GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1998 🢒 Silhouette 🢒 Brakes 🢒 Antilock Brake System 🢒 Master Cylinder Reservoir Replacement

Removal Procedure
  1. Remove the ABS hydraulic modulator/master cylinder. Refer to Antilock Brake System.

    2. Notice: Do not overtighten vise, or damage to the master cylinder will result.

  2. Clamp the flange on the master cylinder body in a vise. Do not clamp the master cylinder body.

    3. Object Number: 176838 Size: SH
  3. Drive out the spring pins. Use a suitable 1/8 inch punch. Do not damage the reservoir or the cylinder body when pushing out the pins.

    4. Object Number: 176839 Size: SH
  4. Remove the reservoir body by pulling the body straight up and away from the cylinder body.
  5. Remove the O-rings from the grooves in the reservoir.
  6. Inspect the reservoir for cracks or deformation. Replace the reservoir if necessary.
  7. Clean the reservoir. Use clean denatured alcohol.
  8. Dry the reservoir. Use non-lubricated compressed air.

Installation Procedure
  1. Lubricate the new O-rings and the reservoir-to-housing fittings. Use clean brake fluid.
  2. Insert the O-rings into the grooves in the reservoir. Ensure that the O-rings are properly seated.

    3. Object Number: 176839 Size: SH
  3. Install the reservoir to the master cylinder body. Use your hand in order to push the reservoir straight down into the body.

    4. Object Number: 176838 Size: SH
  4. Install the spring pins in order to retain the reservoir. Do not damage the reservoir or the cylinder body.
  5. Install the ABS hydraulic modulator/master cylinder. Refer to Antilock Brake System.