Fx crown air leak- HELP

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RabbitBlaster

RabbitBlaster

Member
Jan 19, 2019
121
1
Wellington, New Zealand
Hi folks. I tried to swap out my crown continuum valve seat for a larger one. For the first 5 shots it worked great then on the last shot all the air emptied out through my barrel. I was told that the delrin on my pin might have been too small to seal properly so i put the old valve seat back in and when i went to fill the tank, air just came straight out the barrel. Also air came through the breach if i had the cocking lever open. 

This is now leaking using the original valve seat. Does anyone have any idea what else may be the cause? O rings look ok in it.

Thanks for the help!
 
Don't cringe when I say to fire it.

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Yo is on the right track. The valve you put in might not have sealed properly and when you put the original valve back in, you could have damaged the valve o-ring. I've had them leak like that and couldn't see a defect at all. I looked through my 3x glasses and could see a tiny scratch that was causing the problem. What I'd suggest, if you're in there anyway, change all the o-rings you come across and wipe them down with pure silicone if you have some. It certainly can't hurt and you might fix the problem without knowing exactly what o-ring it was. I would bet it's either the valve seat, the o-ring on the outside of the valve or the one on the valve housing(D37, D38 and D42 I think). Good luck. Let us know what happens! Happy 4th!

Stoti

Here you go... https://spares.bagnallandkirkwood.co.uk/wp-content/uploads/2017/12/Fx-Crown-Exploded-drawing-bk-done.pdf
 
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I don't have my Crown anymore and am trying to remember back to which was which. I then pulled up the schematic and took a look. I think O-rings D37 and D38 are correct. D42 is the valve seat. If it was working before you swapped out the valve, I would bet it's got to be one of these o-rings. Sorry, the valve housing is just the outside of the valve D-36, where the oring is located.

Stoti
 
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I think i fixed it. I just had installed a Huma extra high pressure washer set. Huma had sent one extra bellville washer and i put in into the reg. I think this made my reg piston too stiff and it went off reg dumped everything at a higher pressure than it would have normally. I took the extra washer out and it seems to be working at the moment. It is at least holding air when it wouldn't before.
 
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