LvL 10 and Bolt Stick

[AvitalBlueX]

Setup:
X-valve
Carrier with 2 lines and 1 dot
3 shims
Shortest spring (can't put middle or large spring cause i can't turn velocity up enough w/o it venting)
flatline with 900PSI input

My gun is about 2-3 months old and i have put about 4-5 cases through it and worked great untill about a week ago. Every once in a while the bolt would stick, wouldn't leak, pulling trigger didn't help, nothing worked unless i push the bolt back (with quite a bit of force sometimes) with my finger or a squegee during a game. So i pulled the valve out checked the orings i could at the time everything seemed to be fine and i oiled the hell out of it. That seem to work for about an hour. Then it started doing it again. Next day i pulled out the carrier and shims and just went through the whole lvl10 tutorial, i was able to go up one carrier, the one i use now (the next one leaks, i used the broken in carrier black oring and the white on the inside of it also) but still needed 3 shims (4th shim make it vent all the time). Put it back together everything works perfect. Fire the gun a lot (bounced it a bit) and it started again. So check everything and it still fine (the bolt stick would be very rare but i would still have to use my finger to push it back in). For the hell of it i turn down the Input to 800 and it "seemed" to happen less but then again it could have nothing to do with it. I have no clue as to what is causeing it or how to fix it.

Thanks in advance

[ZapTheMad]

Your bolt spring could be getting weak. After the gun fires, there is some residual pressure in the dump chamber. Your spring may not be strong enough to overcome that pressure.

[AvitalBlueX]

Eh...but the spring is only 3 months old.

[the electrician]

what is the rest of your set-up?

did you change or modify the on/off? the on/off pin?

alot of times what happens is the sear gets kicked back and is pressing against the bottom of the bolt. this can slow the bolt down and, if the pin has been modified, it might let air into the dump chamber while the sear is in this halfway position. this adds to the problem.

does the bolt leak air when it does not reset properly?

[AvitalBlueX]

Nope havn't modified on/off or on/off pin, and it doesn't leak when it doesn't reset either.

[athomas]

i used the broken in carrier black oring and the white on the inside of it also)

The white o-ring in the carrier is the o-ring that matters. Did you try going to the larger carrier after you removed a shim or two?

It is possible that the small on/off top o-ring is leaking air into the front chamber, causing the chamber to have a little more residual pressure than it should. This could prevent the bolt from resetting.

Maybe you need to replace the carrier o-ring with a new one and go through the setup procedure again.

[abunkerer]

With an X-valve you should be able to use the middle spring or even the large one without venting from the back. If your carrier is too tight then it might "chuff" instead of "vent"...chuff vent, fart...expell gas.
anyway, an x valve should work fine with the middle spring, the reason why your bolt isn't resetting is probably because you need more return force, and the middle spring will accomplish this. Toss back in the carrier you were using, and the "broken in" (white) carrier oring, take out a shim or two, use just one or two dosen't really make a diff. and put a nice light coat of grease on the valve stem, and powertube, a few drops of oil in the powertube, and a few in the asa for fun. also take out the On/Off assembly and put a few drops of oil in there and a light coat of grease on the pin. Your bolt stem should slide effortlessly into the powertube, if you hold it right when the bolt stem is about to go into the powertube and release it it should drop all the way down into position ( drop test ) You are good for the next month now. and the gun should work with no problems...

[veedell26]

go up a size with the o ring carrier and oil the powertube itself before you play

[AvitalBlueX]

I went up one carrier size but didn't use any of the broken in orings and everything works great now, even went through a whole 3k fill to make sure. But what i think was the problem is the carrier oring that i had been using had a nice slice in it (probably from me removing orings with small screw driver) is what was causing the problem. Thanks for the help guys.

O and no i can't use any of the springs becides the smallest one because i can't turn my velocity up high enough w/o it venting out the back, but happy it works now and it doesn't bother me that i can't. (could altitude have anything to do with it?, cause my friend has a lvl10 installed on his RT valve and he can't use the middle or long spring either).

[athomas]

Altitude shouldn't affect it. The type/length of barrel you are using will affect it though. If you are using a barrel that requires more gas to be expelled to reach the desired velocity then you you may reach the overpressure threshold at a lower velocity.

[AvitalBlueX]

12" J&J Ceramic