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 |
| q | With engine switched off, depress brake pedal firmly several times (to exhaust the vacuum in the unit) |
| q | 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 |
| q | Non-return valve (in vacuum hose) → Anchor |
| Functional check → Anchor |
| q | Separating from brake pedal → Chapter |
| q | Removing and installing → Chapter |
| 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 | Cannot be repaired. If faulty, renew complete |
| 7 - | Self-locking hexagon nut, 20 Nm |
| 8 - | Heat shield |
| q | Allocation → Electronic Parts Catalogue (ETKA) |
| 9 - | Self-locking hexagon nut, 20 Nm |
| 10 - | Seal |
| q | Renew |
| 11 - | Sealing plug |
| 12 - | Vacuum hose |
| q | Insert into brake servo unit |
| 13 - | Seal |
| q | For brake servo |
| 14 - | Self-locking hexagon nut, 20 Nm |
| 15 - | Boot |
| q | Ensure it is seated correctly, danger of suction noises |