Roadmaster 1992

Wheel Hubs & Bearings

Print

Adjustment



  1. Before servicing the vehicle, refer to the Precautions Section.
    NOTE
    Disconnecting the negative battery cable on some vehicles may interfere with the functions of the on-board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is reconnected.


    NOTE
    Tapered bearings have a slightly loose feel when properly adjusted.

  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Raise and safely support the vehicle.
  6.  
  7. Remove the dust cap, cotter pin from the spindle nut. Discard the cotter pin.
  8.  
  9. Turn the tire and wheel assembly forward, by hand, to fully seat the bearings.
  10.  
  11. Tighten the spindle nut to 12 ft. lbs. to seat the bearings.
  12.  
  13. Back off the spindle nut to the -just loose- position.
  14.  
  15. Hand tighten the spindle nut. Loosen the nut until either hole in the spindle lines up with the slot in the nut, not more than ½ inch flat.
  16.  
  17. Install a new cotter pin.
  18.  
  19. Measure the looseness in the hub assembly. There should be 0.001-0.005 inch end play when the bearings are properly adjusted.

    Click image to see an enlarged view

    Fig. Front wheel bearing diagnosis (1 of 2)



    Click image to see an enlarged view

    Fig. Front wheel bearing diagnosis (2 of 2)



    Click image to see an enlarged view

    Fig. Front wheel bearing adjustment

  20.  

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
    NOTE
    Disconnecting the negative battery cable on some vehicles may interfere with the functions of the on-board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is reconnected.


    NOTE
    If working near and/or around the SRS system and components, be sure to properly disable the SRS system. See disarming/arming the SRS system.


    NOTE
    For vehicles equipped with OnStar (RPO UE1), with battery backup, the backup battery is a redundant power supply to allow limited ONStar functionality in the event of a main battery power disruption to the OnStar module (VCIM). Do not disconnect the main vehicle battery or remove the OnStar fuse with the ignition key in any position other than OFF. Retained accessory power should be allowed to time out or be disabled by opening the driver-s side door before disconnecting power. Disconnecting power to the module in any way while the ignition is ON or with the retained accessory power activated may cause activation of the OnStar backup battery system and will discharge and permanently damage the backup battery. Once the backup battery is activated it will stay on until it has completely discharged. The backup battery is not rechargeable and once it is activated, it must be replaced.

  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. Remove the tire and wheel assemblies.
  6.  
  7. Remove the brake caliper. Do not allow the caliper to hang by the brake hose.
  8.  
  9. Remove the dust cap, cotter pin, spindle nut and washer. Discard the cotter pin.
  10.  
  11. Remove the outer bearing assembly.
  12.  
  13. Remove the rotor.
  14.  
  15. Remove the outer bearing and race assembly from the rotor. Discard the oil seal.

    Click image to see an enlarged view

    Fig. Front wheel bearing diagnosis (1 of 2)



    Click image to see an enlarged view

    Fig. Front wheel bearing diagnosis (2 of 2)



    Click image to see an enlarged view

    Fig. Front wheel bearings and related components

  16.  

To install:


NOTE
Be sure to use new fasteners, as required.


NOTE
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread sealer are identified. Do not use paints, lubricants or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners.

  1. Installation is the reverse of the removal procedure.
  2.  
  3. When installing the outer bearing and race refer to the illustrations for proper tool positioning and installation. Be sure to use a new oil seal.

    Click image to see an enlarged view

    Fig. Front inner wheel bearing installation (1 of 2)



    Click image to see an enlarged view

    Fig. Front inner wheel bearing installation (2 of 2)

  4.  
  5. Using the GM diagnostic scan tool or aftermarket equivalent reprogram the necessary systems and components. Be sure to follow the scan tool manufacturer-s directions.
  6.  

 
label.common.footer.alt.autozoneLogo