GM Corvette 1963-1982 Repair Guide

Wheel Hub

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REMOVAL & INSTALLATION



See Figures 1 through 15

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Fig. Fig. 1: Exploded view of the front wheel hub and bearing assemblies



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Fig. Fig. 2: Pry the dust cap from the hub taking care not to distort or damage its flange



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Fig. Fig. 3: 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. 4: If difficulty is encountered, gently tap on the pliers with a hammer to help free the cotter pin



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Fig. Fig. 5: Loosen and remove the castellated nut from the spindle



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Fig. Fig. 6: Remove the washer from the spindle



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Fig. Fig. 7: With the nut and washer out of the way, the outer bearings may be removed from the hub



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Fig. Fig. 8: Pull the hub and inner bearing assembly from the spindle



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Fig. Fig. 9: Use a small prytool to remove the old inner bearing seal



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Fig. Fig. 10: With the seal removed, the inner bearing may be withdrawn from the hub



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Fig. Fig. 11: Thoroughly pack the bearing with fresh, high temperature wheel-bearing grease before installation



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Fig. Fig. 12: Apply a thin coat of fresh grease to the new inner bearing seal lip



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Fig. Fig. 13: Use a suitably sized driver to install the inner bearing seal to the hub



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Fig. Fig. 14: With new or freshly packed bearings, tighten the nut to 12 ft. lbs. while gently spinning the wheel, then adjust the bearings



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Fig. Fig. 15: After the bearings are adjusted, install the dust cap by gently tapping on the flange-DO NOT damage the cap by hammering on the center

  1. Remove the wheel covers, if equipped, and loosen the lug nuts, then raise and secure the vehicle.
  2.  
  3. Remove the lug nuts, wheel and tire, and brake drum or disc brake caliper.
  4.  
  5. Insert a wood spacer between the brake calipers on disc brake vehicles, and secure the assembly out of the way.
  6.  
  7. Pry off the grease cap and extract the cotter pin from the spindle nut. Back off the spindle nut and washer, and remove the hub and disc. Be careful not to drop the outer bearing as the hub comes off.
  8.  

BEARING REPLACEMENT & ADJUSTMENT



  1. Disassembly of the hub removed the outer roller bearing assembly. The inner roller bearing remains in the hub, held in place by the inner bearing lip seal.
  2.  
  3. Pry out this seal, discard it, and remove the inner roller bearing assembly.
  4.  

If the bearings are going to be reused, it is not necessary to remove the races. If this is the case, disregard steps 3, 4, 5 and 9.

  1. Select a suitable brass drift punch and insert it through the inner opening of the hub so that it catches the outer bearing race. Notches are provided in the hub for this purpose.
  2.  
  3. Tap the outer bearing race out. DO NOT attempt to tap the race out from the same spot-move the punch from side-to-side to drive the race out evenly.
  4.  
  5. Repeat steps 3 and 4 for the inner race, but insert the race through the outer opening of the hub to catch the inner race.
  6.  

Never match a new bearing to an old race (or vice-versa) during assembly-excessive bearing wear will result.

  1. Inspect the races. The bearing surfaces must be perfectly smooth with no signs of discoloration.
  2.  
  3. Thoroughly clean the bearings and the inside of the hub. Blow the bearings dry with compressed air and wipe out the hub.
  4.  


CAUTION
DO NOT "spin" the bearings with the compressed air; the bearing rollers could shatter. Be sure that all traces of cleaning solvent are removed after cleaning.

  1. Inspect the bearings. The rollers should be perfectly smooth; the bearing cage should not be deformed. To inspect the inner race of either bearing: Turn the cage and rollers around the race while holding the rollers inward and the race stationary. If any grinding or chattering is felt while turning, the bearing assembly should be replaced with a new unit.
  2.  
  3. Pack each bearing by placing a "ball" of grease on your palm and pushing the larger side of the bearing into the grease with your other hand, forcing the grease into the cage and rollers and out of the narrow side of the bearing. The object of this is to pack the grease between the rollers-smearing grease on the outside of the bearing will do no good whatsoever. Set the packed bearings aside, on a clean surface.
  4.  
  5. If the races were removed, drive the new races evenly and firmly into place and lightly coat the races with grease.
  6.  
  7. Install the inner bearing and evenly tap the new inner seal into place. Clean the bearing and seal areas of the spindle. Lubricate both the spindle and the inner seal lip with a light coat of grease.
  8.  
  9. Carefully install the hub or hub and disc assembly. Install the outer bearing, washer, and spindle nut.
  10.  
  11. On 1963-64 models, assemble the backing plate and drum assembly. On later models, remove the spacer block from the caliper and position the caliper on the caliper bracket, over the disc. Install and torque the caliper mounting bolts to 70 ft. lbs.
  12.  
  13. Install the wheel and tire assembly and torque the lug nuts to 75 ft. lbs.
  14.  
  15. Adjust the bearings and complete the operation as follows:
    1. Hand-spin the wheel and tire and torque the spindle nut to 12 ft. lbs.
    2.  
    3. Loosen the spindle nut then tighten it snug, by hand.
    4.  
    5. Loosen the nut just until the cotter pin holes align.
    6.  
    7. Install the cotter pin. Bend the ends of the cotter pin against the nut then cut off the extra length to prevent interference with the dust cap. Install the dust cap.
    8.  
    9. Spin the wheel-it should rotate smoothly and without any signs of grinding. If a dial indicator is available, set it up against the outer surface of the wheel, parallel to the spindle centerline. Rock the tire in and out; total end-play should be 0.001-0.005 in.
    10.  

  16.  

 
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