Mazda B-Series 1998-06

Locking Hubs

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Disassembly & Assembly



While the 1998 B Series Pick-up is technically equipped with automatic locking hubs, the system is mounted to the axle housing itself and is called a vacuum disconnect axle lock.

Removal & Installation





Click image to see an enlarged view

Fig. Exploded view of the automatic locking hubs and related components



Click image to see an enlarged view

Fig. Exploded view of the locking cam assembly

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Some gentle tapping with a soft-faced hammer may help to loosen the locking hub cover if it seems stuck.



    Negative battery cable
     
    Wheel
     



    Automatic locking hub cover assembly from the rotor by pulling straight outward
     

  4.  
  5. Inspect the O-ring seal on the back-side of the hub assembly and, if damaged, replace it.
    WARNING
    Do not pry on the locking cam or thrust spacers during removal. Prying may damage the cam or spacers.



    Snap-ring from the end of the splined axle shaft
     
    Axle shaft spacer(s)
     



    Pull the locking cam assembly and the 2 thrust spacers (behind cam assembly) from the wheel bearing adjusting nut.
     

  6.  

To install:

  1. Install or connect the following:

    2 thrust spacers and locking cam into position. Make certain that the key in the cam assembly is aligned with the keyway of the front spindle
     
    Axle shaft spacer(s)
     
    Snap-ring to the end of the splined axle shaft
     
    Locking hub cover to the rotor
     
    Wheel
     
    Negative battery cable
     

  2.  



Click image to see an enlarged view

Fig. Exploded view of the automatic locking hubs and related components



Click image to see an enlarged view

Fig. Exploded view of the locking cam assembly

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Some gentle tapping with a soft-faced hammer may help to loosen the locking hub cover if it seems stuck.



    Negative battery cable
     
    Wheel
     



    Automatic locking hub cover assembly from the rotor by pulling straight outward
     

  4.  
  5. Inspect the O-ring seal on the back-side of the hub assembly and, if damaged, replace it.
    WARNING
    Do not pry on the locking cam or thrust spacers during removal. Prying may damage the cam or spacers.



    Snap-ring from the end of the splined axle shaft
     
    Axle shaft spacer(s)
     



    Pull the locking cam assembly and the 2 thrust spacers (behind cam assembly) from the wheel bearing adjusting nut.
     

  6.  

To install:

  1. Install or connect the following:

    2 thrust spacers and locking cam into position. Make certain that the key in the cam assembly is aligned with the keyway of the front spindle
     
    Axle shaft spacer(s)
     
    Snap-ring to the end of the splined axle shaft
     
    Locking hub cover to the rotor
     
    Wheel
     
    Negative battery cable
     

  2.  
  3. Before servicing the vehicle, refer to the Precautions section.
  4.  
  5. Remove or disconnect the following:

    Right-hand halfshaft
     
    Right-hand axle shaft
     
    Axle seal, with a slide hammer
     
    Axle tube bearing, with a slide hammer
     

  6.  
  7. Clean the bearing and seal surfaces of any foreign debris.
  8.  

To install:

  1. Use an axle bearing replacer and the handle to replace the RH axle tube bearing.
  2.  
  3. Check the bearing depth as shown.
  4.  
  5. Use an axle seal replacer and the handle to replace the axle tube seal.
    NOTE
    Care should be taken not to damage the axle seal surface.



    Click image to see an enlarged view

    Fig. Front axle tube bearing depth

  6.  
  7. Install the axle shaft.
  8.  
  9. Refill the front drive axle to proper level using SAE 80W90.
  10.  
  11. Install the RH halfshaft.
  12.  

 
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