I have a wellsaver water tank that will not cut off on its own. The pressure will not pump up past 40lbs pressure. The pressure in the pressure tank is 32lbs. How can I fix the problem

I'm a little confused. Are you saying the pump will pump up to 40 PSI but will keep on running without adding more pressure? What are the limits on your control box? Your bladder tank pressure should be set at 2 PSI under the cut in point on your control box when the pumps's off and the pressure in the system's bled off. Let me know. Regards, Tom