C54 Brake Caliper

C54 brake caliper, servicing

Notes:
^ When carrying out repairs install all parts supplied in repair kit.
^ New brake calipers are filled with brake fluid and are prebled.
^ Apply thin coat of installing paste G 052 150 A2 to brake cylinders, pistons and seals.





1 - Dust cap
2 - Bleed valve
^ Apply thin coat of assembly paste G 052 150 A2 to threads before screwing in
3 - Selflocking hex bolt, 35 Nm
^ Always replace
^ When loosening and tightening counter hold on guide pin
4 - Guide pin
5 - Protective cap
^ Pull onto brake carrier and guide pin
6 - Brake carrier with guide pin and protective cap
^ Supplied as assembled replacement part, with sufficient grease on guide pins
^ If protective caps or guide pins are damaged, install repair kit. Use grease packet supplied to lubricate guide pins
7 - Protective seal
^ Do not damage when installing piston
8 - Piston
^ Apply thin coat of paste G 052 1 50 A2 to piston before installing
9 - Seal
10 - Brake caliper housing

Front caliper piston, removing and installing
Special tools and workshop equipment required





^ 3409 Wedge
^ Piston resetting tool

Removing





^ Force piston out of brake caliper housing using compressed air.

Note: Place a wooden board into the recess of the caliper housing to prevent damaging the piston.





^ Remove seal using 3409 wedge.

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

Installing
^ Use only appropriate solvent to clean surfaces of the piston and seal, then dried.
^ Apply a thinly coat of paste G 052 150 A2 to piston and seal before installing.
^ Install oil seal in brake caliper housing.





^ Place protective seal with the outer sealing lip on the piston.





^ Using 3409 wedge, insert the inner sealing lip into the cylinder grove.

Note: Hold piston in front of caliper housing.





^ Press piston into the brake caliper housing using piston resetting tool.

Note: The sealing lip of protective outer seal will then engage in the piston groove.