Nissan Pick-ups and Pathfinder 1989-1995

Brake Drums

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CAUTION
Brake shoes may contain asbestos, which has been determined to be a cancer causing agent. Never clean the brake surfaces with compressed air! Avoid inhaling any dust from any brake surface! When cleaning brake surfaces, use a commercially available brake cleaning fluid.

REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4

We recommend replacement of the brake drum in axle sets for added safety and reliability.

  1. Remove the hub cap and loosen the lug nuts.
  2.  
  3. Raise the rear of the vehicle and safely support it on jackstands.
  4.  
  5. Remove the lug nuts, tire and wheel.
  6.  
  7. Loosen the brake adjustment, if necessary, then remove the brake drum. Inspect the brake drum, as described below.
  8.  

Do not depress the brake pedal with the brake drum removed.

  1. Installation is the reverse of the removal procedure. Adjust the brakes, if necessary.
  2.  



Click image to see an enlarged view

Fig. Fig. 1: View of the brake drum installed on the vehicle-note the two holes in the drum between the wheel studs



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Fig. Fig. 2: If the drum is difficult to pull off, try threading two bolts into the holes ...



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Fig. Fig. 3: ... and tighten them until the drum comes free



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Fig. Fig. 4: View of the brake drum removed from the vehicle-note that brake dust often contains asbestos

INSPECTION



See Figure 5

  1. Clean the drum with a rag and a little paint thinner.
  2.  


CAUTION
Do not blow the brake dust out of the drum with compressed air or lung power. Brake linings may contain asbestos, a known cancer causing agent.

  1. Inspect the drum for cracks, grooves, scoring and out-of-roundness.
  2.  
  3. Light scoring may be removed with fine emery paper; heavy scores or grooves will require turning the drum on a lathe. This can be done at many automotive machine shops and some service stations.
  4.  
  5. If turning the drum is indicated, it must first be measured to determine whether or not the inside dimension of the drum will be within limitations after removing the score marks. The service limits of the brake drums are detailed in the Brake Specifications chart.
  6.  
  7. Check the drum for concentricity. An inside micrometer is necessary for an exact measurement; unless this tool is available, the drum should be taken to a machine shop to be checked. Any drum which measures more than 0.006 in. (0.15mm) out-of-round will likely result in an inaccurate brake adjustment or other problems, and should be refinished or replaced.
  8.  

Make all measurements at right angles to each other, and at the open and closed edges of the drum machined surface.



Click image to see an enlarged view

Fig. Fig. 5: Checking the brake drum inner diameter

 
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