Well I've done ALL the above with my Vectis,I posted on another thread about this problem as well,the valve pin is the only thing I haven't replaced yet and quite frankly I'm getting tired of this.
Hatsan customer support team won't answer, can't just order parts individually on their site. Otherwise I would order the pin,it COULD be the pin that doesn't seat properly,it has an EVER SO SLIGHT wobble when I chuck it up in a drill doesn't seem that bad,but we are dealing with high pressure air so it could be my issue,but if it's not then I've wasted time and money.
Had the idea that maybe the spring is sprung but I'm a newbie at this,I want to just order the valve ALL new and be done with it but Hatsan isn't responding to me,and frankly if I order a new one without figuring out why mine failed then I could have same problem again.
As I said before I did all the suggestions and replaced the seals it leaks right out of the transfer port hole NOT at the tip where the pin sticks out.
So if it's sealed fine from the fill port through the tube then leaks from the transfer port how is the seals in FRONT of the transfer port related to air coming out behind it?
I'm basing that last question on the exploded view of the parts.
As ALWAYS any help is appreciated,Thanks