181 FBI AXLE
TJ
3 - 37
REMOVAL AND INSTALLATION (Continued) (5) Install the rear pinion bearing and the pinion depth shim/oil slinger onto the pinion with Installer W-262 and a shop press (Fig. 44).
Fig. 45 Collapsible Preload Spacer Fig. 44 Rear Pinion Bearing Installation 1 2 3 4 5
– – – – –
PRESS INSTALLATION TOOL PINION DEPTH SHIM/OIL BAFFLE DRIVE PINION DRIVE PINION SHAFT REAR BEARING
1 2 3 4 5
– – – – –
COLLAPSIBLE SPACER SHOULDER PINION GEAR OIL SLINGER REAR BEARING
(6) Install a new collapsible preload spacer on pinion shaft and install pinion in housing (Fig. 45). (7) Install yoke with Installer W-162-B, Cup 8109, and Holder 6958 (Fig. 46). (8) Install the pinion washer and a new nut onto the pinion. Tighten the nut to 216 N·m (160 ft. lbs.) minimum. Do not over–tighten. Maximum torque is 352 N·m (260 ft. lbs.). CAUTION: Never loosen pinion nut to decrease pinion bearing rotating torque and never exceed specified preload torque. If preload torque is exceeded a new collapsible spacer must be installed. The torque sequence will then have to be repeated. (9) Using Holder 6958 and torque wrench (set at 352 N·m (260 ft. lbs.)), crush collapsible spacer until bearing end play is taken up (Fig. 47). If more than 353 Nzm (260 ft. lbs.) is needed to begin to collapse the spacer, the spacer is defective and must be replaced. (10) Slowly tighten the nut in 6.8 N·m (5 ft. lb.) increments until the rotating torque is achieved. Measure the rotating torque frequently to avoid over crushing the collapsible spacer (Fig. 48).
Fig. 46 Pinion Yoke Installation 1 – PINION YOKE 2 – AXLE HOUSING
(11) Check bearing rotating torque with an inch pound torque wrench (Fig. 48). The torque necessary to rotate the pinion should be: • Original Bearings — 1 to 2 N·m (10 to 20 in. lbs.). • New Bearings — 1.5 to 4 N·m (15 to 35 in. lbs.). (12) Install differential assembly.