Remove the pressure regulator plasic cover (usually one screw) and there will be 2 adjustment screws. One is for "cut-in" pressure (to start the compressor when the pressure drops below the set point), the other is for "cut-out" (to stop the compressor once that set point has been reached.
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By letting air out.
Remove the pressure regulator plasic cover (usually one screw) and there will be 2 adjustment screws. One is for "cut-in" pressure (to start the compressor when the pressure drops below the set point), the other is for "cut-out" (to stop the compressor once that set point has been reached.