34 31 181 Removing and installing/replacing expansion tank for hydraulic brake actuation

Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Extract brake fluid out of expansion tank. Use a suction bottle used exclusively for drawing off brake fluid.

Do not reuse drawn out brake fluid.

If necessary, pull off supply hose of clutch hydraulic system if necessary.

Unfasten plug connection (1) and disconnect.

Release screw (2).

Pull expansion tank in direction of arrow vertically out of brake master cylinder.

Fig 1: Pulling Expansion Tank Out Of Brake Master Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Check rubber plug in brake master cylinder for damage and replace if necessary.

Push the expansion tank vertically onto the master brake cylinder.

After installation:

Fig 2: Pushing Expansion Tank Onto Master Brake Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.