Originally Posted by b-cuzz
There's an o-ring inside the power tube. You can take the brass tube tip off with a nickel to get at it. There's one on the tip itself (which usually doesn't cause a problem), and then there's one deep inside just sitting there. You can take it out with your smallest allen wrench.
i have replaced all those orings.....and the spring, and now the tip and its oring ... still loosin alotta air ... 8(