Hi guys, I have a problem with my new reg. I installed new huma air 2nd reg on my fx impact m3. I turned set screw all the way in, but when I screwed in the bottle second reg gauge went all the way to 150 bars (along with 2 other gauges). Isn't it supposed to be at zero when the set screw on the reg turned all the way in?
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FX New Huma Air second reg Gen 3 problem (FX Impact M3)
- Thread starter JVari
- Start date
"all the way in", not cranked down I hope. For giggles can you take pics of it apart? Honestly I'm a Maverick guy but doesn't the M3 only have 2 gauges?
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All the way in until it stops, no force. M3 have 3 gauges, first reg, second and bottle pressure.
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It should be at zero on the second there are different lengths of piston on the huma second reg one for higher pressure one for lower pressure my huma that I tried came with directions to change the stack accordingly to how high you want to adjust it
Stock stack I believe is like this ()()()()()(
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Ok, thanks,I may have been looking at the wrong FX drawing.....oh I see, it's on the bottom of the stock pointing down, got it.
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I compared the piston length on huma and it's exactly the same as original from FX. I got extra hight pressure huma, the spring stack on those is: )()()()(
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Interesting, what is the thickness of the springs? THAT determines the top pressure, thicker means more pressure, at least on the AMP regs. Ok HUMA is using a flat piece between the adjuster and the piston in-place of the two convex surfaces, the length of the piston also plays a role in it, too long reduced pressure, too short, higher pressure. Of course I could just be blowing smoke here,.
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Not sure what's the spring thickness. I don't think thickness is an issue here, tons of people installing exactly the same reg on their M3 without any problems.
I've tried to reassemble it couple times, nothing works. This just drives me nuts, I have no idea what to do.
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You've replaced the o-rings? Not that ANYONE has EVER gotten a reg with bad o-rings. Me holding up my 
.
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I had this problem with my side mount reg gauge install and basically just gave up on it. Then had the prob of resealing the grub screw after!
Same meaning some people seemed to have no problem. I decided my unit was faulty and moved on.
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I really hoped it's a common issue and some one can help me here with easy fix, but looks like not a lot of people had the same problem
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Are you sure you didn’t just get a faulty reg? Can you return it and ask for a replacement? This might be your path of least resistance.I really hoped it's a common issue and some one can help me here with easy fix, but looks like not a lot of people had the same problem
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I put the amp reg back in used peek and brass piston then took and used the huma washer in the stack I wanted
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I'm not sure what the deal was I guess I should have gotten caliper out and measure for any difference in length it's also possible the got wrong orings I suppose
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