34 31 500 Removing and installing/replacing tandem brake master cylinder

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2019 MINI Cooper, 2018 MINI Cooper, 2017 MINI Cooper, 2016 MINI Cooper, and 2015 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

32 1 270

Necessary preliminary work:

Read and comply with GENERAL INSTRUCTIONS .
Remove EXPANSION TANK .
Remove BATTERY .

IMPORTANT:

Before beginning the repair, fully press the brake pedal several times to reduce the vacuum in the brake servo.

Do not bend brake lines.

Close off brake lines and tandem brake master cylinder with seal plugs 32 1 270 .

Unfasten brake lines (1).

Release nuts (2) and feed tandem brake master cylinder out of brake servo.

Fig 1: Pulling Tandem Brake Master Cylinder Out Of Brake Servo

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace sealing ring (1).

Check rubber plugs (2) and replace if necessary.

Fig 2: Sealing Ring And Rubber Plug Of Tandem Brake Master Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.

When inserting the tandem brake master cylinder (1) into the brake servo, make sure the anti-roll bar link of the brake servo and the tandem brake master cylinder meet each other on one level.

Fig 3: Inserting Tandem Brake Master Cylinder Into Brake Servo

Courtesy of BMW OF NORTH AMERICA, INC.

Insert nuts (2) and tighten.

Replace self-locking nuts.

Tightening torque 34 31 1AZ .

Insert brake lines (1) and tighten down.

Tightening torque 34 32 1AZ .

Fig 4: Pulling Tandem Brake Master Cylinder Out Of Brake Servo

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Bleed BRAKE SYSTEM with DSC.