34 11 000 Removing And Installing/Replacing Brake Linings On Both Front Disc Brakes

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NOTE:

For Special Tool identification, see BRAKES - SPECIAL TOOLS .

Special Tools Required:

34 1 080
34 1 280
34 6 320

Necessary Preliminary Tasks:

Remove wheels. Refer to 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL .

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

If necessary, when replacing linings, reset CBS display in accordance with factory specification.

NOTE: After completing work:

Fully depress brake pedal several times so that brake linings contact brake discs.
When installing new brake linings at front and rear axles, brake fluid level must be brought up to "MAX" marking.

Lever out retaining springs (1) in direction of arrow towards rear.

Installation:

Attach retaining spring (1) first at top and bottom and then allow retaining lug (2) to engage in recess of brake caliper housing.

Fig 1: Removing Retaining Spring

Courtesy of BMW OF NORTH AMERICA, INC.

Remove plastic plugs (1).

Fig 2: View Of Plastic Plugs

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Left:

Pull brake lining wear sensor (1) towards rear out of lining. If necessary, replace brake lining wear sensor. Refer to 34 35 001 REPLACING A BRAKE LINING SENSOR .

Release guide screws (2) with special tool 34 1 080. Withdraw brake caliper backwards.

Installation:

Only clean guide screws; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition. Tightening torque, refer to 34 11 3AZ in BRAKES - TIGHTENING TORQUES .

Fig 3: Locating Brake Lining Wear Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Press back brake linings and piston with special tool 34 6 320.

IMPORTANT: When forcing piston back:

Pay attention to brake fluid level in expansion tank; brake fluid that spills over will damage paintwork.

Fig 4: Identifying Special Tool 34 6 320
Courtesy of BMW OF NORTH AMERICA, INC.

Press brake linings inwards and remove.

The two brake linings are seated with a spring in the piston or in the brake caliper housing and must not be mixed up.

IMPORTANT: Mark any worn brake linings.

In the event of one-sided brake lining wear, do not change brake linings round.

Observe minimum brake disc thickness of brake linings. Refer toSPECIFICATIONS .

Clean brake linings.

Do not apply grease to brake pad backplate.

Fig 5: Pressing Brake Linings Inwards

Courtesy of BMW OF NORTH AMERICA, INC.

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 .

Fig 6: Identifying Measuring Points On Brake Disc

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Check dust sleeve (1) for damage and replace if necessary.

Clean contact face (2) of brake piston and apply a thin coating of anti-squeak compound.

IMPORTANT: Dust sleeve must not come into contact with anti-squeak compound as this may cause the dust sleeve to swell.

Fig 7: Locating Brake Piston Dust Sleeve And Contact Face

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Clean mounting faces (1) and (2) of brake lining hammer heads/brake caliper housing and coat with anti-squeak compound.

NOTE: Grease contact surfaces on brake caliper at top and bottom.

Fig 8: Identifying Mounting Faces And Brake Lining Hammer Heads

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Clean mounting face (3) of brake caliper and apply a thin coating of anti-squeak compound.

Fig 9: View Of Mounting Face Of Brake Caliper

Courtesy of BMW OF NORTH AMERICA, INC.

Clean brake caliper holder at hammerhead guides and apply a thin coating of anti-squeak compound.

Refer to OPERATING FLUIDS - BRAKES .

Fig 10: Locating Hammerhead Guides

Courtesy of BMW OF NORTH AMERICA, INC.