Jeep CJ 1945-1970 Repair Information

Steering Knuckle and Pivot Pins

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REMOVAL & INSTALLATION



4-Wheel Drive Models
  1. Raise and safely support the front end of the vehicle on jackstands, then remove the wheels.
  2.  
  3. Remove the front brake drum and brake shoes, as described in Brakes .
  4.  
  5. Remove the 8 screws that hold the oil seal retainer in place.
  6.  
  7. Remove the 4 screws which secure the lower pivot pin bearing cap.
  8.  
  9. Remove the 4 screws which hold the upper bearing cap in place. On CJ-2A models before serial No. 22972, the nuts also hold the steering arm in place.
  10.  
  11. Remove the bearing cap. On CJ-2A and 3A models, remove the brake hose shield.
  12.  
  13. The steering knuckle can now be removed from the axle.
  14.  

To install:
  1. Wash all of the parts in cleaning solvent.
  2.  
  3. Replace any worn or damaged parts. Inspect the bearings and races for scores, cracks, or chips. Should the bearing cups be damaged, they may be removed and installed with a driver.
  4.  
  5. Installation is the reverse the removal procedure. When reinstalling the steering knuckle sufficient shims must be installed under the top bearing cap to obtain the correct preload on the bearing. Shims are available in 0.003 in. (0.0762mm), 0.005 in. (0.127mm), 0.010 in. (0.254mm), and 0.030 in. (0.762mm). thicknesses. Install only one shim of the above thicknesses at the top only. Install the bearing caps, lockwashers, and screws, and tighten securely.
  6.  

You can check the preload on the bearings by hooking a spring scale in the hole in the knuckle arm for the tie rod sprocket. Take the scale reading when the knuckle has just started its sweep.

The pivot pin bearing preload should be 12-16 lbs. (26-35 kg) with the oil seal removed. Remove or add shims to obtain a preload within these limits. If all shims are removed and adequate preload is still not obtained, a washer may be used under the top bearing cap to increase preload. When a washer is used, shims may have to be reinstalled to obtain proper adjustment.

2-Wheel Drive Models
WITH SOLID I-BEAM FRONT AXLE
  1. Raise and safely support the front end on jackstands.
  2.  
  3. Remove the hub and dust caps.
  4.  
  5. Remove the cotter pin, wheel retaining nut and washer.
  6.  
  7. Pull the wheel out slightly to free the outer bearing, remove the bearing and remove the wheel and hub assembly.
  8.  
  9. Disconnect the brake line at the wheel cylinder and cap the end.
  10.  
  11. Remove the brake shoes and springs.
  12.  
  13. Remove the brake backing plate.
  14.  
  15. Remove the pivot pin lock.
  16.  
  17. Remove the top expansion plug and drive out the pin through the bottom with the lower plug.
  18.  

There is a shim between the upper face of the axle and the spindle. Do not lose it!

  1. Remove the thrust bearing and bushings.
  2.  

To install:
  1. If new bushings are being installed, they must be reamed for a running fit with the pivot pins. Be sure that the oil holes in the bushings are aligned with their lubrication fittings.
  2.  
  3. If the thrust bearing shows any signs of wear, replace it.
  4.  
  5. Install the pivot pin, aligning the notch with the pin hole.
  6.  
  7. When assembling the knuckle, check for play between the axle and inner face of the knuckle. If play seems excessive, use a different size shim. Shims were available in 0.011 in. (0.279mm), 0.033 in. (0.838mm) and 0.035 in. (0.889mm).
  8.  
  9. Install the top expansion plug and drive out the pin through the bottom with the lower plug.
  10.  
  11. Install the pivot pin lock.
  12.  
  13. Install the brake backing plate.
  14.  
  15. Install the brake shoes and springs.
  16.  
  17. Connect the brake line at the wheel cylinder.
  18.  
  19. Install the wheel and hub assembly.
  20.  
  21. Install the outer bearing.
  22.  
  23. Install the wheel retaining nut and washer.
  24.  
  25. While turning the wheel, tighten the nut until the wheel binds, then back off the nut 1 / 6 - 1 / 4 turn to free the bearing.
  26.  
  27. Install the cotter pin.
  28.  
  29. Install the hub and dust caps.
  30.  
  31. Bleed the brakes.
  32.  
  33. Lower the front end.
  34.  

WITH PLANAR FRONT SUSPENSION
  1. Raise and safely support the front end on jackstands.
  2.  
  3. Remove the hub and dust caps.
  4.  
  5. Remove the cotter pin, wheel retaining nut and washer.
  6.  
  7. Pull the wheel out slightly to free the outer bearing, remove the bearing and remove the wheel and hub assembly.
  8.  
  9. Disconnect the brake line at the wheel cylinder and cap the end.
  10.  
  11. Remove the brake shoes and springs.
  12.  
  13. Remove the brake backing plate.
  14.  
  15. Remove the pivot pin lock.
  16.  
  17. Use a sharp drift to remove the pivot pin lower expansion plug.
  18.  
  19. Drive the pivot pin upward until the needle bearing assembly can be removed.
  20.  
  21. Drive the pivot pin out through the bottom.
  22.  
  23. Remove the bushings from the lower part of the spindle.
  24.  
  25. If new bushings are being installed, they must be reamed for a running fit with the pivot pins. Be sure that the oil holes in the bushings are aligned with their lubrication fittings.
  26.  
  27. If the thrust bearing shows any signs of wear, replace it.
  28.  
  29. Drive the pivot pin in through the bottom.
  30.  
  31. Drive the pivot pin upward until the needle bearing assembly can be installed.
  32.  
  33. Install the pivot pin lower expansion plug.
  34.  
  35. Install the pivot pin lock.
  36.  
  37. Install the brake backing plate.
  38.  
  39. Install the brake shoes and springs.
  40.  
  41. Connect the brake line at the wheel cylinder.
  42.  
  43. Install the wheel and hub assembly.
  44.  
  45. Install the outer bearing.
  46.  
  47. Install the wheel retaining nut and washer.
  48.  
  49. While turning the wheel, tighten the nut until the wheel binds, then back off the nut 1 / 6 - 1 / 4 turn to free the bearing.
  50.  
  51. Install a new cotter pin.
  52.  
  53. Install the hub and dust caps.
  54.  
  55. Bleed the brakes.
  56.  
  57. Lower the front end.
  58.  

 
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