34 21 200 Removing and installing or replacing brake pads on both rear disc brakes (Teves floating caliper)

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

Special tools required:

34 1 050
34 1 280

IMPORTANT: The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor loses its retention capability in the brake pad).

Necessary preliminary tasks:

Remove Wheels
Remove Rear Brake Pad Wear Sensor

Lift out retaining spring (1).

Fig 1: Identifying Brake Pad Retaining Spring

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Remove cover plug (1).

Pull brake pad wear sensor out of brake pad (right side only).

Fig 2: Identifying Brake Pad Cover Plug

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Unscrew guide bolts (1).

Remove brake caliper (2) by pulling forward.

Installation:

For tightening torque refer to 34 21 4AZ in 34 21 REAR BRAKE .

Clean guide screws only; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.

IMPORTANT: Tie brake caliper back and do not allow to hang from brake hose.

Fig 3: Identifying Guide Bolts And Brake Caliper

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Remove outer brake pad.

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

IMPORTANT: Mark any worn brake pads.

In the event of one-sided brake pad wear, do not change brake pads round.

Clean brake pads.

Do not grease backs of brake pads sleeve.

Fig 4: Removing Outer Brake Pad

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Turn piston fully back with special tool 34 1 050.

IMPORTANT: When pressing down piston, note brake fluid level in expansion tank.

Overflowing brake fluid will damage the paintwork.

Fig 5: Identifying Special Tool (34 1 050)

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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.

New brake pads may only be installed if the brake disc thickness is greater than or equal to the Minimum Brake Disc Thickness (MIN TH)..

Fig 6: Identifying Special Tool (34 1 280) And Measuring Points

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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 antisqueak compound as this may cause the dust sleeve to swell.

Fig 7: Identifying Brake Caliper Dust Sleeve And Contact Face

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

Fig 8: Identifying Brake Caliper Contact Faces

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

Fig 9: Identifying Brake Caliper Contact Face

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

Fig 10: Identifying Brake Caliper Mounting Bracket

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NOTE: After completing work:

When replacing linings, reset CBS display in accordance with factory specification.
Fully depress brake pedal several times so that brake pads contact brake discs.
When installing new brake pads at front and rear axles, brake fluid level must be brought up to "MAX" marking.
Read and comply with Notes On Braking In New Brake Discs / Brake Pads.