N/A Regulator stopped working

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Caliber 22

Caliber 22

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Nov 29, 2023
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The regulator of my Artemis M22 just stopped working. At full tube pressure speed was down a lot and it would shoot low, increasing the speed as the pressure went down. At first I cleaned the hammer and hammer tube but that did not help. Last night I took out the regulator to check the O-rings but everything seemed fine. It did look clean and lightly oiled so I just reassembled it. This morning when testing it was back to normal and kept it's speed from full air tube, 250 bar all the way to empty. It is now shooting as before again.

Is it a general thing with regulators to just act like that or will there be something else wrong causing it not to work as supposed to do?
 
Hi, let me preface this by saying i don't know diddly about the Artemis regulators or the gun for that matter, I'm sure there is someone on this forum that does. Have you done a search? Does the gun hold pressure over night? If yes than skip any leaks in the reg. If No then a bad o-ring, always a good idea to change them out anyway. I see that they don't have a breather hole so, you'd have to balloon the barrel, probe closed. Side note, I see that Lane and Huma both make regs for it. How about the breech o-ring, I'm assuming there is one, is it good?
 
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HogKiller said:
Hi, let me preface this by saying i don't know diddly about the Artemis regulators or the gun for that matter, I'm sure there is someone on this forum that does. Have you done a search? Does the gun hold pressure over night? If yes than skip any leaks in the reg. If No then a bad o-ring, always a good idea to change them out anyway. I see that they don't have a breather hole so, you'd have to balloon the barrel, probe closed. Side note, I see that Lane and Huma both make regs for it. How about the breech o-ring, I'm assuming there is one, is it good?
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"Have you done a search?" Yes, I searched here and elsewhere.
"Does the gun hold pressure over night?" Yes, it will hold pressure for a week IF I let it lie that long.
"I see that they don't have a breather hole" There is a breather hole in the regulator and it breaths out the tube threads where there is no O-ring.
"I see that Lane and Huma both make regs for it." I saw that and was thinking about replacement if this one gives me more grieve.
Question; Which one is the best? Lane or Huma ?
"How about the breech o-ring ...." I replaced it recently.

Thanks for the reply.
 
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Motorhead said:
I your NOT losing pressure as in a leak ?
And what ever tank pressure is, also is the plenum pressure ?

You have #1 a failed o-ring on the seat height adjuster if one in present in the regs design.

That or debris on .... or just a damaged seat sealing surface
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"I your NOT losing pressure as in a leak ?" No, there is no leak causing it to loose pressure.
"And what ever tank pressure is, also is the plenum pressure ?" The rifle only has a tube pressure gauge. It does not have a plenum gauge.
"You have #1 a failed o-ring on the seat height adjuster if one in present in the regs design." I am not sure if a O-ring failed. Everything looked OK.
"That or debris on .... or just a damaged seat sealing surface" If it was debris, I did not see anything. Do you think debris can enter into the pressure tube via the pump? I am using a hand pump. There is filters in the pump line. If so, that might be the problem, I did not think about that.

Thanks for the reply.
 
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jarmstrong said:
sounds like the regulator was stuck open,,, your tear down and cleaning must have freed it up,,, nothing like SPA/Artemis QC
if it happens again, ya might want to polish the belleville washers and like Scott said,,, seat sealing surfaces
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As the regulator looked clean I did not remove the O-rings to clean it. But if there was something, maybe it came out as I opened the regulator.
Does it sometimes happens that a regulator get stuck?

Thanks for the reply.
 
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Klaas said:
"I your NOT losing pressure as in a leak ?" No, there is no leak causing it to loose pressure.
"And what ever tank pressure is, also is the plenum pressure ?" The rifle only has a tube pressure gauge. It does not have a plenum gauge.
"You have #1 a failed o-ring on the seat height adjuster if one in present in the regs design." I am not sure if a O-ring failed. Everything looked OK.
"That or debris on .... or just a damaged seat sealing surface" If it was debris, I did not see anything. Do you think debris can enter into the pressure tube via the pump? I am using a hand pump. There is filters in the pump line. If so, that might be the problem, I did not think about that.

