Jeep CJ 1945-1970 Repair Information

Axle Shaft Bearing

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REMOVAL & INSTALLATION



Tapered Shafts

See Figure 1



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Fig. Fig. 1: Rear axle play is adjusted by adding or subtracting shims

An arbor press is necessary for this procedure.

  1. Remove the axle shaft as described earlier in this section.
  2.  
  3. With the aid of an arbor press, remove the bearing from the axle shaft.
  4.  
  5. The new bearing must be installed with the same press as used during removal, or bearing replacing tool J-2995.
  6.  
  7. If an inner seal in the axle housing was present during axle shaft removal, make sure to replace it with a new inner seal and pack the bearing with wheel bearing grease. When packing the bearing, make sure the grease fills the cavities between the bearing rollers.
  8.  

If there was no inner seal, do not install one. Do not pack the bearing with grease. The lack of an inner seal indicates that the bearing is lubed with axle lubricant.

  1. Measure axle shaft end-play as follows:
    1. Axle shaft end-play can be measured by installing the hub retaining nut on the shaft so that it can be pushed and pulled with relative ease.
    2.  
    3. Strike the end of each axle shaft with a lead hammer to seat the bearing cups against the support plate.
    4.  
    5. Mount a dial indicator on the left side support plate with the stylus resting on the end of the axle shaft.
    6.  
    7. Check the end-play while pushing and pulling on the axle shaft.
    8.  
    9. End-play should be within 0.004-0.008 in. (0.1016-0.2032mm), with 0.006 in. (0.1524mm) as the preferred value.
    10.  
    11. Add shims to increase end-play. Remove the hub retaining nut when finished checking end-play.
    12.  

  2.  

When a new axle shaft is installed, a new hub must also be installed. However, a new hub can be installed on an original axle shaft if the serrations on the shaft are not worn or damaged. The procedures for installing an original hub and a new hub are different.

  1. Install an original hub in the following manner:
    1. Align the keyway in the hub with the axle shaft key.
    2.  
    3. Slide the hub onto the axle shaft as far as possible.
    4.  
    5. Install the axle shaft nut and washer.
    6.  
    7. Install the drum, drum retaining screws, and wheel.
    8.  
    9. Lower the vehicle onto its wheels and tighten the axle shaft nut to 250 ft. lbs. (340 Nm). If the cotter pin hole is not aligned, tighten the nut to the next castellation and install the pin. Do not loosen the nut to align the cotter pin hole.
    10.  

  2.  
  3. Install a new hub in the following manner:
    1. Align the keyway in the hub with the axle shaft key.
    2.  
    3. Slide the hub onto the axle shaft as far as possible.
    4.  
    5. Install two well lubricated thrust washers and the axle shaft nut.
    6.  
    7. Install the brake drum, drum retaining screws, and wheel.
    8.  
    9. Lower the vehicle onto its wheels.
    10.  
    11. Tighten the axle shaft nut until the distance from the outer face of the hub to the outer end of the axle shaft is 1 5 / 16 in. (33.34mm). Pressing the hub onto the axle to the specified distance is necessary to form the hub serrations properly.
    12.  
    13. Remove the axle shaft nut and one thrust washer.
    14.  
    15. Install the axle shaft nut and tighten it to 250 ft. lbs. (340 Nm). If the cotter pin hole is not aligned, tighten the nut to the next castellation and install the pin. Do not loosen the nut to install the cotter pin.
    16.  

  4.  
  5. Connect the brake line to the wheel cylinder and bleed the brake hydraulic system and adjust the brake shoes.
  6.  

Flanged Shaft

An arbor press is necessary for this procedure.

  1. Remove the axle shaft as described earlier in this section.
  2.  
  3. Position the axle shaft in a vise.
  4.  
  5. Remove the retaining ring by drilling a 1 / 4 in. (6mm) hole about 3 / 4 of the way through the ring, then using a cold chisel over the hole, split the ring.
  6.  
  7. Remove the bearing with an arbor press, discard the seal and remove the retainer plate.
  8.  
  9. Installation is the reverse of removal. The new bearing must be pressed on. Make sure it is squarely seated.
  10.  

 
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