Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Rear Brake Cylinder Overhaul

Chevrolet Sonic Repair Manual / Chassis / Brakes / Drum Brakes / Rear Brake Cylinder Overhaul

Disassembly Procedure

    Warning:

    Refer to Brake Dust Warning.

    Warning:

    Refer to Brake Fluid Irritant Warning.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove the rear brake cylinder. Refer to Rear Brake Cylinder Replacement.


  3. Remove and discard the brake cylinder dust seals (1).

  4. Remove the brake cylinder pistons (1) and spring (2).
  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.
Assembly Procedure
  1. Lightly lubricate the new piston seals and brake cylinder bore with GM approved brake fluid from a clean, sealed, brake fluid container.
  2. Assemble the new piston seals with the lip of the seals facing inward to the brake cylinder pistons.

  3. Install the brake cylinder pistons (1) and spring (2) into the brake cylinder bore.

  4. Note:

    Do not lubricate the brake cylinder dust seals.

  5. Install the new brake cylinder dust seals (1).
  6. Install the rear brake cylinder. Refer to Rear Brake Cylinder Replacement.
  7. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding.
Rear Brake Backing Plate Replacement
Removal Procedure Warning: Refer to Brake Dust Warning. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle. Remove the tire and wheel assembly. Refer ...

Rear Brake Cylinder Replacement
Removal Procedure Warning: Refer to Brake Dust Warning. Warning: Refer to Brake Fluid Irritant Warning. Raise and support the vehicle. Refer to Lifting and Jacki ...

Other materials:

Driver or Passenger Seat Shoulder Belt Replacement (with A69)
Driver or Passenger Seat Shoulder Belt Replacement Callout Component Name Warning: Refer to SIR Warning. Warning: Refer to SIR Inflator Module Handling and Storage Warning. Warning: Refer to SIR ...

Clutch Actuator Cylinder Front Pipe Replacement
Removal Procedure Remove the battery tray. Refer to Battery Tray Replacement. Remove as much brake fluid out of brake fluid reservoir as possible. Unclip the clutch actuator cylinder front pipe from the 2 retainers (1). Remove the retaining ...

Throttle Body Inspection and Cleaning
Note: Over extended time and mileage, deposits may accumulate on the back of the throttle valve plate. The source of the deposit is exhaust gas. Typically these deposits pose no problem. Occasionally the deposit may accumulate to a point where perceived pedal effort or throttle valve mov ...

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