Mazda Trucks 1972-1986 Repair Guide

Brake Drums

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REMOVAL & INSTALLATION



See Figures 1 through 7

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Fig. Fig. 1: To remove the brake drums, matchmark the drum to the center hub, then remove the drum attaching screws ...



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Fig. Fig. 2: ... and insert them into the threaded holes in the drumtighten the screws evenly to draw the drum off the hub



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Fig. Fig. 3: Once it is free of the center hub, grasp the drum and pull it free of the rear axle



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Fig. Fig. 4: Look for hard or chill spots on the drum surface



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Fig. Fig. 5: If a tool mark ridge is visible in the drum, measure the inside diameter to determine if the drum is over the maximum allowable size; if so, the drum must be replaced



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Fig. Fig. 6: Look for small heat checks that may be able to be machined out of the drumexcessive checking may require replacement



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Fig. Fig. 7: If the drum is in good condition, lightly sand the inside surface to deglaze the drum

  1. Raise and support the rear end on jackstands.
  2.  
  3. Remove the wheels.
  4.  
  5. Remove the drum attaching screws and insert them in the threaded holes in the drum. Turn the screws inward, evenly, to force the rum off the hub.
  6.  
  7. Thoroughly inspect the drum. Discard a cracked drum. If the drum is suspected of being out of round, or shows signs of wear or has a ridged or rough surface, have it turned on a lathe at a machine shop. The maximum oversize is stamped into the drum.
  8.  
  9. Installation is the reverse of removal. Make sure that the holes are aligned for the attaching screws. Tighten the screws evenly to install the drum.
  10.  

 
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