Brake Master Cylinder Removal and Installation

Do not spill brake fluid on the vehicle; it may damage the paint. If brake fluid does contact the paint, wash it off immediately with water.

NOTE:
Press the brake pedal several times to deplete the vacuum in the brake booster.
Be careful when handling the master cylinder. Do not hold it at the piston, or the piston may separate from the body. If the piston separates from the body, then the master cylinder must be replaced. Do not reinsert the piston back into the master cylinder body.
After removal, plug the end of the hose and joints to prevent spilling brake fluid.
M/T is sharing the master cylinder reservoir with the brake system and the clutch system. Bleed the air foam from the brake system and the clutch system after installing the master cylinder.
Unless otherwise indicated, illustrations used in the procedure are for M/T.

1. Brake Fluid - Remove
1.
Remove the brake fluid from the master cylinder reservoir with a syringe.

2. Master Cylinder - Remove
1.
Disconnect the connector (A).
2.
Remove the wire harness (B) from the master cylinder reservoir (C).
3.
M/T: Remove the clutch reservoir hose (A) from the master cylinder reservoir (B).
4.
Disconnect the brake lines (A) from the master cylinder (B). To prevent spills, cover the hose joints with clean rags or shop towels.
5.
Remove the nuts (C) and the washers (D).
6.
Remove the master cylinder from the brake booster (E).
NOTE: Be careful not to bend or damage the brake lines.
7.
Remove the O-ring (F) from the master cylinder.
NOTE: Replace the O-ring whenever master cylinder is removed.

3. All Removed Parts - Install
1.
Install the master cylinder with the new O-ring in the reverse order of removal, and note these items:
Coat the new O-ring with the silicone grease (Shin-Etsu G40M).
Make sure not to get any silicone grease on the terminal part of the connectors and switches, especially if you have silicone grease on your hands or gloves.
Be careful not to bend or damage the bake lines.
Be careful not to damage the piston surface.

7. Brake Drag - Check
1.
Spin the wheels to check for brake drag.