Golf Mk4
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1 - | Brake servo |
q | On petrol engines the vacuum required is taken from the intake manifold |
q | On diesel engines an vacuum pump is installed to create the required vacuum |
q | Functional check: |
– | With engine switched off, depress brake pedal firmly several times (to exhaust the vacuum in the unit) |
– | Now depress brake pedal with average foot pressure, hold and start engine If the servo unit is working properly, the pedal will give slightly under foot (servo assistance becomes activated) |
q | If faulty renew complete (check all vacuum lines first) |
q | Non-return valve (in vacuum hose) → Anchor |
q | Separating from brake pedal → Chapter |
q | Removing and installing → Chapter |
q | Some vehicles additionally have an electrical vacuum pump -V192- |
q | Functional check → Chapter |
q | Removing and installing → Chapter |
q | Allocation → Electronic Parts Catalogue (ETKA) |
q | Brake assist system in brake servo |
q | Functional check → Chapter |
q | Allocation → Electronic Parts Catalogue (ETKA) |
2 - | Cap |
3 - | Brake fluid reservoir |
4 - | Sealing plug |
q | Coating with brake fluid and pressing into brake master cylinder |
5 - | Retaining pin |
q | Insert through brake master cylinder |
6 - | Brake master cylinder |
q | Must not be repaired. If faulty, renew complete |
7 - | Retaining plate |
q | Used to secure the wiring harness |
8 - | Self-locking hexagon nut, 20 Nm |
9 - | Heat shield |
q | Allocation → Electronic Parts Catalogue (ETKA) |
10 - | Brake pressure sender -G201 -1- |
q | Removing and installing → Chapter |
11 - | Seal |
q | Renew |
12 - | Sealing plug |
q | Connection for vacuum hose |
q | Insert into brake servo unit |
13 - | Seal |
q | For brake servo |
14 - | Self-locking hexagon nut, 20 Nm |