GM Full-Size Trucks 1980-1987 Repair Guide

King Pins

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REPLACEMENT



K30 Series 4-Wheel Drive

See Figures 1, 2, 3, 4, 5, 6, 7 and 8

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Fig. Fig. 1: Remove the upper king pin cap nuts alternately



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Fig. Fig. 2: Removing the cap, spring and gasket



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Fig. Fig. 3: Removing the tapered bushing



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Fig. Fig. 4: Use large breaker bar to remove the upper king pin



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Fig. Fig. 5: Remove the cap, cone and seal. Do not reuse seal.



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Fig. Fig. 6: Installing the knuckle to the yoke



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Fig. Fig. 7: Wheel hub and rotor assemblies for K10/1500 and K20/2500 models



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Fig. Fig. 8: Wheel hub and rotor assemblies for K30/3500 models

  1. Remove the hub and spindle as previously outlined. Check the bronze spacer between the axle shaft joint assembly and bearing, if worn it must be replaced.
  2.  
  3. Remove the upper king pin cap nuts alternately, as the spring pressure will be forcing the cap up.
  4.  
  5. Remove the cap, compression spring, and gasket. Discard the gasket.
  6.  
  7. Remove the four cap screws from the lower king pin bearing cap. Remove the gearing cap and king pin.
  8.  
  9. Remove the upper king pin tapered bushing and knuckle from the yoke. Remove the felt seal and remove the knuckle.
  10.  
  11. Remove the upper king pin from the yoke with a large breaker bar.
  12.  
  13. Remove the lower king pin bearing cup, cone, grease retainer, and seal. Discard the seal. If the grease retainer is damaged, replace it.
  14.  

Install in the following manner:
  1. Install the new grease retainer and lower king pin bearing cup using special tool J-7817 or its equivalent.
  2.  
  3. Fill the grease retainer, grease the bearing and install. Install the lower seal using tool J22281 or its equivalent.
  4.  


WARNING
Do not distort the oil seal. It will protrude slightly from the surface of the yoke when installed.

  1. Install the upper king pin using tool J18871 or its equal. Torque to 500-600 ft. lbs.
  2.  
  3. Install the felt seal on the king pin.
  4.  
  5. Install the knuckle and tapered bushing over the king pin.
  6.  
  7. Install the lower bearing cap and king pin. Torque the cap screws to 90 ft. lbs.
  8.  
  9. Place the compression spring on the upper king pin bushing. Install the bearing cap with a new gasket. Torque the nuts to 90 ft. lbs.
  10.  

 
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