Tuning Edgun r3m huma reg issue

[PkShooter]

After fitting the huma reg and plenum, air leaks from the tiny breathing hole in the cylinder when I start filling 

reg tester shows the reg is fine, but I still changed the seals on it 

strange, as no leaking if I use the huma reg with the original edgun reg body as a plenum

this leaves me with no other thought, other than it’s an issue with the huma plenum. However, this is highly unlikely upon knowing huma quality and the fact the plenum is simply an empty tube

any help would be appreciated 

 

[hotspur0425]

Following...had the same issue and had to put the original reg back in

 

[Seeker]

Remove the whole reg+chamber assembly and place it next to the air tube. We will see if the dimensions are fine - the purpose of that small hole is to vent your reg.

 

[PkShooter]

Ok surprised but also glad I’m not the only one with this problem 

air clearly isn’t sealing and common sense would dictate the problem is due to the plenum .., either being minutely too small in diameter or some kind of hair fracture in the body itself 

I’ve told huma about this and I’ve paid for a new plenum to be sent to me. They said it’ll be checked to ensure it’s working before being shipped to me

 

[PkShooter]

I’ll take some pics on the next disassembly but I did measure it against the edgun reg assembly and it seems the same

 

[PkShooter]

Above is edgun regulator assembly and below is the huma plenum and reg

both diameter measurements are the same 

I’ve tried white tape under the o ring and silicone grease inside the cylinder and also on the plenum, but still leaks from breathing hole when I start to fill

any ideas what the problem could be?

 

[nugria]

Hi All,

I'll give it a stab.

I gather the bleed hole is between the two orings on the Edgun regulator set-up?

If that is so, the Huma assembly must be sealed between the regulator and plenum body. It appears that there may be an oring (face seal) missing where I put the "?"

Also. Does the regulator body go in the opposite end from the layout?

Sorry. I'm a long way from the hardware

HTH,

Nugria

 

[PkShooter]

Yes, the bleed hole is in between those o rings 

and yes that’s the problem, the huma reg isn’t sealing with the huma plenum body 

there’s no o ring which goes on the huma reg where you’ve pointed out, and it seals on the tester ok without an oring there too

The huma reg goes in exactly where you’ve pointed out 

I’m hoping someone must’ve encountered this same problem and maybe found a solution 

 

[nugria]

Hi PkShooter,

IMHO, it is missing an o-ring. The Huma reg tester uses face seals top and bottom that are smaller in diameter than the flange that seals with the plenum. I pulled a Huma/Edgun regulator from its plenum and it looks like the photo below. Mine has an o-ring

Nugria

ps. My o-ring is stuck in the regulator. Otherwise I'd pull it out to measure it. 

 

[PkShooter]

Thank you nugria!

will fit the huma reg and plenum in the next day or two, but I already know you’ve answered my problem 

I just didn’t see anywhere or read that a oring had to be fitted there

makes total sense tho and kinda kicking myself for not noticing that before 

appreciate your help, you’re a gent and thanks again 

 

[PkShooter]

Finally got round to fixing my r3m and the oring you pointed out was indeed missing from the start and I didn’t think of it neither 

so thanks again for your help

with the huma reg and hammer weight fitted, 34gr are maxing out at 860

my r3m is the standard version 

anyone able to get more than this with a standard I wonder?

back to the kings it is

 

[budrow]

Been struggling with this for the past 3 days + and came upon the thread.. Mine didn't have an O ring either and was leaking from the vent hole with the huma but not with the original, I have a r5m long.. I'll be testing it. Once I received my new pressure gauge.. But it sure looks like this was the problem. 

thanks again AGN !!!

 

[budrow]

Directly from Huma air. They state this is a common issue for the leak.. missing oring at the base of the Regulator.. none of the instructional videos mentioned this..