milled ReTro Valve not firing with ULT on/off

[Tachiro]

- It seems like none of the shim amounts between 1-5 have made any difference here.

- i checked the ULT, looks like it's just the ULT in there. no extra orings or anything in the valve.


So onto some of the latest tests:

I took the bolt out and aired it up with the trigger held. No leak or anything. Then i let go of the trigger and a burst of air escaped (i cut off the tank air so i don't waste it, but i'm assuming it would just continue).

Now i put the bolt in without the spring and aired up with the trigger held. No leaking. Then i let go of the trigger and heard a soft but constant leak. I pull the trigger and it fired once.

[Tachiro]

test updates:

- Not sure if this matters, but i was also able to try and put the whole mag together without the body, which was quite interesting. I stuck my thumb behind the bolt to push it forward so that i can see how it engages the sear. When i pull the trigger, the release point seemed a bit late so i moved the trigger rod forward.
Now it releases somewhere around halfway through the pull. I gassed it up and that didn't make a difference though. Still won't fire.

- I also realized i don't have enough shims. I figured i could try and put all the shims in the bolt to see what happens. Even though it didn't fire, I'm seeing that regardless, i also made a drastic change at the same time by putting the ULT in with no shims at all.

- Now i'm considering buying a new ULT to see if there might've been some detail about this ULT that was too subtle for me to catch during this whole saga.

[athomas]

Try this:

Install the valve without a bolt or bolt spring installed. Hold the trigger and gas it up. As long as you hold the trigger, it shouldn't leak. If it does, then there is a leak past the on-off, which isn't one of your problems. Gently release the trigger until it leaks out the powertube. You can control the air flow by holding or releasing the trigger. It will give you and idea of where in the trigger pull the on-off actually opens and closes, if it opens at all.