Yesterday I could not pump my AA200T tank past 150 bar no matter how long I pumped. It is a few years old but has been used very little. The Hill troubleshooting guide speaks of a problem with the handle going back down on its own, but I have the opposite situation. My pump handle is rising on its own, and with considerable pressure. This begins very soon while pumping but I still get air in the tank if I pump long enough, but at 150 the tank simply does not receive any air. I cannot see any obstruction in the tank intake or the pump valve. Any ideas?
