X-Valve Please Help

[FORDI]

Hope someone can help as im totally stuck and am thinkin of gettin rid of the damn thing!

SPEC:

ULE Mag built by the Magsmith, owned for 4 years now and bought new.

X-Valve
ULT 2 shims
Level X Bolt 2 shims
850psi ari sys

PROBLEMS:

Worked perfect for 3 years with one day a month usage properly striped/oiled after and before every use.

Issues started about 6 months ago after not using the gun for about 3 months.

When i air up the marker the sear would click into place as normal i then press the trigger and it fires 2-3 shots, holding the trigger its fully auto.

When placing something infront of the bolt and fireing the bolt will come foward but will not reset and justs vents lots of air.

Can only reset by pushing the bolt all the way back.

All orings shims etc look perfect and have tried the bolt system on another mag and it works fine.

I was under the impression that when you press the trigger and hold the marker fires once and the bolt resets, engaging the on/off so no more air can pass through to the powertube!
Can anyone confirm this as the bolt is just staying foward and venting heavily.

The one thing i have noticed is that when you crack open the two halfs of the valve there is a piston in the middle with lots of orings round it, (sorry about the description but i can remember the name of the part) anyway between the two small white orings at the front there is a plastic ring which looks like its cracked but still solid.

Dont know if its the problem but could be??????

Please help guys as ive had mags for many years now and am really getting p****d off with it.

My 15 year old classic Has never had any problems and still rocks!!!!!!!

Cheers.......

[kcombs9]

"anyway between the two small white orings at the front there is a plastic ring which looks like its cracked but still solid"

^^This is normal don't touch it.

how tight do you have the field strip screw?

[Ando]

Need more oil captain!!!
I had a X that did the same thing after sitting for a long while. I dumped oil in the QD of the valve 2 different times to get it working properly.

Tear it down, lube everything up and try again.

The part your talking about is your Reg Valve Pin Assy. Remove it and oil it. That poor thing gets neglected more then any part of the marker. The "crack" is normal

If the oil doesn't help. Replace your bolt spring or re-tune your lvl 10

[FORDI]

Bit more history.......

I always soak my orings in oil for 24 hours before i play then add a few drop for good look so im pretty sure its not a lubrication problem.

As for the field strip screw and the frame screw i always hand tighten then 1/4-1/2 tighten with an allen key.

The marker was bought new with the red spring installed and has worked fine for me at 280fps since.

I have tried the middle and shorter spring with no effect!

I was at a site yesterday with my laptop for 6 hours trying lots of different solutions off AO.

The main problem is the venting down the barrel while holding the bolt because it wont reset.

Cheers for the replys tho guys

Keep them comin!!!!!!!

[211]

add more shims to the LVX, that should get it to vent and reset

[FA22RaptorF22]

Funny thing is that i have YET to get a LvL X valve to work on anything other than the gold spring.

It seems that you have to crank the velocity way too much to get the dump chamber to overcome the spring tension.

[kcombs9]

Funny thing is that i have YET to get a LvL X valve to work on anything other than the gold spring.

It seems that you have to crank the velocity way too much to get the dump chamber to overcome the spring tension.

Check your springs make sure they slide over the bolt ok. My red spring is too tight on each end so it Pinchas the bolt and wont fire cause of too much resistance from the spring to slide onto the end of the bolt.

OP

the gun still vents when Holding the trigger down? or does it go into full auto every time you hold it down?

[FORDI]

Just tried 2,4,6,8 shims and still the same problem.

Spring feels fine.

Holding the trigger just makes it go full auto and when the bolt stops on something in the breach it still just vents.

Ive tried the bolt sys on my other classic mag, same set up with 2 shims and red spring and it works fine


Also ive just ran out of air aaarrrrrrggggghhhhhhhh!!!!!!!

[kcombs9]

Sounds like your on/off is bad. do you have an extra rt on/off? ULT would work too but RT on/off's are easier to trouble shoot the valve IMO.

[Looper]

I bought a used valve once that did this...

Turned out the thing was assembled incorrectly; the (32) Regulator Seat Holder was in backwards. Verify that you have the guts installed correctly to an AGD diagram and that your on/off o-rings are fine (there are three; two on top and one small black one inside). I would remove any shims fro your LVLX, that is not your problem with full auto. Get you back end fixed first then work on tuning your LVLX.

[FORDI]

It only came with the ULT.

As for assembely its just as per the diagram.

[athomas]

If it leaks when the trigger is held, the problem is with one of the top two orings in the ULT. They would be the small one at the top and the larger one around the outside at the top. The problem is most likely the smaller one.

[FORDI]

The top oring fits really snug to the pin.

I have a spare and have tried that and its an even tighter fit.

If the pin seals with the top oring when you press the trigger why should it go fully auto as sureley no more air should get to the power tube or have i got this wrong?

My point being that when sealed only one shot worth of air is forced down the power tube and when this is gone the bolt resets but in my case air keeps coming out.

[athomas]

You are correct in your assumptions. But leaking means that something is not sealing. Did you try the larger oring on the outside of the ULT assembly?

Perhaps the leak is coming from the regulator part of the valve. Check the two orings on the regulator piston assembly that are separated by the plastic split ring. If there is a piece of debris on these or in the hole that they occupy, then air could leak past this. Another oring that could cause the issue is number 34 in the diagram. It prevents air from backfeeding down the regulator piston assembly and into the chamber. These orings usually don't cause issues, but it is the next logical place to look.

[FORDI]

All orings fit really snug however does the reg seat oring 34 fit in the reg seat 32 or in the adjacent space in the reg?