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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 673 (Drum Brake System) >> Repair Instructions >> Drum Brake Adjustment >> Tools Required

Tools Required

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

J 21177-A  Drum to Brake Shoe Clearance Gage. See Special Tools .

CAUTION: Refer to Brake Dust Caution .
    Fig 1: Locating Front Park Brake Adjusting Nut
    GM891317Courtesy of GENERAL MOTORS CORP.
  1. Ensure that the park brake lever is in the fully released position.
  2. Release the park brake lever boot from the floor console by applying light pressure inward on the sides of the boot retainer.
  3. Pull the boot away from the console to expose the front park brake cable adjusting nut (1).
  4. Release the tension from the park brake cable system at the front cable adjusting nut (1).

    Using ONLY HAND TOOLS, loosen the adjusting nut (1) completely to the end of the front cable threaded rod.

    5. Fig 2: Measuring Inside Brake Drum Diameter
    GM891757Courtesy of GENERAL MOTORS CORP.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  6. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation (4 Lug Wheel) or Tire and Wheel Removal and Installation (5 Lug Wheel) .
  7. Remove the brake drums. Refer to Brake Drum Replacement .
  8. Position the J 21177-A  to widest point of the brake drum inside diameter. See Special Tools .
  9. Firmly hand tighten the set screw on the J 21177-A  . See Special Tools .
    10. Fig 3: Measuring Outside Diameter Of Brake Shoe Assembly
    GM891758Courtesy of GENERAL MOTORS CORP.
  10. Remove the J 21177-A  from the brake drum and position it over the corresponding brake shoe assembly at its widest point. See Special Tools .
  11. While holding the J 21177-A  in position, insert a 0. See Special Tools .635 mm (0.025 in) feeler gage between one side of the J 21177-A  , and the corresponding brake shoe lining. See Special Tools .
  12. Rotate the brake shoe adjuster screw until the brake shoe linings contact the J 21177-A  , and the feeler gage. See Special Tools .

    Specification:  Brake shoe lining-to-drum clearance: 0.635 mm (0.025 in)

  13. Repeat the above steps for the opposite brake drum and brake shoe assembly.
  14. Install the brake drums. Refer to Brake Drum Replacement .
  15. Adjust the park brake. Refer to Park Brake Adjustment (Disc) or Park Brake Adjustment (Drum) .
  16. Install the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation (4 Lug Wheel) or Tire and Wheel Removal and Installation (5 Lug Wheel) .
  17. Lower the vehicle.
  18. Position the park brake lever boot to the floor console and press the boot retainer into place to secure.
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