Rear Brake Caliper Piston

Rear Brake Caliper Piston

Special tools, testers and auxiliary items required

• Resetting and extracting tool (T10165)

• Piston resetting tool (T10145)

• Disassembly wedge (3409)

Removing

- Remove piston from brake caliper by turning knurled wheel toward left.

Insert piston compressing and extracting tool so collar makes contact on piston.





• For pistons that are difficult to move, an open-end wrench (size 13 mm) can be applied at the appropriate wrench surface - arrow A -.

- Remove seal using (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.

- Place protective cap with outer sealing lip on piston.





- Using (3409), insert inner sealing lip into cylinder groove.





Hold piston in front of brake caliper for this procedure.

- Install the piston by turning knurled wheel toward right.





- To screw in, use (T10165/1) as an aid.

• Insert piston compressing and extracting tool so collar makes contact on brake caliper.

• When piston is misadjusted using a (T10145) or if foot brake is operated, the automatic reset function of the brake caliper is compromised.