Turn the second stage adjustment screw completely out counter-clockwise, and set the venturi lever to the "MIN" position (see Fig. X).
Connect the first stage to a filtered air source of 3,000 psi.
Turn the second stage adjustment screw exactly one full turn (360º) clockwise. 5. Slowly open the air supply valve to fully pressurize the regulator.
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When no airflow can be heard after the regulator has been pressurized, slowly depress the purge button to verify whether a strong airflow can be initiated when the button has traveled no more than 2mm
Depress the purge button sharply several times to ensure that leakage or freeflow does not occur.
Move the venturi lever to the "MAX" position and depress the purge button sharply. This should initiate a strong, continuous freeflow that can be eliminated by turning the venturi lever back to the "MIN" position.
To test the setting of the seat crown, turn the second stage adjustment screw completely out counter-clockwise to initiate a slight flow of air, and then slowly turn it back in clockwise to verify that the airflow has stopped completely before it has been turned 1 full turn. If more than 1 turn is required to shut off the airflow.....