.4 Nm (8 to 12 inch lbs.) for used bearings.
C. If the preload torque is below the specified values, 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.
D. Once the specified preload has been obtained, rotate the pinion several times to ensure the bearings have seated. Recheck the preload and adjust if necessary.
8. Differential case. Refer to BACKLASH ADJUSTMENT.