HPA not working in 98C

Alright, Im kind of desperate here, as a friend of mine is selling me his HPA tank, and hes not the kind of guy, but hes actually letting me test his hpa on my gun before i shell out the big bucks, so Im trying to take advantage.

When I screw his perfectly fine almost brand new (68/4500 Crossfire HP) into my gun, I get nothing but a loud SHHH sound of the dearly departed compressed air that I payed for leaking EVERYWHERE. I lost 1000 psi in 7 seconds. Now I have 2000 psi left, and the place to fill it is far away, so Im not 'screwing' around now. HAHA! ...

Im guessing the problem would be the tank adapter. I need to oil up my co2 tank threads every other use in order for it to not leak (dont worry, I wont oil the hpa), so maybe I have a crap tank adapter. But then it seems that the hpa tank just wont screw in all of the way, and it does have a lot more threads than my co2 tank. I have a very very old 98 Custom version, so maybe my tank adapter isnt made for new nitro tanks.

Really, I just want to test out hpa, though IF I get the hpa, Ill get a drop, but I dont want to shell out money I do not have to, to just TEST hpa on my gun. So does anybody know a solution? Is my tank adapter too old? Im kind of screwed on this, as the dude is going to want his tank back soon, or "I bought it."


And yes I searched like a madman, quiet yourself.


Edited by TheWarHam - 28 October 2007 at 5:49pm

I guess that scratches that one out. Thanks for replying... I dont know, it just wont seem to go in all the way... The threads look fine, but not the best condition. I guess maybe a small chip is screwing the whole game up.

Well, if anyone has anymore ideas that would be great, and I would also ask, would get a Smart Parts (AHHH!!) on/off Here maybe help, as I would be using a different set of threads to screw the tank into? I thought itd be good because even if I dont like nitro, I could use it for co2. I dont know, im clueless as to what to do.

I guess my last solution would be to go to the shop and ask them, but its far and theyre a bunch of idiots.


Edited by TheWarHam - 28 October 2007 at 6:04pm

I did, its fine though.

Check the whole threaded part of the HPA tank. Look in your ASA for any thing bad.

the threads look fine in the pic. I'm betting you'll find it's the asa. If the asa is screwed up I would advise not forcing the tank onto it again for fear of really ruining the tank threads. 

I have not heard of 1 single paintball tank that does not work with the threads of the 98c so I don't think that is a concern. 

If you shell out some cash for a drop with an asa consider looking into an asa with an on/off built in. It will make putting the tank on the marker a whole lot easier and taking it off is a dream too.

Good luck with your soon to be purchases.

probably just a sheared o-ring. even minute cracks/cuts in it will cause a leak. Especially if your ASA threads are out of whack, they can cut the o-ring on the tank.

take it to a shop!

Empty the tank of all air. Using a box-wrench of the appropriate size, remove the burst disk and replace with a unified disk that has the rubber washer at the bottom. Make sure to use enough pressure to get the washer and disk to seat properly, but not so much that you over-torque the sucker and strip the head.

For the gauge, you will need an open-ended wrench of the appropriate size. Remove the gauge (again, no air in the tank) lightly wrap the threads of the gauge (once they have been cleaned with a wire brush or dental pick of residue) with teflon tape in a clockwise motion as you are looking at the back of the gauge face. This will keep the teflon tape from unraveling as you screw it back in. Now, again, using enough torque to tighten the gauge properly but not over-stress it and cause it to strip, screw the gauge back in. When satisfied that everything is in properly and tight, fill the tank slowly with HPA/N2 and check for leaks with the soap and water test.