34 11 552 Overhauling left or right front-brake caliper (brake caliper removed): Installation:

Only clean guide screws; do not grease. Check guide bolts, replace if necessary.

Tightening torque: Refer to 34 11 3AZ 34 11 FRONT BRAKE .

Dismantle brake caliper and remove brake linings.

Press brake lining fully outwards and insert spring (4).

Fig 1: Identifying Spring

WARNING: In the following work step, large forces occur at the brake caliper piston (up to more than 2800 N!). Danger of injury!

Press out piston with compressed air applied through connection bore.

To protect piston, place a protective plate (e.g. hard wood or hard felt) in caliper recess.

Do not grip piston with fingers - risk of trapping!

Fig 2: Pressing Out Piston With Compressed Air Applied Through Connection Bore

Check guide sleeves (5), fitting repair-kit guide sleeve if necessary.

Fig 3: Checking Guide Sleeves

Apply a light coat of Ate brake cylinder paste to cylinder bore, piston, dust sleeve and sealing sleeve.

Install sealing cover in rear annular groove of cylinder bore.

First fit dust sleeve on piston. Insert sealing bulge into front groove of cylinder bore and press in piston with a hardwood board.

CAUTION: Do not tilt piston.

Fig 1: Installing Sealing Cover In Rear Annular Groove Of Cylinder Bore