Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Hydraulic Brake System Flushing

Chevrolet Sonic Repair Manual / Chassis / Brakes / Hydraulic Brakes / Hydraulic Brake System Flushing

Warning:

Refer to Brake Fluid Irritant Warning.

Caution:

Refer to Brake Fluid Effects on Paint and Electrical Components Caution.

  1. Inspect the brake fluid for the following conditions, indicating brake fluid contamination:
  • Inspect the master cylinder reservoir cap diaphragm and the reservoir-to-master cylinder grommets for swelling, indicating brake fluid contamination.
  • If the brake fluid WAS contaminated with an oil-based or a silicone-based substance, indicated by fluid separation and/or a swollen master cylinder reservoir cap diaphragm and/or swollen reservoir-to-master cylinder grommets, perform the following:
    1. Remove ALL of the following components listed from the vehicle. Each component contains internal rubber seals/linings which have been contaminated by the contaminated brake fluid in the brake hydraulic system.

      Refer to the procedures indicated:

  • Clean out all the hydraulic brake pipes using denatured alcohol, or equivalent.
  • Dry the brake pipes using non-lubricated, filtered air.
  • Repair or replace ALL of the following components listed and install them to the vehicle. Each component contains internal rubber seals/linings which have been contaminated by the contaminated brake fluid in the brake hydraulic system.

    Refer to the procedures indicated:

  • If the brake fluid WAS NOT contaminated with an oil-based or a silicone-based substance, but WAS contaminated with water or dirt, rust, corrosion, and/or brake dust, replace the brake master cylinder reservoir cap diaphragm which may have allowed the moisture or particles to enter the hydraulic system.
  • Fill the brake master cylinder reservoir to the maximum-fill level with the approved brake fluid from a clean, sealed brake fluid container.
  • Pressure bleed the hydraulic brake system. Begin the procedure with the pressure bleeder reservoir filled to the maximum-fill level with the correct brake fluid as indicated. Refer to Hydraulic Brake System Bleeding.
  • Hydraulic Brake System Description and Operation
    System Component Description The hydraulic brake system consists of the following: Hydraulic Brake Master Cylinder Reservoir Contains a supply of brake fluid for the hydraulic br ...

    Master Cylinder Reservoir Filling
    Warning: Refer to Brake Fluid Irritant Warning. Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution. Visually inspect the brake fluid level through the ...

    Other materials:

    Cruise Control Description and Operation
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    Ignition Lock Cylinder Replacement
    Removal Procedure Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection. Remove the upper trim cover and the lower trim cover from the steering column. Refer to Steering Column Lower Trim Cover Replacement. Insert the k ...

    Rear Side Door Weatherstrip Replacement - Door Side
    Rear Side Door Weatherstrip Replacement - Door Side Callout Component Name 1 Rear Side Door Weatherstrip Procedure Open the front side door to the fully open position. Remove the front side door check link bo ...

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