| Checking the master brake cylinder for tightness |
| Special tools and workshop equipment required |
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| Brake system tester e. g. -V.A.G 1310 A- |
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| Adapter M 10 e.g. -V.A.G 1310/6- |
| The function and tightness of the brake system (brake lines, brake hoses, brake calipers, hydraulic unit) are O.K. |
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| Release the vent valve on one of the front brake calipers. Connect and bleed brake system tester e. g. -V.A.G 1310 A- |
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| Push down brake pedal until the pressure gauge indicates 5 MPa (50 bar). Throughout the test which lasts (45 s) the pressure loss must not exceed 0.4 MPa (4 bar). In case of high pressure loss replace the master brake cylinder. |
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