Pinion Installation

^ Tools Required:
- J 5590 Rear Pinion Bearing Cone Installer
- J 8614-01 Pinion
- D 128 Dial Indicator Set or Equivalent
- D 187-A Pinion Seal Installer
- C 4171 Handle
- C 4204 Rear Pinion Bearing Cup Installer

INSTALL OR CONNECT
1. Place the required amount of shims (and baffle if used) in the inner bearing bore.





2. Drive the inner bearing cup into the axle assembly using C 4171 and C 4204. The cup must be seated on the shims.





3. Inner bearing cone (and slinger if used) on pinion. Drive the bearing cone onto the pinion shaft using J 5590.
4. Outer bearing cone, slinger, and oil seal, using D 187-A pinion seal installer.
- Apply a light coat of axle lubricant to the pinion seal lip.
5. Preload shims onto pinion gear.
6. Pinion into the axle housing.
7. Pinion flange.
8. Washer and old nut.





- Tighten:
A. Nut to 637 Nm (470 ft. lbs.) while holding the pinion with J 8614-01.
B. 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.





C. 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 5.1 Nm (25 to 45 inch lbs.) on new bearings, or 1.0 to 1.4 Nm (8 to 12 inch lbs.) for used bearings.
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.