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Home >> Audi >> 2015 >> A4 Prestige >> Repair and Diagnosis >> External Pages >> Different car >> Section 539 (Brake System - Hydraulic Components (Sedan) (As Of 09.2011)) >> 47 Hydraulic Components >> Diagnosis And Testing >> Check Valve, Checking

Check Valve, Checking

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Valve must allow air to flow in direction of arrow.

Valve must remain closed in opposite direction.

Observe correct installation position.

the arrow points to the vacuum pump.