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Home >> Chevrolet >> 2007 >> Optra5 LT, Automatic >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Repair Instructions >> Master Cylinder Overhaul >> Disassembly Procedure

Disassembly Procedure

    Fig 1: View Of Cylinder Bore Seal Ring
    GM1289942Courtesy of GENERAL MOTORS CORP.
  1. Remove the master cylinder. Refer to Master Cylinder Replacement .
  2. Remove the brake fluid reservoir. Refer to Master Cylinder Reservoir Replacement .
  3. Remove the seal ring from the cylinder bore.
    4. IMPORTANT: When removing the retaining ring, avoid damaging the piston or the cylinder wall.
    IMPORTANT: A welding rod or its equivalent can be used in a compensating port to keep the piston depressed.
  4. Remove and discard the retaining ring from the cylinder body using a suitable screwdriver. The non-antilock brake system (ABS) master cylinder body is shown.
    5. Fig 2: View Of Master Cylinder Components
    GM1289944Courtesy of GENERAL MOTORS CORP.
  5. Remove the primary piston. The ABS master cylinder body is shown.
  6. Carefully remove the secondary piston assembly, including the springs, from the master cylinder bore.
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