Trouble with *possibly* my HUMA regulator

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Trouble with possibly my HUMA regulator

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Go4Robby

Post subject: Trouble with *possibly* my HUMA regulator

Posted: Tue Dec 05, 2023 7:05 pm

Joined: Sat Oct 31, 2020 1:40 pm
Posts: 105

Hello fellow airheads, I’m experiencing something weird with my HUMA regulator. It’s setup at 1600 PSI in my .22 Marauder. The rifle is also equipped with a spring stopping guide. I’ve recently disassembled it for cleanup and the gun is holding air, the regulator gauge shows 1600 PSI as it should. Upon measuring the speed with my chrony, I’m getting 3-4 shots with very low spread (877, 874, 875, 876) then for some reason it dips down to 844-846 for 2-3 shots, and comes back up at 875 for the 3 following shots. I’ve shot 4 strings now and all 4 show a similar pattern. The regulator gauge shows 1600 throughout all the shots. Pretty much at a loss here. Does anyone have an explanation for this, and possibly a fix ? This behaviour wasn’t there before disassembly, and I haven’t touched the regulator body (only switched the o-ring).

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Current owner of :
Diana 280 T06 .177
QB78 Deluxe .22
Diana Outlaw .177
Benjamin Marauder .177/.22/.25
Benjamin Armada .25
HW 80 .22
HW100KT .22

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Daryl

Post subject: Re: Trouble with *possibly* my HUMA regulator

Posted: Wed Dec 06, 2023 4:12 pm

Joined: Wed Jan 05, 2011 12:35 pm
Posts: 11369
Location: P.G. B.C.

Only thing I can suggest is waiting an exact specified time between shots, like 30 seconds, 1 or 2 minutes.

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Daryl

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Ravenairgun

Post subject: Re: Trouble with *possibly* my HUMA regulator

Posted: Fri Dec 08, 2023 11:59 pm

Joined: Mon May 06, 2019 4:07 pm
Posts: 680

mine was doing that too did u not the same gun or reg but same chrony string were it would drop....what lube u using on the hammer? sounds like a bad hammer strike

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Go4Robby

Post subject: Re: Trouble with *possibly* my HUMA regulator

Posted: Sat Dec 09, 2023 5:10 pm

Joined: Sat Oct 31, 2020 1:40 pm
Posts: 105

Seems the problem was with the hammer spring, as I swapped it for a slightly shorter and stiffer one and the shots are now consistent across 4 strings. PCPs do work in mysterious ways…

_________________
Current owner of :
Diana 280 T06 .177
QB78 Deluxe .22
Diana Outlaw .177
Benjamin Marauder .177/.22/.25
Benjamin Armada .25
HW 80 .22
HW100KT .22

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