Maintenance Help with a leak

[Air86]

My paradigm has a slow leak, I get bubbles coming from the block and tube, question…are the 2 o-rings the same size? And which o-rings do I get, thanks

 

[Airgun-hobbyist]

Buy them in bulk from theoringstore.com When you order them, on the print, the middle set of numbers is the reference to size. There's a few of us who successfully use urethane o-rings #122 on the air cylinder/regulator in both 70 and 90 duro to keep the o-ring from being cut during installation or extruding later on in it's life. (I like the softer 70 duro here for more surface contact.)

Also, check out my post on the modified air cylinder installation procedure, that helps prevent cutting the o-rings upon installation.

Maintenance - Modified assembly procedure for the regulator and air cylinder on original Evol models...

Overview of the long post: On the original generation Evol's, to prevent the threads cutting the o-rings upon re-assembly, first install/push the regulator deep down into the air cylinder so the o-ring is just past the threads. Then screw on the air cylinder onto the receiver, ensuring the...

community.hardairmagazine.com

Viton o-rings: https://www.theoringstore.com/store/index.php?main_page=index&cPath=367_5_4

Urethane o-rings: https://www.theoringstore.com/store/index.php?main_page=index&cPath=367_459_458

 

[Danman]

Buy them in bulk from theoringstore.com When you order them, on the print, the middle set of numbers is the reference to size. There's a few of us who successfully use urethane o-rings #122 on the air cylinder/regulator in both 70 and 90 duro to keep the o-ring from being cut during installation or extruding later on in it's life. (I like the softer 70 duro here for more surface contact.)

Also, check out my post on the modified air cylinder installation procedure, that helps prevent cutting the o-rings upon installation.

Maintenance - Modified assembly procedure for the regulator and air cylinder on original Evol models...

Overview of the long post: On the original generation Evol's, to prevent the threads cutting the o-rings upon re-assembly, first install/push the regulator deep down into the air cylinder so the o-ring is just past the threads. Then screw on the air cylinder onto the receiver, ensuring the...

community.hardairmagazine.com

Viton o-rings: https://www.theoringstore.com/store/index.php?main_page=index&cPath=367_5_4

Urethane o-rings: https://www.theoringstore.com/store/index.php?main_page=index&cPath=367_459_458


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Oh wow nice handy chart!! Now if other manufacturers felt like sharing this info that would be swell. I went through a fair amount to get o-rings sourced for my hand pump last year... Then once I figured it out I bought 20 or so

 

[Air86]

I have replaced both of the #122 and still it leaks, i have a feeling I'm using the wrong o-ring 1-1/8 ID is the size I'm using in a 90 duro, is that the right size?

 

[Peskådot671]

Just curious. What pressure are you filling to when you notice it leaks? Also, when you changed the #122 o-ring on the regulator, how are you installing it back into the air cylinder?

 

[Air86]

Just curious. What pressure are you filling to when you notice it leaks? Also, when you changed the #122 o-ring on the regulator, how are you installing it back into the air cylinder?

i can pretty much fill it to any pressure 2000psi and up and it'll leak, very slow leak...I'm putting the reg in the tube past the threads then screwing the tube on, the other side where the gauge is you really can't do that

 

[PasadenaMike]

Oh no I thought you bought the one I returned but I thought wrong

 

[Air86]

Oh no I thought you bought the one I returned but I thought wrong

nope, dont think so

 

[PasadenaMike]

nope, dont think so

lol mine was a mini so you’re safe

 

[pan60]

Oh no I thought you bought the one I returned but I thought wrong

i called about it but it wa already gone they said it was the guage

 

[PasadenaMike]

i called about it but it wa already gone they said it was the guage

Oh good to know. The gauge leaks are the slow leaks. I figured but hey shouldn’t leak new

 

[pan60]

Oh good to know. The gauge leaks are the slow leaks. I figured but hey shouldn’t leak new

i would agree. and would say that would be true for all of them even a leaking leshiy

 

[PasadenaMike]

i would agree. and would say that would be true for all of them even a leaking leshiy

Yeah actually I had to dunk my leishy classic to find the Leak at the gauge. Leshiys get a pass if they leak

 

[EDventure Outdoors]

My EVOL developed a very slow leak since the last silhouette match. It was down to zero.

The fill port was a smidge loose so I tightened that up and added a drop of silicone oil. Filled it to 3,500 and it's down to ~3,200. I understand that could be the extreme temperature variations.

My next step assuming it continues to leak down is the regulator. Is that correct or are there other common areas for the EVOL to start?

Thanks in advance for the help.

 

[PasadenaMike]

If it goes to 3200 and stays for a couple days it’s normal after a fill but if it continues to leak down then you have other leaks

 

[Airgun-hobbyist]

The best money is on the cylinder to receiver o-ring #122 having extruded and or developed a cut. It is the big o-ring on the regulator. I just changed one last week after the ring split.

 

[EDventure Outdoors]

The best money is on the cylinder to receiver o-ring #122 having extruded and or developed a cut. It is the big o-ring on the regulator. I just changed one last week after the ring split.

Cool! That sounds like a relatively easy change. Hopefully, AoA has those in stock.

 

[PasadenaMike]

Cool! That sounds like a relatively easy change. Hopefully, AoA has those in stock.

Soap it up and verify