Removing and installing brake caliper piston FN 3 — AUDI

🧭 Before you start

Fits: VW Caddy III (2K, 2004–2015); platform code 2C0

• Special tools named: 3409, T10146/6

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• The surfaces of the piston and seal must be cleaned only with methylated spirits and then dried.
• Keep piston straight to prevent damage to sealing collar.

📋 Procedure

1. Press piston out of brake caliper using compressed air.
2. Lever off protective cap from brake caliper using wedge 3409.
3. Remove seal using wedge 3409.
4. The surfaces of the piston and seal must be cleaned only with methylated spirits and then dried.
5. Apply a thin coat of assembly paste G 052 150 A2 to piston and seal before inserting.

6. Insert seal into brake caliper.
7. Fit protective seal (A) in assembly tool T10146/6 (1).
8. Press protective cap onto brake caliper so that it is fitted correctly all round using assembly tool (1) and piston resetting tool (2).
9. At this stage, it should not be possible to remove protective cap from brake caliper by hand.
10. Press piston lightly onto protective seal and lock it in this position with, for example, an assembly wedge (2). [Note: Keep piston straight to prevent damage to sealing collar.]
11. Blow into protective cap using compressed air (max 3 bar) (1). The protective cap then springs onto piston.
12. Press piston into brake caliper using piston resetting appliance (1).

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