CHECK VALVE INSPECTION [MZR 1.6]

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1.  Remove the check valve. (See CHECK VALVE REMOVAL/INSTALLATION [MZR 1.6].)

2.  Verify that there is no airflow when positive pressure is applied to port A.

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•  If there is airflow, replace the check valve. (See CHECK VALVE REMOVAL/INSTALLATION [MZR 1.6].)

3.  Verify that there is no airflow when negative pressure is applied to port A.

•  If there is no airflow, replace the check valve. (See CHECK VALVE REMOVAL/INSTALLATION [MZR 1.6].)