Rear Brake Caliper Piston

Rear Brake Caliper Piston

Special tools, testers and auxiliary items required

• Trim Removal Wedge (3409)

Removing

- Rotate the spindle in the direction of - arrow - with an 8 mm socket.





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 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 the 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.