Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

Brake Shoes

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INSPECTION



See Figure 1



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Fig. Fig. 1: Measuring the brake lining thickness-bonded type lining shown

  1. Remove the brake drum.
  2.  
  3. Using a ruler, or similar tool, measure the shoe lining thickness as follows:

    On bonded type linings-measure the minimum height the lining extends above the steel shoe.
     
    On riveted type linings-measure the minimum height the lining extends above the rivet head.
     

  4.  

  1. Compare the readings to the specification found in the Brake Specifications chart at the end of this section.
  2.  

This measurement may disagree with your state inspection laws.

  1. When replacing brake shoes, always check the surface of the brake drums for scoring or wear. The brake drums should resurfaced or machined if badly scored.
  2.  

REMOVAL & INSTALLATION




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.

1982-90 Vehicles
  1. Refer to the Brake Drum removal and installation procedures in this section, and remove the brake drum.
  2.  
  3. Clean all brake hardware, using an approved brake cleaner and catch the run off with a pan.
  4.  

It is a good practice to clean the dust from the from the brake components prior to disassembly. This will prevent excessive contact with the brake dust.

  1. Service one side at a time. Use the other as an example for installation. Release the parking brake lever, then remove the anti-rattle spring and the pin from the brake shoes.
  2.  

To remove the anti-rattle spring and pin, push the spring/pin assembly into the brake shoe, turn it 90° and release it; the retainer cap, spring, washer and pin will separate.

  1. Supporting the brake shoe assembly, remove the return springs and brake shoes.
  2.  

If the brake shoes are difficult to remove, loosen the brake adjusters. Place a heavy rubber band around the cylinder to prevent the piston from coming out.

To install:
  1. Clean the backing plate and check the wheel cylinder for leaks.
  2.  
  3. Lubricate the backing plate pads and the screw adjusters with lithium base grease.
  4.  
  5. Install the brake shoes and springs.
  6.  
  7. Install the drum assembly.
  8.  
  9. Adjust brakes and bleed system if necessary.
  10.  

1991-96 Vehicles

See Figures 2, 3, 4, 5 and 6



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Fig. Fig. 2: Prior to disassembly, use a spray type brake cleaner to remove dust from the brake hardware



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Fig. Fig. 3: Use a small screwdriver to remove the parking brake toggle lever retaining ring



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Fig. Fig. 4: Assemble the brake components on the bench, as shown



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Fig. Fig. 5: If the hub is in the way, use needlenose pliers to remove and install the adjuster spring



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Fig. Fig. 6: Verify that all brake components are correctly installed before installing the rear brake drum

If you are not familiar with the procedures involved in brake replacement, disassemble and assemble one side at a time, leaving the other wheel intact, as a reference. This will reduce the risk of assembling brakes incorrectly. Special brake tools are available to make this repair easier.

  1. Raise and support the vehicle safely.
  2.  
  3. Remove the rear wheels.
  4.  
  5. Release the parking brake and remove the brake drum.
  6.  
  7. Clean all brake hardware, using an approved brake cleaner and catch the run off with a pan.
  8.  

It is a good practice to clean the dust from the from the brake components prior to disassembly. This will prevent excessive contact with the brake dust.

  1. Place a heavy rubber band or clamp around the wheel cylinder to prevent the piston from coming out.
  2.  
  3. Remove the return springs, adjuster assembly, hold-down springs, and the brake shoes.
  4.  
  5. Disconnect the parking brake cable from the toggle lever.
  6.  
  7. Remove the retainer ring and the toggle lever from the brake shoe.
  8.  

To install:
  1. Clean the backing plate and check the wheel cylinder for leaks.
  2.  
  3. The brake drums must be machined if scored or out of round.
  4.  
  5. Install the toggle lever to the proper brake shoe and secure with the retainer ring.
  6.  
  7. Connect the parking brake cable to the toggle lever.
  8.  
  9. Hook the return springs into the new shoes. The return spring ends should be between the shoes and the backing plate. The longer return spring must be adjacent to the wheel cylinder. A very thin film of lithium grease may be applied to the pivot points at the ends of the brake shoes. Also, grease the shoe locating buttons on the backing plate.
  10.  

Be careful not to get grease on the linings or drums.

  1. Install the adjuster assembly (rotate nut until adjuster rod is at its shortest point) between brake shoes. Place one shoe in the adjuster and piston slots and pry the other shoe into position.
  2.  
  3. Position the brake shoes on the backing plate and secure in place using the hold-down springs.
  4.  

Before installing the brake drum, inspect the assembled brake components. Verify that all components are properly positioned and secured in place.

  1. Install the drums and wheels.
  2.  
  3. Adjust the brakes and bleed the hydraulic system, if necessary.
  4.  
  5. Lower the vehicle and road test it for proper brake system operation.
  6.  

 
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