My VT623201 only gets to 95 pounds. I replaced the pressure switch assembly with a new style replacement assembly and the problem is still there. I cannot find any leaks. It does not use any oil. The moisture buildup in the tank is not excessive. It used to go to about 110 pounds and then switch off until the pressure dropped to about 90 pounds and switch back on.
(This topic is covered extensively in the troubleshooting section - Moderator)