Hi. I have an old Huntsman which I am trying to charge.
I have tried to put 3000 psi into it, but no joy.
I think the filler valve may be stuck as I have not charged it for 30 odd years.
I can not find any diagrams showing the valve body and it's parts, so as to get an idea of how it works.
The valve body is tight in the main air cylinder.
If anyone knows how this charging valve works, please let me know.

Any help or advise gratefully received.

Dave