Bell Housing Bearing Preload

To establish correct bearing preload, a new crush sleeve must be used whenever disassembly of bell housing is necessary. A new flange nut should also be used to gain proper preload specification.

1. Install new crush sleeve. Lightly lubricate bearing and install shaft into housing. Lightly lubricate and install outer bearing onto shaft in housing. Position flange onto shaft and align shaft splines to flange.
2. Lightly tap bearing into position using flange. Install new outer seal using Special Tool # C-4698-2. Install washer and a new nut on shaft. Tighten flange nut using Special Tool # 6958 holder. Use a deep 1 1/8" socket. Tighten nut to 298 N.m (220 ft. lbs.) minimum. DO NOT overtighten. Maximum torque is 380 N.m (280 ft. lbs.).
   CAUTION: Never loosen flange nut to decrease shaft 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 have to be repeated.
   NOTE: A new collapsible spacer will start to crush at around 265 ft. lbs. If spacer requires more than 280 ft. lbs. torque to crush, collapsible spacer is defective.
3. Using yoke holder #6958, a short length of 1" pipe, and a torque wrench set at 380 N.m (280 ft.lbs.), crush collapsible spacer until bearing end play is taken up. Slowly tighten nut in 6.8 N.m (5 ft. lbs.) increments until rotating torque is achieved. Measure rotating torque frequently to avoid over-crushing collapsible spacer.
4. Check rotating torque with an INCH lb. torque wrench. Torque necessary to rotate shaft should be .56 N.m-1.65 N.m (5-15 INCH lbs.).