Pressurised leak test

Special tools and workshop equipment required

• Tester for brake pressure regulator - V.A.G 1310 A-

• Adapter M10 - V.A.G 1310/6-

3.1 Test prerequisites:

Brake system ( ABS hydraulic unit - N55-, brake hoses, brake lines and brake calipers) is working properly and is not leaking.

• Remove bleeder valve at one of front brake calipers. Connect brake system tester - V.A.G 1310A- with corresponding adapter and bleed.
• Apply pressure to brake pedal until gauge indicates a pressure of 50 bar. The pressure must not drop by more than 4 bar within the test period of 45 seconds. Renew brake master cylinder if drop in pressure exceeds specification.