lvl 7 xvalve weird prob, need diagnosis

[fhawkeye]

Firstly: Xvalve, ULT on/off, lvl 7, ULE body, AM/MM rail, Intelliframe

Symptoms: A random combination of shoot-down, firing upon de-gas, firing upon release of trigger, and bolt will "hickup" multiple rounds down the barrel until able to fire them all at once.

Keep in mind, it works just fine with the level 10 assy and yes, I installed the lvl 7 correctly and tested for right spacer.

Spent almost 3 hours on phone with Roman at AGD and I think his head might have exploded I don't know; someone who knows him personally might want to check and see if he's still okay.

Things already tried/checked:
-Sear assembly: checks out (credit card rule applied)
-Different body and rail: same issues
-Added/subtracted shims in ULT
-tried different bumpers
-tried different springs (yellow)
-checked bolt for signs of wear and damage (it's actually a fresh bolt, just bought it new)
-checked seals everywhere in valve for everything.
-made sure front and rear field strip screws were tightened all the way
-air input is consistently 850-900
-Ball detente, checked to see if was rubbing against bolt.
-tried different velocity adjustments (half turn in a couple times, half turn out a couple times)

At one point I tried the lvl 10 again and thought it was acting erratically, this is incorrect the tank was just too low on air. Found another tank to test it out and it worked just fine and didn't have enough air left over to toy with lvl 7 more, This weekend I'll have access to a fill station and a chrono where I can accurately measure the velocity with the lvl 7 and see if that might have been the issue.

Sorry for the novel that is my post, hoping to get a collection of other things I can try this weekend. If doesn't work I got an RA number and will ship it to AGD on Monday.

[Stanzo]

uhh

wait, your putting a Level 7 on a X Valve? ive never done this personally but i have a feeling it wasnt made for it. But i dont see how it could actually cause any problems. Did you do any sorta tinkering with the ULT? possibly you put it in incorrectly? Ive had a situation in the past where i put the on/off lowers upside down. But i havnt seen a ULT in some years so i could be wrong there.
Just my idea but it could be the level 7 fact. Why are you putting one on it anyways? (Curious)

[Ando]

Shootdown means something is starving your valve.

A few things that will cause this would be:
-ASA on/off: I've never came across one but some have reported they can push the tanks reg seat too far in and basically cut the air flow a bit.
-Dirt or debris inside the valve. Tear down your valve and Q-Tip (clean) the hell out of it.
-Reg seat pin assy. Somethings probably not installed right, missing or could have a bad oring or 2.

You wouldn't be using a Quad-Oring in your on/off or another regulator somewhere in the system would you? On 2 different occasions, couple of guys were complaining about shoot down. One had a Gen-X reg which was starving the valve, the other had a Quad-Oring installed in a mec setup. Not too sure why the quad was causing shoot down but it was. Quads are mainly used on E-mags so that could be why but I don't see why that would make a difference. I'm sure once you figure out why the valve isn't getting enough air, the rest of your problems will go away.

Last thing. #1 thing people don't do is feed their mags. They LOVE oil. Fill the QD at the valve with oil and shoot it out. Don't put it in the ASA, by the time it reaches your valve it's already thinned out and the valve gets next to nothing in it.

When all else fails. I would do a full packing change.


EDIT: Re-read your post again.

Keep in mind, it works just fine with the level 10 assy and yes, I installed the lvl 7 correctly and tested for right spacer.

Hmm....

-made sure front and rear field strip screws were tightened all the way

Try loosening those screws. The field strip should only be finger tight and the front screw should be 1/4 turn after you fell the sharp rise in torque when tightening it down.

[Bigwooly1013]

why the level 7 on the x-vavle. The only reason i could even think of would be a pump conversion or putting an e-frame on with eyes.

Either way.

Make sure that your grip screws aren't too long and pinching the sear (had this happen before and i chased my tail for a month trying to figure it out.


also remember the level 7 bolt system require much less pressure (not sure if that's the right term or not) to operate than the level 10. When i convert one of mine back to a level 7 it's like 2-3 full turns out on the velocity adjustment to get it shooting right.

[fhawkeye]

Yes it is for a pump conversion, the idea is to have a single marker I can switch from a pump to a fast semi by swapping the wave spring and bumper which is why it's on an xvalve with a ULT.

And whatever confusion there was with the lvl10/lvl7 quote in my OP, that was just to clarify that it works fine with the lvl 10, the problem occurs with the lvl7 installed but not necessarily because of the lvl 7 (make sense?)

-not using a quad o-ring, the system stays extremely well oiled in fact a couple months ago I attempted to over oil it by taking the x-valve completely apart and clogging every orifice with oil (yeah it's not possible lol), reset the velocity still nothing.

After fiddling with it extensively over the weekend with unlimited air access I've become 90% sure that the excess weight of the lvl 7 is shaking the ULE body loose from am/mm rail for one reason or another. I've tried using shorter and longer screws with and without washers.
I'll tighten it up, re-assemble everything and after 3-4 shots the body will start wobbling.

And I know I said it was still acting up with a different type of body and rail however this could have been because I was working with very little air in the tank, seemed fine on a full tank.

Either way, I just over-nighted the set-up to AGD. There's something simple I'm not finding and I just don't have the time right now to go on a wild goose chase with college winding down. This way I just get to know for sure what exactly is wrong and I'll be able to fix it fast next time I see it.

Thanks for the help though and I'll post what it is when I get it back. anymore questions, I'll answer.