Jeep CJ 1945-1970 Repair Information

Axle Shaft, Bearing and Seal

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REMOVAL & INSTALLATION



See Figures 1 through 14



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Fig. Fig. 1: Cross-sectional views of Bendix type joint (top) and Rzeppa type joint (bottom) front axle shafts



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Fig. Fig. 2: Another way to remove the axle is to first loosen the brake hose cover bolt ...



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Fig. Fig. 3: ... then remove the brake hose cover from the knuckle assembly



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Fig. Fig. 4: Remove the upper pivot pin ...



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Fig. Fig. 5: ... loosen the lower pivot pin retaining plate bolts ...



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Fig. Fig. 6: ... then remove the lower pivot pin from the knuckle



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Fig. Fig. 7: Remove the knuckle seal plate retaining bolts



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Fig. Fig. 8: Remove the brake drum and brake components, if not already done



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Fig. Fig. 9: Remove the spindle from the axle assembly ...



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Fig. Fig. 10: ... then remove the pivot pin bearings from the joint



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Fig. Fig. 11: Remove the knuckle's rubber seal ...



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Fig. Fig. 12: ... and also remove the larger gasket from the seal plates



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Fig. Fig. 13: If necessary, remove the seal plates from the axle housing



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Fig. Fig. 14: Slide the axle shaft out of the axle housing

The front axle shaft and universal joint assembly is removed as an assembly.

Refer to the U-joint portion of this section for a description of the three types used on these axles.

  1. Remove the wheel.
  2.  
  3. Remove the hub with a puller. If there are locking hubs, remove them as described in General Information & Maintenance .
  4.  
  5. Remove the axle shaft driving flange bolts.
  6.  
  7. Apply the foot brakes and remove the axle shaft flange with a puller.
  8.  
  9. Release the locking lip on the lockwasher and remove the outer nut, lockwasher, adjusting nut, and bearing lockwasher.
  10.  
  11. Remove the wheel hub and drum assembly with the bearings. Be careful not to damage the oil seal.
  12.  
  13. Remove the hydraulic brake tube and the brake backing plate screws.
  14.  
  15. Remove the spindle.
  16.  
  17. Remove axle shaft and universal joint assembly.
  18.  

To install:
  1. Single cross Cardan type installation is the reverse of the removal procedure.
  2.  
  3. Bendix type installation is as follows:
    1. Insert the U-joint and shaft assembly into the housing. Mesh the splined end of the shaft with the differential and push it into place.
    2.  
    3. Install the wheel bearing spindle.
    4.  
    5. Install the brake tube and backing plate.
    6.  
    7. Grease and assemble the wheel bearings, hub and drum on the spindle. Install the bearing washer and adjusting nut. Tighten the nut until a slight drag is felt, then back it off 1 / 6 turn (one flat of the nut). Install remaining parts.
    8.  

  4.  
  5. Early Rzeppa type requires a shimming procedure. Installation is the same as the Bendix type except that a shim pack must be installed between the driving flange and the wheel hub to determine the proper operating clearance for the U-joint. To do this:
    1. Install the drive flange on the axle splines without shims.
    2.  
    3. Install the axle nut and tighten it snugly.
    4.  
    5. Install two opposite flange bolts snugly.
    6.  
    7. Use a feeler gauge to measure the gap between the outer end of the hub and the inner face of the driving flange. This determines the amount of shimming to be used. It is necessary to install shims of a thickness equal to the measured gap plug 0.015-0.050 in. (0.381-1.27mm). If no gap is found, install a 0.010 in. (0.254mm) shim.
    8.  
    9. Install the correct amount of shims, replace the flange and install the 6 bolts. Install the axle shaft nut and make sure that the proper end-float has been obtained. To do this, back off the shaft nut so that a 0.050 in. (1.27mm) feeler gauge will fit between the nut and driving flange. Tap the end of the shaft with a soft mallet which will force in the shaft the amount of end-float. Measure the clearance between the nut and driving flange. Clearance should be 0.015-0.050 in. (0.381-1.27mm).
    10.  

  6.  
  7. Late Rzeppa type installation is the same as the Bendix type except that a snapring is used to secure the outer end of the shaft controlling the end-float.
  8.  

 
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