Thanks for the reply.
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Pretty sure our buddy Jack nailed it. What kind of lube are you using on it? Personally I like synthetic motor oil, it's slick. Just a VERY light coat on your fingers then rub everything or a bit on a clean microfiber towel. I prefer my fingers, you can feel imperfections.
 
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HogKiller said:
Pretty sure our buddy Jack nailed it. What kind of lube are you using on it? Personally I like synthetic motor oil, it's slick. Just a VERY light coat on your fingers then rub everything or a bit on a clean microfiber towel. I prefer my fingers, you can feel imperfections.
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Silicon oil. I see that is what is recommended by most, including Robert Lane.

Who is Jack? I assume jarmstrong.
 
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Klaas said:
If it happens again I will replace all the regulator O-rings, just in case that is the problem. I did not check what size they are but will do so if I open it again.

What hardness O-rings must be used in a regulator? I saw some conflicting info. Some say 70 others say 90. Or does it not matter?
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Yeah, that .... if it moves 90, if it doesn't , 70. As I stated I use Synthetic motor oil, not a fan of silicon. I've done the regs in both of my Mavericks and it's been longer than I can remember, still working great. NOTE: If the o-ring that requires a 90 is SMALL, chuck it in boiling water, that'll soften it up and let you get it on instead of breaking it. It won't hurt it. You'll need some pointy tweezers to handle them. The Maverick has some really tiny ones (2x1), a total PIA but the method works.
 
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HogKiller said:
Yeah, that .... if it moves 90, if it doesn't , 70. As I stated I use Synthetic motor oil, not a fan of silicon. I've done the regs in both of my Mavericks and it's been longer than I can remember, still working great. NOTE: If the o-ring that requires a 90 is SMALL, chuck it in boiling water, that'll soften it up and let you get it on instead of breaking it. It won't hurt it. You'll need some pointy tweezers to handle them. The Maverick has some really tiny ones (2x1), a total PIA but the method works.
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"if it moves 90, if it doesn't , 70 " OK, Thanks, that is a good way to remember. If I think of the size of the O-rings it must be 4x1.5 of 5x1.5, I did not measure. But definitely 1.5.
 
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REGULATOR inner spool can not get "Stuck" unless ... :unsure:

There is Corrosion / Rust within the interior spaces and on the parts.
Or reg has been unused for so long that the o-rings have hardened and Glued / Adhered themself to the body of the regulator.

*As one who has serviced 100's & hundreds of PCP regulators made from Aluminum, Brass, Steel & some plastics .... they fail for other reasons, but getting stuck or hung up is not one of them if there clean & lightly lubricated.
 
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Motorhead said:
REGULATOR inner spool can not get "Stuck" unless ... :unsure:

There is Corrosion / Rust within the interior spaces and on the parts.
Or reg has been unused for so long that the o-rings have hardened and Glued / Adhered themself to the body of the regulator.

*As one who has serviced 100's & hundreds of PCP regulators made from Aluminum, Brass, Steel & some plastics .... they fail for other reasons, but getting stuck or hung up is not one of them if there clean & lightly lubricated.
Click to expand...
Thanks.
There is no visible corrosion. The regulator body is anodised aluminium and all moving parts is stainless steel, apart from the Belleville washers.
The rifle get used regularly.
 
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My thoughts after reading all the replies (thanks for that) is that there was some debris in there. With that the high pressure moved through to the plenum. It must have been so that the air moved at a high rate as each consecutive shot was low speed, increasing slowly until the tube reached about 200 bar and then the speed started to rise at a higher rate. Unfortunately the plenum does not have a gauge to see what is happening.
 
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Motorhead said:
see Answer #3 :rolleyes:
Generally if you dismantle an o-ring sealed devise ... reassemble with NEW o-rings ;)
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I opened the tube quite a few times to adjust the regulator. I only replaced the tube O-rings the first time as the originals were of those that swell under pressure. I used 70 DM O-rings after some recommendations. All the other times I opened it I did not replace the O-rings. But that would cause a leak to the atmosphere if faulty as it is not inside the regulator. But I will do it next time.
 
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