| 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- |
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| 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 bleeder screw on one of the front brake calipers. |
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| Connect the brake system tester e.g. - V.A.G 1310 A- to the brake caliper and bleed. |
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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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| Separate brake system tester e.g. - V.A.G 1310 A-. |
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| Screw the bleeder screw into the brake caliper and bleed the brake caliper. |
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