FBC brake caliper repair (Audi A4 B8)

Brake repair. fBC calipers

1. Bolt: 30 Nm.
2. Sealing cuff: insert into the brake. support.
3. Guide pin: slide through the cuff.
4. Protective cap: placed on the bleed nipple.
5. Bleed nipple (air bleed valve): Before tightening, lubricate the threads with a small amount of paste -G 052 150 A2-; 15 Nm.
6. Brake caliper.
7. Spring: Ensure correct installation. position.
8. Sealing cuff: do not damage when installing the piston; apply mounting paste -G 052 150 A2-.
9. Piston: pre-lubricate the piston with a thin layer of mounting paste -G 052 150 A2-, diameter 57 mm.
10. Sealing ring: apply mounting paste -G 052 150 A2-.
11. Brake caliper: loosen the 4 brake caliper mounting fasteners. brake pads. the bracket is not allowed.
12. Bolt: 196 Nm.

Removal

Press the piston out of the brake housing. calipers using compressed air. To prevent damage to the piston, install a wooden stop.

Remove the seal. ring. Use wedge "3409" for this.

Installation

Piston and seal surfaces. clean the rings only with alcohol, after cleaning let the alcohol evaporate. Before installation, apply a thin layer of mounting paste -G 052 150 A2- to the piston and cuff. Insert the inner seal. ring into the "arrow" groove of the brake caliper.

Insert the seal. cuff so that it fits snugly against the caliper body around its entire circumference. Once pressed in, the seal must not be adjusted. cuff, removing it with your hands from the brake housing. caliper. Before installation, apply a thin layer of mounting paste -G 052 150 A2- to the piston and cuff. Lightly press the piston through the seal. cuff. To avoid damaging the seal. the cuff and piston must be installed without tilting. Using compressed air (maximum pressure 3 bar) push out the outer part of the edge of the sealing cuff. The outer part of the sealing cuff edge will then be outside the piston.

Press the piston into the brake. support using the "T10145" device. To avoid damaging the seal. the cuff and piston must be installed without tilting. The inner part of the edge of the sealing cuff will then enter the groove of the piston.