Tightening Pinion Nut; Check Pinion Gear Rotation Torque—Typical - Jeep 200 Cherokee Service Manual

XJ
REMOVAL AND INSTALLATION (Continued)
Fig. 19 Pinion Yoke Installation
1 – PINION YOKE
2 – AXLE HOUSING
NOTE: If new pinion bearings were installed, do not
install the differential assembly and axle shafts until
after the pinion bearing preload and rotating torque
are set.
(7) Install the pinion washer and a new nut on the
pinion gear. Tighten the nut to 217 N·m (160 ft. lbs.)
minimum. Do not over-tighten. Maximum torque is
353 N·m (260 ft. lbs.).
CAUTION: Never loosen
decrease pinion gear 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.
(8) Using yoke holder 6958 and a torque wrench
set at 353 N·m (260 ft. lbs.), crush collapsible spacer
until bearing end play is taken up (Fig. 20). If more
than 353 N·m (260 ft. lbs.) is needed to begin to col-
lapse the spacer, the spacer is defective and must be
replaced.
(9) Slowly tighten the nut in 6.8 N·m (5 ft. lbs.)
increments until the rotating torque is achieved.
Measure the rotating torque frequently to avoid over
crushing the collapsible spacer (Fig. 21).
(10) Check rotating torque with an inch pound
torque wrench (Fig. 21). The torque necessary to
rotate the pinion gear should be:
• Original Bearings — The reading recorded dur-
ing removal, plus an additional 0.56 N·m (5 in. lbs.).
• New Bearings — 1.5 to 4 N·m (15 to 35 in. lbs.).
(11) Install differential assembly and axle shafts, if
necessary.
(12) Align marks made previously on yoke and
propeller shaft and install propeller shaft.
pinion gear nut to
TUBE, 181, AND 186 FBI AXLE
Fig. 20 Tightening Pinion Nut
1 – PINION FLANGE
2 – FRONT AXLE
3 – TOOL 6958
Fig. 21 Check Pinion Gear Rotation Torque—Typical
1 – PINION YOKE
2 – INCH POUND TORQUE WRENCH
(13) Install brake rotors and calipers. Refer to
Group 5, Brakes, for proper procedures.
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