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Air leaks out of FX Boss when filling from empty

Forums PCP Airguns Air leaks out of FX Boss when filling from empty

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    Profile photo of 7deuce
    7deuce
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    I know I filled my bottle from empty before and I had this issue. There’s a post somewhere but I can’t find it. So I replaced a bad bottle gauge on my FX Boss and had to bleed to bottle to empty. Now I tried to fill the gun back up with a Joe B slow valve tank and the air is blowing out of the barrel. I know I’ve dealt with this before. Please, somebody refresh my memory on how to fix this. 

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    amoxom
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    Try cocking the gun and leaving the lever open, and then try filling to see if that makes a difference?

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    7deuce
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    Thanks xarus and amoxom for relieving my brain fart. I knew it was something simple. I was looking on YouTube and the only video I found wanted me to hit the gun with a rubber mallet. 

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    Scirroco
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    Hi 7 deuce
    Sometimes if guns are shot at to low pressure, sometimes the main valve can stick open,this was a frequent with my sons brockock, cocking the gun and a quick blast from a fast fill air tank usually unsticks the valves and reseats it,also had it happen many years ago on a daystate
    Rgds steve

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    HavocX
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    My Royale does this from time to time. No matter how much air I blast in it will not shut.  I usually have to loosen the barrel and rotate it upside down then give it a good blast of air.  This shuts or seats the valve and is good to go! 

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    sniperlabyo
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    Boss have a free
    floating hammer that doesn’t have constant hammer spring tension on the valve.

    one quick check with no pressure in the gun, in the side of the action there is a hole that you can see the valve stem blocking half of the hole, use a small Allen and push it forward you should feel the spring tension cycle 2-3 times, the valve movement should be smooth with a return snap of the valve spring.

    by doing this you will find out:

    1. the valve isn’t bending and movement is smooth and fully close.

    2. If you can’t see the end the of valve stem The valve is stuck open unable to go back to the bore—this happen when pressure is to low when fired 

    still leaking after blasting it shut?

    the metal valve seat oring is leaking, the delrine or metal seat to be resurface. 

     

    • This reply was modified 10 months ago by sniperlabyo.
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    Profile photo of airfan
    airfan
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    hi , I know , had the same problem . Let me know if your still having it or want to know how to solve it . Its the valve that is fixed because one shots it on an empty regulator chamber .  you have to just reinstall the valve .  

    • This reply was modified 8 months ago by airfan.
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    aa_limited
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    any luck after? what did you do to get air back into your gun?

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    7deuce
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    Stupid easy suggestion from ^. I cocked it and it filled with no issues. Thanks for the help again!

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