I have a Campbell hausfield model WL611701AJ. I replaced the regulator and the pressure switch and now it only builds to 75 psi. Before I replaced the pressure switch it would build to 125 psi but wouldn't shut off. Now it only builds to 75 no matter how long I let it run. When I turn it off it will hold the 75 psi without any noticeable leaks. Please advise

Tony Benamati
Louisiana