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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Drum Brake System) >> Repair Instructions >> Rear Brake Cylinder Overhaul >> Disassembly Procedure

Disassembly Procedure

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
    WARNING: Refer to Brake Dust Warning .
    WARNING: Refer to Brake Fluid Irritant Warning .
  2. Remove the rear brake cylinder. Refer to Rear Brake Cylinder Replacement .
  3. Remove and discard the brake cylinder dust seals (1).
    Fig 1: Brake Cylinder Dust Seals
    GM2507691Courtesy of GENERAL MOTORS COMPANY
  4. Remove the brake cylinder pistons (1) and spring (2).
    Fig 2: Brake Cylinder Pistons & Spring
    GM2507692Courtesy of GENERAL MOTORS COMPANY
  5. Remove and discard the brake cylinder piston seals.
  6. Inspect the brake cylinder bore for excessive corrosion, scoring, nicks and pitting.
  7. If the brake cylinder bore exhibits the above conditions, the brake cylinder assembly requires replacement.
  8. Remove light corrosion in the cylinder bore with a fine crocus cloth.
  9. Thoroughly clean the brake cylinder and pistons with denatured alcohol and dry with filtered, non-lubricated compressed air.