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Home >> Chrysler >> 2021 >> Voyager LX, Gas >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Base Brakes (Service Information) >> Hydraulic/Mechanical >> Master Cylinder, Brake >> Diagnosis And Testing >> Diagnosis And Testing - Master Cylinder/Power Booster >> Power Booster Check Valve Test

Power Booster Check Valve Test

  1. Remove the power booster check valve from the power booster.
  2. Using a hand operated vacuum pump, apply 508-677 millibars (15-20 in HG) vacuum at the booster side of the check valve.
  3. The vacuum should hold steady. If the gauge on the pump indicates vacuum loss, the check valve is faulty and should be replaced.
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