Rear Brake Caliper Piston

Rear Brake Caliper Piston

Trim Removal Wedge (3409)

Removing

- Rotate the spindle - arrow movement - using a TORX(R) insert T45.






The pressure nut presses the piston out of the brake caliper.

- Remove the piston with the protective boot from the brake caliper.

- Remove seal with (3409).






Installing

- The surface of the piston and seal must only be cleaned with mineral spirits and then dried.

- Thinly coat the piston and seal with assembly paste G 052 150 A2 before inserting.

- Insert oil seal into brake caliper.

- Place protective cap with outer sealing lip on piston.






- Screw the pressure nut so far onto the spindle until dimension - a - 15 mm has been achieved.






- Using the (3409) , insert the inner sealing lip of the protective boot into the groove - arrows - in the brake caliper.






- Push the piston onto the pressure nut, which is only possible in four positions.

- Carefully press the piston into the brake caliper, moving the piston while doing this.

- Only press the piston so far into the brake caliper until it contacts the pressure nut.






- Carefully turn the spindle clockwise until the pressure nut is at the stop.






- Make sure that the protective cap is seated against the brake caliper - arrows - all around.






- Press the piston into the brake caliper by hand.






The outer sealing lip thereby slips into the groove on the piston.

Brake Caliper, Pre-Bleeding

- Open the bleeder valve - arrow A - and using a standard bleeder bottle, fill with brake fluid until brake fluid with no bubbles flows from the threaded hole (brake hose connection) - arrow B -. Close the bleed valve.






Position the brake caliper as shown during pre-bleed procedure.