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Old 04-04-2012, 03:10 PM   #1
dummkauf
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Dec 2009
Minneapolis MN
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Ok, so I've got a big CO2 tank, and have been troubleshooting this for a while now. I thought I had a leak somewhere since the tank would empty after a couple of months(2-3), so it's atleast a small leak. Anyway, after refilling again yesterday, I started digging. I'd previously checked all my hoses and connections with soapy water, and the regulator's connections(threads, hose outlet, etc...). Couldn't find anything, so I finally just splashed the whole regulator with soapy water.....and I finally got a bubble!

But, I'm not sure if it's supposed to be doing that or not. The bubble is coming out of a small hole underneath the screw I use to set pressure. I have a double regulator and only the regulator on the left does this, if I cover that hole on the right one with soapy water, I get no bubbles, so I'm guessing there shouldn't be gas(air???) coming out of that hole on the left one.

So now the question is, how do I go about fixing this? Anyone know?




 
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Old 04-04-2012, 03:20 PM   #2
phoenixs4r
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Jun 2011
Hayward, California
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Take the regulator apart and replace the oring or diaphragm, whichever is busted. Its been while since I've taken one apart so I don't vividly recall the inner workings, but I do remember them being deceptively simple devices.

 
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Old 04-04-2012, 03:27 PM   #3
dummkauf
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thanks, I was guessing something wasn't sealing in there.

Since this will be the first regulator I've ever pulled apart(I'm mechanically inclined enough that I'm not worried about doing this), if I were to walk into my LHBS(Midwest) and ask them for an oring or a diaphram, they would know what Im' talking about right?

 
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Old 04-04-2012, 03:30 PM   #4
phoenixs4r
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I've never shopped there. I'd imagine its the little oring, and if so you could get it at a hardware store. If its the diaphragm I'm not sure where you would get that. Maybe try a welding supply shop, airgas if you have one in your area.

 
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Old 04-05-2012, 02:42 AM   #5
dummkauf
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Dec 2009
Minneapolis MN
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Ok, I finally pulled apart the regulator tonight. I can't see any visible tears or holes in the diaphragm or the little orange ring the diaphragm nipple goes into.

Looking at midwest's site, this looks like what I would need to replace the parts: http://www.midwestsupplies.com/keggi...epair-kit.html

However, when I pulled the face off, all I saw was the diaphragm and the orange gasket thingie. I have no clue what the little black o-ring is for, or the little metal piece....maybe I need to pull the regulator apart more??? I just removed the 4 screws to get the front cover off so far.

Does anyone by any chance have a diagram of regulators Midwest sells? This is the regulator I have: http://www.midwestsupplies.com/keggi...regulator.html

I've found some regulator schematics with google, but none look exactly like the one I have.

 
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Old 04-05-2012, 03:13 AM   #6
phoenixs4r
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Is there an oring on the adjustment screw where it is leaking? If so I'd replace that and then go from there.

 
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Old 04-05-2012, 03:17 AM   #7
day_trippr
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May 2011
Stow, MA
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Did you come across this one? A pdf parts explosion drawing of what might be a generic Cornelius primary regulator. It lists the repair kit contents by item number referencing the parts table and diagram...

Cheers!

 
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Old 04-05-2012, 03:20 AM   #8
dummkauf
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Dec 2009
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Quote:
Originally Posted by phoenixs4r View Post
Is there an oring on the adjustment screw where it is leaking? If so I'd replace that and then go from there.
Negative. The adjustment screw has a metal bowl on the end that pushes against a spring. The sprint presses on the brass center of the diaphragm. The diaphragm nipple sticks into the orange gasket. There are no other visible rubber parts without pulling the regulator even further apart.

edit: I also pulled apart the regulator on the right. This is exactly the same as the left, but doesn't leak, and also doesn't leak after reassembly......I thought I might be missing a gasket in the left one, but after examining the right everything appears to be the same between the 2.

 
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Old 04-05-2012, 03:21 AM   #9
dummkauf
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Dec 2009
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Quote:
Originally Posted by day_trippr View Post
Did you come across this one? A pdf parts explosion drawing of what might be a generic Cornelius primary regulator. It lists the repair kit contents by item number referencing the parts table and diagram...

Cheers!
No I did not....thank you!!!!!!!!!

 
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Old 04-05-2012, 03:23 AM   #10
phoenixs4r
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Quote:
Originally Posted by dummkauf

Negative. The adjustment screw has a metal bowl on the end that pushes against a spring. The sprint presses on the brass center of the diaphragm. The diaphragm nipple sticks into the orange gasket. There are no other visible rubber parts without pulling the regulator even further apart.
Hmmm. Could have been a misaligned diaphragm. You could try to line it up better and reassemble and see if that helps. Its hard to trouble shoot a regulator over the internet. Lol

 
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