Repair Pontiac Mid-size 1974-1983 Repair Guide

Wheel Bearings

Imprimir

Properly adjusted bearings have a slightly loose feeling. Wheel bearings must never be preloaded. Preloading will damage the bearings and eventually the spindles. If the bearings are too loose, they should be cleaned, inspected, and then adjusted.

Hold the tire at the top and bottom and move the wheel in and out of the spindle. If the movement is greater than 0.005 in., the bearings are too loose.

ADJUSTMENT





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Fig. Fig. 1 Front wheel bearing adjustment

  1. Raise and support the car by the lower control arm.
  2.  
  3. Remove the hub cap, then remove the dust cap from the hub.
  4.  
  5. Remove the cotter pin and spindle nut.
  6.  
  7. Spin the wheel forward by hand. Tighten the nut until snug to fully seat the bearings.
  8.  
  9. Back off the nut 1 / 4 - 1 / 2 turn until it is just loose, then tighten it finger-tight.
  10.  
  11. Loosen the nut until either hole in the spindle lines up with a slot in the nut and then insert the cotter pin. This may appear to be too loose, but it is the correct adjustment. The spindle nut should not be even finger-tight.
  12.  
  13. Proper adjustment creates 0.001-0.005 in. of end-play.
  14.  

REMOVAL, PACKING & INSTALLATION





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Fig. Fig. 2 Exploded view of the wheel bearings and related components



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Fig. Fig. 3 Pry the dust cap from the hub taking care not to distort or damage its flange



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Fig. Fig. 4 Once the bent ends are cut, grasp the cotter pin and pull or pry it free of the spindle



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Fig. Fig. 5 If difficulty is encountered, gently tap on the pliers with a hammer to help free the cotter pin



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Fig. Fig. 6 Loosen and remove the castellated nut from the spindle



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Fig. Fig. 7 Remove the washer from the spindle



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Fig. Fig. 8 With the nut and washer out of the way, the outer bearings may be removed from the hub



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Fig. Fig. 9 Pull the hub and inner bearing assembly from the spindle



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Fig. Fig. 10 Use a small prytool to remove the old inner bearing seal



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Fig. Fig. 11 With the seal removed, the inner bearing may be withdrawn from the hub



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Fig. Fig. 12 Thoroughly pack the bearing with fresh, high temperature wheel-bearing grease before installation



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