FX Crown continuum Leaking from atmosphere port near Reg .Help require

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travandfx

Member
Mar 22, 2022
11
3
Tassie, Australia
Hi All .Rifle is a Crown Continuum, .25 cal 2 years old , How it started , I notice my reg had dropped from 150bar to 140ish and shot dropping low to normal, so I followed instructions in manual and gave the reg screw a 1/4 twist back , shot a few times and back to 150bar , next morning my Bottle is empty , I filled it and heard a leak , stripped it and found the air coming from the little hole near the reg rh side.
I ordered parts and my local shop had a full reg kit so I took the old stuff out and replaced . STILL LEAKING
Ive contacted FX and they are sending more seals , But if a new seal kit didnt work what will another one do .
Any help would be appreciated, this is my go to Pesting Rifle on my farm.
I have notice i can shine a light in the hole and see it inside the reg screw near where the Disc sit is, their are no scratches , its very clean,
The crown has been very reliable up until this issue .
Regards and Thanks to all who can help
Andy T
 
FX Airguns said:
Hi Andy , when changing all the orings on the regulator have you also replaced the oring inside the block that seals on the regulator body ?
Click to expand...
No I havent as I cant see where it goes , I cant feel any grove or runner in the hole ,the kit came with one but , Does it go in the body or on the Brass part . Thank for the advise . what I purchased was a new body with rings installed and new valve with rings installed , on the out side of the large brass valve it had one ring installed at the top and a second the same size in a bag , the one in the bag I have no idea where it goes.
 
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Scotty1 said:
It is in the body of the gun, hard to see, but it’s in there.
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I have looked and cannot see a ring anywhere in the Body , is it just below the threads ? At the bottom, at the top ? I tried the new reg and it leaks exactly the same, I tried it in a friends Crown and have no leaks . My next move is to send it back to FX here in Australia under warranty .
 
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It is very hard to see because it doesn’t really project into the reg bore, it is just below the threads in the gun body. You can see it here (barely),
the threads end, and the groove just past that is the o-ring.
IMG_8239.jpeg
 
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Like all have suggested, it’s that inner o ring. It’s in there, just hard to see as it’s black just like the guns anodizing. This is where one of those inexpensive bore scopes would be good to have, aside from checking the insides of your barrel.
If and when you do find it, judging from your experience, do not use steel o ring pic tools. Use brass or plastic. I’ve suggested on this forum in the past to remove that o ring take a fine, fine, needle, bend the tip at a slight angle, and prick the o ring to lever it out, vs trying to scoop out the o ring under its groove. But if you’re not careful, you can scratch the o ring groove and you’ll have a forever leak. Basically, your crowns block is now toast. Those o rings, sometimes one can get by by not changing them out when servicing or replacing their regs. Consider yourself lucky for those few times they reseal, but for the most part, it’s always good to change them out most especially if it’s known to be the original cause I can bet it’s dried up, possibly cracked, even.

If you do finally manage to find it and get it out safely, installing the new replacement can be equally a bear- you’ll pull your hair out. Take this advice, do not pre lube the o ring before installing it. It’ll keep sliding out of the groove when you’re trying to land it home. Instead, clean that entire cavity with a degreaser(I use acetone on a q-tip, blow out the area so all fuzzies are gone, install the new o ring, then snap the head of your q-tip, dip the q-tip stick in some silicone grease, then lather up the installed o ring as best you can.

Good luck
 
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Bigragu said:
Like all have suggested, it’s that inner o ring. It’s in there, just hard to see as it’s black just like the guns anodizing. This is where one of those inexpensive bore scopes would be good to have, aside from checking the insides of your barrel.
If and when you do find it, judging from your experience, do not use steel o ring pic tools. Use brass or plastic. I’ve suggested on this forum in the past to remove that o ring take a fine, fine, needle, bend the tip at a slight angle, and prick the o ring to lever it out, vs trying to scoop out the o ring under its groove. But if you’re not careful, you can scratch the o ring groove and you’ll have a forever leak. Basically, your crowns block is now toast. Those o rings, sometimes one can get by by not changing them out when servicing or replacing their regs. Consider yourself lucky for those few times they reseal, but for the most part, it’s always good to change them out most especially if it’s known to be the original cause I can bet it’s dried up, possibly cracked, even.

If you do finally manage to find it and get it out safely, installing the new replacement can be equally a bear- you’ll pull your hair out. Take this advice, do not pre lube the o ring before installing it. It’ll keep sliding out of the groove when you’re trying to land it home. Instead, clean that entire cavity with a degreaser(I use acetone on a q-tip, blow out the area so all fuzzies are gone, install the new o ring, then snap the head of your q-tip, dip the q-tip stick in some silicone grease, then lather up the installed o ring as best you can.

Good luck
Click to expand...
Thank you . That sucker is very hard to see. FX Australia have offered to do the work under warranty .
 
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travandfx said:
Thank you for that picture it was a great help . The rifle has been sent back to FX under warranty , due to the fact that the reg had never been out when it started leaking . So hopefully it is repaired without issue .
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you’re most welcome, I’m sure they will take care of it for you, and now you know!
 
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travandfx said:
Thank you . That sucker is very hard to see. FX Australia have offered to do the work under warranty .
Click to expand...
Let them do it! That Oring is a bear to get out! I did end up using a hooked dental pick and that made it a lot easier. I tried plastic hooks and brass hooks and neither would work for me. Installing it is easy. Just install the reg piston with all of the spring washers and it gives you a stop right even with the groove. As has been said, be very careful to not scratch the Oring groove or it will never stop leaking.

PXL_20240423_171012420.jpg
 
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