34 31 505 Removing And Installing/Replacing Master Brake Cylinder For DSC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 BMW 760Li, 2006 BMW 760i, 2006 BMW 760Li, 2005 BMW 760i, and 2005 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see STEERING AND WHEEL ALIGNMENT - SPECIAL TOOLS .

Special Tools Required:

32 1 270

Necessary Preliminary Tasks:

Read and comply with General Information. Refer to 34 00 ... GENERAL INFORMATION .
Remove expansion tank. Refer to 34 31 181 REMOVING AND INSTALLING/REPLACING EXPANSION TANK FOR HYDRAULIC BRAKE ACTUATION .

Observe safety instructions on raising the vehicle. Refer to 00..... LIFTING VEHICLE WITH A LIFTING PLATFORM .

After completing tasks, bleed brake system. Refer to 34 00 025 REPLACING FLUID IN ABS/ASC+T BRAKE SYSTEM .

Unfasten brake lines.

Installation:

Tightening torque, refer to 34 32 1AZ in BRAKES - TIGHTENING TORQUES .

Seal off brake lines and brake master cylinder with special tool 32 1 270 (plug).

Fig 1: Locating Brake Lines

Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts and withdraw brake master cylinder from brake booster.

Installation:

Replace self-locking nuts.

Tightening torque, refer to 34 31 1AZ in BRAKES - TIGHTENING TORQUES .

Fig 2: Releasing Brake Master Cylinder Retaining Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace O-rings.

Fig 3: Identifying O-Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

When inserting the brake master cylinder (2) into the brake booster (1), make sure the pressure rod of the brake booster and that of the brake master cylinder meet each other on one level.

Fig 4: Inserting Brake Master Cylinder Into Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.