Brake systems · Brakes – mechanism · Repairing front brakes

Repairing front brakes, FN 3 brake caliper

1 Torx bolts, 12 Nm
2 Brake disc
- Allocation ⇒ Electronic parts catalogue “ETKA”
- Internally ventilated
- FN3 (15”) ∅ 288 mm, FN3 (16”) ∅ 310 mm
- Thickness: 25 mm
- Wear limit: 22 mm.
- Always renew on both sides of an axle.
- Unscrew brake caliper prior to removing.
- Never remove brake discs from wheel hub by force. If necessary use penetrating fluid, because otherwise brake discs can be damaged.
3 Torx bolt, 4.5 Nm
4 Brake pads
- Thickness: 14 mm not including backplate.
- Wear limit: 2 mm not including backplate.
- Checking thickness ⇒ Maintenance; Booklet; Front and rear brake pads/linings: Checking thickness.
- Always renew on both sides of an axle.
- Removing and installing ⇒ 1.5 Removing and installing brake pads, brake caliper FN 3.
5 Retaining spring
- Insert into both holes in brake caliper.
6 Brake carrier
- Bolt to wheel bearing housing.
7 Brake caliper
- Do not disconnect brake hose when changing pads.
- Removing and installing ⇒ 1.6 Removing and installing brake caliper FN 3.
- Repairing ⇒ 1.3 Repairing FN 3 brake calipers.
8 Guide pin, 30 Nm
9 Cover cap
- Remove
10 Brake hose with banjo union and banjo bolt, 35 Nm
11 Guide pin, 30 Nm
12 Cover cap
- Remove
13 Bolt
14 Bracket
15 Ribbed bolt, 124 Nm
- Clean if reused.
16 Wheel bearing housing
- With bolted-on brake carrier.
17 ABS speed sensor
- Before inserting sensor, clean hole inner surface and coat with high-temperature paste G 052 112 A3.
18 Hexagon socket head bolt, 8 Nm
19 Wheel bearing/hub unit
- ABS sensor ring is installed in wheel bearing.
20 Cover
- Allocation ⇒ Electronic Parts Catalogue “ETKA”.