Volkswagen Golf Service & Repair Manual: Testing for leaks

Volkswagen Golf Service & Repair Manual / Brake system / Brakes, hydraulics, regulator, servo / Hydraulic system / Testing for leaks

Special tools and workshop equipment required

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

Adapter M10 -V.A.G 1310/6-

Test prerequisites:

Brake system (hydraulic unit, brake hoses, brake lines and brake calipers) operating properly and free of leaks.

Carry out the following work:

Checking

–	Remove bleeder valve at one of front brake calipers.

–	Connect pressure gauge -V.A.G 1310 A- 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.

Testing for leaks

Subsequent bleeding of hydraulic system

Note Carry out subsequent bleeding when: brake pedal travel is too long or so-called »soft brake pedal« ...

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