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The cut-out pressure should be in accordance with the pressure setting of the piece number being used. (Common cut-out pressures are between 105-125 psi.) With the engine still running, make a series of brake applications to reduce the air pressure and observe at what pressure the governor cuts-in the compressor.
The pressure at the valve at the top of the tank should be set 2 pounds below the cut in point. So, in your case, with your pump cutting in at 36, the pressure at the top of the tank should be 34. Cutting off at 64 is about as high as you would want to go. Most switches, I believe, come preset at 20/40.