Piston, FNR-G Caliper

Piston, FNR-G Caliper

Special tools, testers and auxiliary items required

• Trim Removal Wedge (3409)

• Piston Resetting Tool (T10145)

• Assembly Tool (T10146/1)

Removing

- Force the piston from the brake caliper using compressed air.

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






- Remove protective cap from the brake caliper with (3409).

- Remove seal with (3409).






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 G 052 150 A2 before inserting.

- Install sealing ring in brake caliper.






- Insert the protective cap - A - into the (T10146/1) - 1 -.






- Press the protective cap with the assembly tool - 1 - and the piston resetting tool - 2 - into the brake caliper so that it contacts the brake caliper all around.






Check seating of protective caps.

- Protective cap must no longer be able to be pulled from the brake caliper by hand.

- Lightly press the piston against the protective cap with an extension and ratchet adapter - 1 - and hold it there, in that position.






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

- Blow the protective cap on with pressurized air (max. 3 bar) - 2 -. Protective cap springs onto piston.

- Press piston with hand into brake caliper, possibly push back slightly with piston resetting tool.

Outer sealing lip of protective cap will then engage in piston groove.