FN 3 Front Brake Calipers

Front brake calipers

Notes:
^ Install all parts supplied in the repair kit.
^ New brake calipers are filled with brake fluid and are pre-bled.
^ Apply a thin coat of lubricant, Part No. G 052 150A2 to brake cylinders, pistons and seals.





1 Dust cap
2 Bleeder valve
^ Apply thin coat of assembly lubricant G 052 1 50 A2 to threads before installing
3 Cap
^ Insert in mounting bushing
4 Guide pin, 28 Nm (21 ft. lbs.)
5 Mounting bushing
^ Insert into brake caliper housing
6 Brake caliper housing
7 Brake carrier
8 Retaining spring
^ Insert with both ends in holes in brake caliper housing
9 Piston seal
10 Piston
^ Apply thin coat of assembly lubricant G 052 1 50 A2 to piston before installing
Piston diameter: 54 mm (2. 125 inch)
11 Protective seal
^ Do not damage when inserting piston

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





^ 3409 Wedge





^ VAG 1331 Torque wrench or equivalent
^ Piston resetting tool

Removing





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

Note: Place a piece of wood in the recess to prevent damaging the piston.





^ Remove seal using wedge 3409.

Note: When removing the piston seal make sure that the cylinder bore is not damaged.

Installing
^ Thinly coat piston and piston seal with assembly lubricant G 052 150 A2 before inserting.





^ Place protective seal with outer sealing lip on piston.





^ Hold piston in front of caliper and insert inner sealing lip into groove in cylinder using wedge 3409.





^ Press piston into brake caliper housing using piston resetting tool.
- The protective seal outer sealing lip must slip into the piston groove.