Pinion Seal

PINION SEAL

REMOVAL





1. With vehicle in neutral, position vehicle on hoist.
2. Mark a reference line across the axle flange (3) and propeller shaft flange (4).





3. Remove propeller shaft
4. Remove brake calipers and rotors to prevent any drag.
5. Rotate flange three or four times and verify flange rotates smoothly.
6. Measure torque to rotating pinion flange (1) with a inch pound torque wrench (2). Record reading for installation reference.
7. Hold pinion flange with Wrench C-3281 and remove pinion nut and washer.
8. Remove flange with two jaw puller.
9. Remove pinion seal with a seal puller or slide-hammer mounted screw.

INSTALLATION





1. Apply a light coating of gear lubricant on the lip of pinion seal.
2. Install new pinion seal with Installer C-3972A (1) and Handle C-4171 (2).
3. Install flange on the end of the shaft with the reference marks aligned.
4. Install flange on pinion shaft with Installer C-3718 and Wrench C-3281.
5. Install pinion washer and a new pinion nut. The convex side of the washer must face outward.

CAUTION: Do not exceed the minimum tightening torque when installing the companion flange retaining nut at this point. Failure to follow these instructions can damage the collapsible spacer or bearings.

6. Hold flange with Wrench C-3281and tighten pinion nut to 285 Nm (210 ft. lbs.). Rotate pinion several revolutions to ensure bearing rollers are seated.





7. Rotate pinion flange (1) with an inch pound torque wrench (2). Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.).

CAUTION: Never loosen pinion nut to decrease pinion bearing rotating torque and never exceed specified preload torque. If rotating torque is exceeded, a new collapsible spacer must be installed. Failure to follow these instructions can damage the collapsible spacer or bearings.

8. If rotating torque is low use Wrench C-3281, to hold flange and tighten pinion nut in 6.8 Nm (5 ft. lbs.) increments until proper rotating torque is achieved.

NOTE: The seal replacement is unacceptable if final pinion nut torque is less than 285 Nm (210 ft. lbs.).

NOTE: The bearing rotating torque should be constant during a complete revolution of the pinion. If the rotating torque varies, this indicates a binding condition.

9. Install propeller shaft.
10. Install rear brake components.