34 11 220 Removing And Installing/Replacing Both Front Brake Discs

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NOTE:

For Special Tool identification, see BRAKES - SPECIAL TOOLS .

Special Tools Required:

34 1 280

Necessary Preliminary Tasks:

Remove wheels. Refer to 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL .
If necessary, remove and clean brake linings. Refer to 34 11 000 REMOVING AND INSTALLING/REPLACING BRAKE LININGS ON BOTH FRONT DISC BRAKES .

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

Check minimum brake disc thickness:

Position special tool 34 1 280 at three measuring points in area (1) and measure.
Compare measurement result and lowest value with setpoint value. Refer to SPECIFICATIONS .

New brake linings may only be installed if the brake disc thickness is greater than or equal to the minimum brake disc thickness (MIN TH). Refer to SPECIFICATIONS

Always replace brake discs in pairs.

If the brake discs are replaced, you must also fit new brake linings.

Fig 1: Identifying Measuring Points On Brake Disc

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1), remove brake caliper and tie up.

Installation:

Tightening torque, refer to 34 11 2AZ in BRAKES - TIGHTENING TORQUES .

NOTE: Brake hose remains connected. If the brake hose was pulled from the mounting fixture during removal, make sure it is positively attached when installed!

Fig 2: Identifying Brake Caliper Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew bolts and take off brake disc.

Installation:

Tightening torque, refer to 34 11 1AZ in BRAKES - TIGHTENING TORQUES .

Clean contact surface of brake disc at wheel hub thoroughly; remove traces of corrosion if necessary. Unevenness on contact surface may result in distortion of brake disc!

Fig 3: Unscrewing Bolts Of Brake Disc

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: To release brake disc: Do not under any circumstances strike friction ring with a hammer or similar! If necessary, carefully tap on base of brake disc chamber with a rubber mallet.

IMPORTANT: Internally ventilated brake discs are balanced. Never remove or reposition balance clips.

Fig 4: Identifying Internally Ventilated Brake Disc

Courtesy of BMW OF NORTH AMERICA, INC.