34 11 000 Removing and installing/replacing brake linings on both front disk brakes

WARNING: This page is about a different variant/trim than selected.

Necessary Preliminary Tasks:

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

IMPORTANT: After completing the tasks, press the brake pedal to the floor several times to ensure the brake pads are firmly pressed against the brake discs. If the brake pads are replaced simultaneously on the front and rear axles, the brake fluid level must be checked and if necessary the brake fluid topped up to the "MAX" marking.

Detach retaining spring (1).

Installation:

Attach retaining spring first at bottom and then at top.

Fig 1: Locating Retaining Spring

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Remove plastic plugs (2).

Fig 2: View Of Plastic Plugs

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Release guide screws (1) and pull brake caliper towards rear to remove.

Installation:

Only clean guide screws; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition. Tightening torque, (32-38 N.m.).

IMPORTANT: Tie up brake caliper to relieve strain on brake hose.

Fig 3: Locating Guide Screws

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Press piston fully back with special tool.

Fig 4: Aligning Brake Piston With Special Tool

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IMPORTANT: When pressing down piston, note brake fluid level in expansion tank. Overflowing brake fluid can attack the paintwork!

Remove outer brake pad. Inner brake lining is located with its spring in the piston.

Fig 5: Removing Outer Brake Pad

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IMPORTANT: Mark any worn brake linings. In the event of one-sided brake lining wear, do not change brake linings round. New brake linings may only be installed if the measured brake disk thickness is greater than or equal to the minimum brake disk thickness (MIN TH). Clean brake linings. Do not grease backs of brake linings sleeve.

Check dust sleeve (1) for damage and replace if necessary. Clean contact faces (2) of brake piston and apply a thin coating of anti-squeak compound.

IMPORTANT: The dust sleeve must not come into contact with antisqueak compound as this would cause the dust sleeve to swell.

Fig 6: View Of Dust Sleeve

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

Fig 7: Identifying Brake Lining Hammer Heads Contact Faces

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

Fig 8: View Of Brake Caliper Contact Faces

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Clean hammer head guides at brake caliper mounting bracket and apply a thin coating of anti-squeak compound.

Fig 9: Locating Brake Caliper Mounting Bracket Hammer Head Guides

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