Pinion Installation

TOOLS REQUIRED
^ J-5590 Inner Pinion Bearing Cone Installer
^ J-39829 Pinion Oil Seal Installer
^ J-8614-01 Pinion Flange Remover
^ Or Equivalent





1. The pinion inner bearing (34) using J-5590. Drive the bearing until the bearing cone seats on the pinion shims.
2. A new collapsible spacer (30). Lubricate the pinion bearings with axle lubricant.
3. Pinion (27) to the axle housing.
4. Outer pinion bearing (35) onto the pinion. Hold the pinion forward from inside the case while driving the bearing onto the pinion.
5. Oil seal slinger (32).
6. Pinion oil seal (33) using J-39829.
7. The pinion flange (40) to the pinion by tapping it with a rawhide hammer until a few threads show through the pinion flange.
8. The pinion washer (29) and a new nut (28) while holding the pinion flange with J-8614-01
a. 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 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 2.3 to 4.5 Nm (20 to 40 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 preloads 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.
d. Once a preload of 2.3 to 4.5 Nm (20 to 40 inch lbs.) has been obtained, rotate the pinion several times to assure that the bearings have seated. Recheck the preload, and adjust if necessary.