Regulator o-rings
OK, so I have a creeping regulator on my newish (1000 shots in the month I’ve had it).25 bullpup. If I let the gun sit for about 5 minutes, my velocity will jump up about 20 fps then settle back down if I shoot without waiting. I am hoping it is an o-ring and not the seat.
Can anyone tell me which of the o-rings in the sticky at the top of the list are for the regulator? I want to replace the large outer rings as well as the small inner rings, although if it is an o-ring, it’s going to be the inner ones. I am thinking if the outer ones were leaking, the gun would lose pressure when it sits and it doesn’t do that.
Thanks!
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Viewing 8 replies - 1 through 8 (of 8 total)
Hammer spring too long is definitely a possibility. It acts like it. The regulator does work though, just not if I let it sit for more than a few minutes between shots. Once I hit 150 bar, the velocity does tend to drop off fairly rapidly.
it sounds like you have way too long hammer spring. or already off reg.
Actually, my hammer spring on this gun acts very strange. First of all, I am backed out as far as I can without the adjuster flying off the back of the gun. The o-ring on the hammer spring adjuster is completely exposed. Secondly, I can turn the adjuster in several complete turns and the velocity does not change one bit. Something is definitely not quite right with this gun. I haven’t tried it yet, but snipertq (?) on youtube showed a way to remove the regulator without disassembling the gun. He degassed it and stuck a narrow pipe down the air tube after removing the gauge and fill port. His tool has a loop of wire that he can cinch down below the lock nut on the regulator and pull it out. Once I receive my o-rings, I thought I would try to duplicate his tool and try.
Something is definitely not right with this gun though. Perhaps I should just send it back. I was told in no uncertain terms by Evgeny that he does not see the gun as user serviceable. Since I’ve had so many problems with it, I guess he can just send my retailer a new one.
chiro, detune the hammer spring a bit and see if it masks your problem. don’t go into the reg, it is too deep
Does the air escape from the airtube hole placed between regulator orings?
No, that’s why I think it’s going to be an inside the reg o ring. Thanks for the reply.
Firstly, replace the orings. If it does not help you can contact ATG.
Does the air escape from the airtube hole placed between regulator orings?
Nevermind, found them.
Does anyone have an opinion as to what is causing the regulator to allow the pressure to creep up? I am hoping it is an o-ring, but if it is the seat, I’m going to have to get AT to come to the rescue. I haven’t tried to depressurize the air tube and look at it yet. I wish I had a reg tester, but it is definitely letting the pressure at the valve increase as it sits.
Viewing 8 replies - 1 through 8 (of 8 total)
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Did you manage to resolve the issue?