Front Brake Caliper Piston, PR- 1LL/FM0

Front Brake Caliper Piston, PR- 1LL/FM0

• The brake caliper is removed.

• Remove the brake caliper. Refer to => [ Brake Caliper ] Brake Caliper.

• Install complete repair kit when servicing.

• Apply thin coat of assembly paste to brake cylinders, pistons and seals. Allocation, refer to the Electronic Parts Catalog (ETKA).

Special tools, testers and auxiliary items required

• Disassembly wedge (VAS 3409)

• Assembly device for protective cap (T10146/5)

• Piston resetting tool (T10145)

• Assembly paste. Allocation, refer to the Electronic Parts Catalog (ETKA).

Removing

Remove the brake caliper. Refer to => [ Brake Caliper with Brake Carrier ] Brake Caliper With Brake Carrier.

- Force piston from brake caliper housing using compressed air.






- Pos.- 1 - (T10145)

• Place a wooden board into the recess of the caliper housing so it is not damaged.

- Remove protective cap from brake caliper, e.g. with (VAS 3409).






- Remove seal.






- Use (VAS 3409) - 2 - for this.

- Pos.- 1 - (T10145)

• When removing make sure that the surface of the cylinder is not damaged.

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 before inserting.

- Insert inner seal in brake caliper groove using (VAS 3409).

- Press in the protective cap using special tool - 1 - and - 2 -.






- Item - 1 - (T10146/5)

- Pos.- 2 - (T10145)

Use protective backings

- Press the protective cap onto the brake caliper housing so that it contacts the brake caliper housing all around - arrow -.






• Use protective backings.

- It should no longer be possible to remove the protective cap from the brake caliper housing by hand.






- Thinly coat piston and seal with Assembly Paste before inserting.

- Lift the brake piston, as shown, with commercially available extension and ratchet adapter and lightly press against the protective cap.






• Do not angle piston, to avoid damaging the seal sleeve.

- Blow the protective cap on with pressurized air (maximum 3 bar). The protective cap will thereby jump over the brake piston.

• Use protective backings.

- Press piston into the brake caliper housing by hand.






• The inner sealing lip of the protective cap thereby slips into the groove on the piston.

Install the brake caliper. Refer to => [ Brake Caliper with Brake Carrier ] Brake Caliper With Brake Carrier.