Air Leakage Rate Test

  • Turn ignition key to on position
  • Release Parking Brake
  • Apply and hold Service Brake
  • Allow pressure gauges to stabilize
  • Continue to hold Service Brake for one minute
  • Pressure should not drop more than 3 psi.
  • Release Service Brake

“Next I will make sure there is no excessing air leakage. This is done by releasing the Parking Brake and applying the Service Brake, which is held throughout the test. After an initial loss of air the gauges will stabilize. This is when I will begin to time for one minute. There can be no more than three (3) psi lost.”
{release service brake}