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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 339 (Base Brakes (Service Information) - 2500 Hd & 3500 Hd) >> Hydraulic/Mechanical >> Booster, Power Brake >> Diagnosis And Testing >> Diagnosis And Testing - Master Cylinder/Power Booster >> Power Booster Check Valve Test

Power Booster Check Valve Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the power booster check valve from the power booster.
  2. Using a hand operated vacuum pump, apply 15-20 inches HG (508-677 millibars) 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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