Removing and installing brake caliper piston, brake caliper FN 3 — VW

🧭 Before you start

Fits: VW Polo 6C (2014–2017)

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• The surfaces of the piston and seal must be cleaned only with methylated spirits and then dried.

📋 Procedure

1. Press piston out of brake caliper using compressed air.
2. Lever off protective cap from brake caliper using removal wedge3409.
3. Remove seal using removal wedge3409.
4. The surfaces of the piston and seal must be cleaned only with methylated spirits and then dried.
5. Apply a thin coat of lithium greaseG 052 150 A2 to piston and seal before inserting.

6. Insert seal into brake caliper.
7. Insert protective cap (A) in assembly tool T10146/6(1).
8. Push protective cap onto brake caliper using assembly tool T10146/6(1) and piston resetting appliance T10145(2) in such a way that protective cap lies against brake caliper all round its circumference.
9. It should not be possible to remove protective cap from brake caliper by hand.
10. Press piston lightly onto protective cap, and lock it in this position using removal wedge3409(2), for example.
11. Install 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 tool T10145(1).

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