"Unsolvable" leak, Wildcat mkii amp reg

[BZapp7]

Had my wildcat setting for awhile and it developed a leak out of the atmosphere hole. Unbeknownst to me I shot it a few times with no air.
Tore down the reg twice now and replaced all of its' orings twice and still leaks out of the atmosphere hole. I've even verified that all my orings are the correct sizes by 910airguntuners video. Where should I go next? It's getting quite frustrating now.

 

[Stubbers]

I've heard this story before but forget how it ended, try the search function and you'd likely find the thread that covers this exact issue! Otherwise hopefully someone chimes in and heres a free bump!

-Matt

 

[nervoustrig]

Hopefully Matt's right about it being a known issue someone will recognize. Meanwhile a question that might narrow in on it...is it a rushing leak you can hear or a slow, silent type?

Any chance you could have scratched one of the sealing surfaces while extracting one of the O-rings? That's a common cause of slow leaks, particularly where high durometer (90) and/or small cross-section O-rings are used.

 

[WorriedMan]

Might consider heading to Huma website and pricing out one of their replacement regs.

 

[Ranchibi]

Same thing has happened to my friends mki Crown, leaks thru vent hole for reg. Replaced o'ring inside reg body as well as the outer ones, still leaks. Have a new reg coming from FX from Sweden as We couldn't source one here in the US...hope it works! Or will have to go Huma....

 

[Trucker3573]

I think there is an oring in the gun body itself too where the reg screws out. Did you replace that as well ?

 

[Stubbers]

If any sealing surfaces appear to have scratches you could try to lightly sand down the raised portion of the scratch, and/or wrap the sealing surface with a single wrap of teflon tape before installing the oring, you can also do the latter if any oring fitment appears too loose, to increase the o-ring squeeze.

-Matt

 

[BZapp7]

Hopefully Matt's right about it being a known issue someone will recognize. Meanwhile a question that might narrow in on it...is it a rushing leak you can hear or a slow, silent type?

Any chance you could have scratched one of the sealing surfaces while

xtracting one of the O-rings? That's a common cause of slow leaks, particularly where high durometer (90) and/or small cross-section O-rings are used.

I could hear it at first but didn't recollect hearing it after oring replacement. You may be right about your query. I did use an Allen to get the inner oring in on the main body...it did occur to me to be gentle as not to gouge it but I didn't guess a light scratch would hurt... live and learn I reckon .
So would you concur that it's leaking past the two 2 x 1 90 durometers on the "adjuster"?

 

[nervoustrig]

A leak from the atmospheric vent means air is getting to the area occupied by the Belleville washers. so the culprit would be one of the O-rings sealing the ends of the piston.

If the O-ring on the adjuster were bad, the reservoir pressure would drive up the plenum pressure.

 

[BZapp7]

I think there is an oring in the gun body itself too where the reg screws out. Did you replace that as well ?

I replaced all of them

 

[BZapp7]

So my further research came up with polishing surfaces and cleaning for non-visible dirt... I'll try that.
Are the huma regs simpler in design?

 

[TwoLoe88]

Had my wildcat setting for awhile and it developed a leak out of the atmosphere hole. Unbeknownst to me I shot it a few times with no air.
Tore down the reg twice now and replaced all of its' orings twice and still leaks out of the atmosphere hole. I've even verified that all my orings are the correct sizes by 910airguntuners video. Where should I go next? It's getting quite frustrating now.

Have you thought about sending it to FX USA to get resealed? The full reseal price is pretty reasonable.

 

[BZapp7]

Have you thought about sending it to FX USA to get resealed? The full reseal price is pretty reasonable.

I have not...may need to try that thanks!