Remove retaining washer (1).
Drive the retaining pin (2) out towards the wheel side.
Remove brake pads.
Close the bleed screw.
Tightening torque: Bleed screw in brake caliper — 6 Nm
Hold a cloth over the brake caliper piston.
Carefully press out brake piston (3) with a compressed air gun applied to the connecting bore; work at low air pressure.
Caution! Keep fingers away from gap between piston and side contact face of brake pads; risk of injury.
Remove sealing rings (4) from left and right bores.
Inspect the brake caliper piston for hairline cracks, score-marks and other damage.
Coat the new sealing rings with brake fluid and insert them into the left and right brake caliper bores.
Caution! Keep the brake pistons parallel with their bores when installing.
Coat both brake caliper pistons with brake fluid and install them.
Coat the adapter plate locating pins with Shell Retinax A and install the adapter plate.
Insert locating plate (5) into brake caliper.
Note: The installed position must be correct (arrow pointing in forward-travel direction).
Insert brake pads and secure with retainers.