[itsme123]

I know the gti is an elcectric gun, but i need help. My friend gave me his piranha gti to fix a leak in. The leek is coming out of the barrel. I have replaced an print, taken apart his whole gun, inspected it, cleaned it, and lubed it and I cant figure out the problem.

[Myrkul]

It's either your cupseal is shot, or the valve seat has a scratch. replace the cup seal first, it should be interchangeable with spyder cup seals. If that doesn't work replace the valve "o" rings just in case. if the problem still persist then get a new valve body.

[itsme123]

I already replaced the cup seal and it didn't help

[Myrkul]

itsme123, on 11 February 2012 - 02:21 PM, said:

I already replaced the cup seal and it didn't help

Then replace the valve "o" rings. If that doesn't work replace the valve body because the valve seat is scratched.

[Danny D]

Myrkul, on 11 February 2012 - 02:56 PM, said:

itsme123, on 11 February 2012 - 02:21 PM, said:

I already replaced the cup seal and it didn't help

Then replace the valve "o" rings. If that doesn't work replace the valve body because the valve seat is scratched.

Try to cock the marker before airing up, and fire a couple times to reseat the seal.

What air source are you using? If i remember correctly the gti takes stright unregulated air. So make sure your co-2 tank is filled up, or the hpa tank is not a slp reg. If your frieend put a reg on the marker take it off.

Myrkul has other great points. Replace the front valve o-ring that is nearest to the cup seal. If you replaced the cup seal and did all the above (as well as clean with qtips), you may want to take a file to the valve seat and grind it flat taking out any scratches or nicks present. Ive done that to some worn nelson valves and autocockers with great results.

This post has been edited by Danny D: 11 February 2012 - 06:07 PM

[itsme123]

Well I am not sure about some of the stuff you said because I am not as familiar with piranha guns.

[Myrkul]

itsme123, on 11 February 2012 - 11:08 PM, said:

Well I am not sure about some of the stuff you said because I am not as familiar with piranha guns.

Umm... Not sure how to say this but the valve system is essentially the same (there are different spring combos and dimensions)as on every poppet valve gun in existence. There is nothing specific to piranha's here. Maybe if you could be a little more specific on exactly what you don't understand, we could help more.

[itsme123]

Well I am used to working with tippmanns and know lots about them, but tippmanns and kingman guns are totally different. I know stuff about the kingmans, but not a whole lot.

[Myrkul]

itsme123, on 12 February 2012 - 10:23 AM, said:

Well I am used to working with tippmanns and know lots about them, but tippmanns and kingman guns are totally different. I know stuff about the kingmans, but not a whole lot.

Tippmanns and Kingman are both poppet valved. The only real difference is inline verse stack tube. Kingmans are identical to piranha, most of the parts are interchangeable. On Tippmanns the cup seal rest up against a brass plate called a valve seat inside the valve assembly. On stacked tube blow backs (STBB)the gun body contains the valve assemble, and the cup seal rest up against the valve body. Where tippmanns use a small brass plate and an "o" ring as the valve seat, STBBs just use one solid piece. STBBs are actually easier to understand because there are fewer parts. hopefully this helps.

[itsme123]

that really helps. I have also always wondered how paintball guns work. Where did you find this?<br>

[Myrkul]

http://www.zdspb.com...animations.html

[slinkyaroo]

The main reason it may be leaking is that you put the centering ring (ninja star) behind the poppit.

It goes spring > ring > poppit > marker.

[itsme123]

No it's on right. I have been watching that diagram thing and I don't know what else would be wrong.