Tigershark leaking again.....tried everything

[camoman5000]

Ok, my Tigershark is leaking down the barrel again. I still get lots of shots off of a 12 gram, but that constant hissing type sound is getting annoying. I took it apart, and I replaced the bolt o-ring and oiled everything. Next I figured I would replace the cup seal, but I take it apart, and it turns out its this funky brass/plastic type seal, which the power tube screws into, therefore I can't use standard cup seals on it. I oiled everything, and tightened everything really tight. What the hell could be wrong with it, because I am out of ideas on whats going on.:confused:

[Headhunter]

Tried replacing any springs? I'm not familar with the TigerShark break down so bear with me. Try not making the air feed tube so tight. Honestly, I don't know:confused:

[isaiah]

it's a nelson-based pump, see if you can find a nelson diagram somewhere.

leaking down the barrel means either cup seal or valve cap o-ring.

check for dirt on the cup seal. check for a scratch on the cup seal. check for dirt or a scratch on the metal lip where the cup seal sits.

check for nicks on the valve cap o-ring. check for gouges or scratches on the metal where the o-ring seals against.

if it leaks when it's cocked, then it's not a spring problem.

[jrose152]

take out the valve and put it back in