Chevrolet Full-size Cars 1968-1978 Repair Guide

Brake Shoes

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REMOVAL & INSTALLATION





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Fig. Fig. 1 Exploded view of the rear drum brake assembly



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Fig. Fig. 2 After the wheel has been removed ...



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Fig. Fig. 3 ... remove the brake drum by grasping it firmly and pulling straight out from the axle



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Fig. Fig. 4 Service one side at a time. This way you can use the other side as a reference



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Fig. Fig. 5 Start the shoe removal procedure by disconnecting the brake shoe return springs



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Fig. Fig. 6 Once the spring tension is removed, simply pull the springs out of the brake assembly



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Fig. Fig. 7 Loosen the spring tension on the hold-down springs by pushing in and twisting 90 degrees ...



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Fig. Fig. 8 ... then remove the hold-down spring and pull the hold-down pins out of the backing plate



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Fig. Fig. 9 Remove the adjusting lever assembly



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Fig. Fig. 10 Remove the lower return spring, brake adjuster assembly and the brake shoe



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Fig. Fig. 11 Remove the parking brake strut assembly-pay attention to its orientation for reassembly



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Fig. Fig. 12 Finally, remove the last brake shoe by disconnecting the parking brake lever from the shoe



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Fig. Fig. 13 View of the drum brake components



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Fig. Fig. 14 A special drum brake tool is available to make installing the springs easier

Disassemble one side at a time so that you may use the unassembled side for reference during reassembly.

  1. Raise the vehicle and support it on safety stands.
  2.  
  3. Slacken the parking brake cable if necessary.
  4.  
  5. Remove the rear wheel and brake drum-refer to the necessary service procedure.
  6.  
  7. Free the brake shoe return springs, actuator pull-back spring, hold-down pins and springs and actuator assembly.
  8.  

Special tools available from auto supply stores will ease removal of the spring and anchor pin, but the job may still be done with common hand tools.

  1. Disconnect the adjusting mechanism and spring, and remove the primary shoe. The primary shoe has a shorter lining than the secondary and is mounted at the front of the wheel.
  2.  
  3. Disconnect the parking brake lever from the secondary shoe and remove the shoe.
  4.  

To install:

  1. Clean and inspect all brake parts.
  2.  
  3. Check the wheel cylinders for seal condition and leaking.
  4.  
  5. Inspect the replacement shoes for nicks or burrs, lubricate the backing plate contact points, brake cable and levers, and adjusting screws and then assemble using the unassembled side as a reference.
  6.  

Make sure that the right and left-hand adjusting screws are not mixed. You can prevent this by working on one side at a time. This will also provide you with a reference for reassembly. The star wheel should be nearest to the secondary shoe when correctly installed.

When completed, make an initial adjustment as previously described.

Maintenance procedures for the metallic lining option are the same as those for standard linings. Do not substitute these linings in standard drums, unless they have been honed to a 20 micro-inch finish and equipped with special heat resistant springs.

 
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