I could really use some help with this one since i believe that it has become a dangerous issue. I have installed a HUMA regulator supposedly set to 130 Bar with the OEM gauge in my Marauder with no leaks or problems during the install it was straight forward following the directions. My problem started after my first fill i kept the pressure on my Hill pump at 2900 psi on the marauder gauge it read 2200 psi and since this type of regulator only reads the regulated pressure i though that it was a bit too high since i was really looking forward to about 1800-1900 regulated psi. i wanted more shots per fill so i dry fire the marauder empty the pressure and removed the regulator made what i really believe was a small adjustment to the regulator moving the pressure setting brass screw clockwise about an 1/8 of a turn to bring down the pressure,i reinstalled it with no problems i started refilling it and trying to keep track of psi on the Hill pump..Now this is where the problem began the Pump is reading 1500 psi when i stopped to check but the regulator gauge on the Marauder read Zero on the red which tells me that i have 1500 psi in the tank that i would like to empty so i can access the regulator to find out what happen ( No dry firing this time it would not do any good ) with no pressure from the regulator going to the valve.. any help or thoughts on this would greatly be appreciated since i am f new to the PCP world, but i have read quite a few forum post on the regulator subject an have a basic understanding on how they work.but i have not seen this problem on any post so far
22 Cal. Gen 2 Benjamin Marauder ( HUMA Regulator Problem )
- Thread starter Phil18
- Start date
I recommend you contact HUMA and see what they recommend in this situation. My thought is you probably adjusted the regulator too much, in the wrong direction to prevent air from flowing through (if the regulator is designed that way). Or you installed the regulator backwards. Either way, contacting HUMA is your best bet. This is the first situation I've heard of air being trapped from the air gauge to the air fill and poses a very dangerous situation.
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Assuming the regulator is not in backwards (if you screwed in the gauge it is not backwards), then try tapping the side of the air tube at the regulator, and see if it recovers. The central screw may have rotated and pinched off incoming airflow to the regulator, but unlikely. Another very small possibility is something fell into the small hole which air gets to the gauge, causing to show no air pressure, when it actually exists. Try dry firing the rifle and see if you get a puff of air, if so, the gauge is not reading accurately.
As a sub note: my Huma puts out more pressure than what it is set for as well. I set mine to 1900, and for the first shot (when it was new), it would creep up to 2200 PSI; subsequent shots were at 2000 PSI. After a couple days of use, the regulator creep became less severe.
As a sub note: my Huma puts out more pressure than what it is set for as well. I set mine to 1900, and for the first shot (when it was new), it would creep up to 2200 PSI; subsequent shots were at 2000 PSI. After a couple days of use, the regulator creep became less severe.
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Thanks for your prompt reply,i will try to gently tapping on the side of the regulator and see if it recovers and i get lucky,in any case i will be in touch with HUMA to see if they may have other suggestions.I do understand that this is a VERY serious and dangerous issue that needs to be address somewhat delicate and with extreme caution, I will post my results on the solution to this problem to possibly help other airgunners that may encounter the same regulator issue.
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What state do you live in Phil18.. Perhaps someone local to you can give you a hand. I am in far Southern Arizona, should you be near.
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Thank you addertooth i really appreciate that you're trying to assist me with this problem,unfortunately i am located in North Carolina,i don't hunt anymore but i really like Plinking.I am sure that i will find a SAFE solution to this problem,as a retired industrial maintenance mechanic i am fully aware of some of the high pressure issues mainly hydraulic but this is a new one on me
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Phil, I've been giving this a thought all day. Wondering, what if I get into this situation with my Marauder where air is trapped in the cylinder and can't bled off with a degassing tool (say the valve stem snapped flush with the valve body). I've read somewhere of slowly unscrewing the air gauge, but never heard back from that person if he was successful. Plus, I haven't run across your scenario where the air is trapped between the air gauge block and fill port.
The Hatsan, such as the Carnivore come with a removable air reservoir. Along with it come with a brass cap to protect the valve at the end of the air reservoir when not in use. Also, as you can see in the picture, the cap can also be used to bleed the air reservoir by screwing the brass cap on the "air res" and screwing in the allen screw to open the valve and release the air. The air escape from the small hole you see on the side of the brass cap.
Before I continue, this suggestion can be dangerous and not to be done without a full understanding of how your air rifle and it's internal parts operate. Continue at your discretion.
What I suggest is using the fill cap on the Marauder to bleed the air thru the fill adapter. First you'll have to drill a hole on the side of the cap somewhere above the threads. Next find a stiff piece of metal rod that can fit inside the fill port (nail). But small enough to move freely. Here's the tricky part... cut the metal rod to a length where, when screwing on the fill cap, the fill cap will press the metal rod down into the fill port, releasing air. Also, getting the rod at the right length to allow enough thread on the fill cap to thread on the fill housing and preventing the cap from flying off and letting air escape through the small hole you drilled prior. Hope this makes sense. Or unless someone else come up with a safer way to bleed the air trapped between the air gauge block and fill port of a Marauder. Best of Luck
The Hatsan, such as the Carnivore come with a removable air reservoir. Along with it come with a brass cap to protect the valve at the end of the air reservoir when not in use. Also, as you can see in the picture, the cap can also be used to bleed the air reservoir by screwing the brass cap on the "air res" and screwing in the allen screw to open the valve and release the air. The air escape from the small hole you see on the side of the brass cap.
Before I continue, this suggestion can be dangerous and not to be done without a full understanding of how your air rifle and it's internal parts operate. Continue at your discretion.
What I suggest is using the fill cap on the Marauder to bleed the air thru the fill adapter. First you'll have to drill a hole on the side of the cap somewhere above the threads. Next find a stiff piece of metal rod that can fit inside the fill port (nail). But small enough to move freely. Here's the tricky part... cut the metal rod to a length where, when screwing on the fill cap, the fill cap will press the metal rod down into the fill port, releasing air. Also, getting the rod at the right length to allow enough thread on the fill cap to thread on the fill housing and preventing the cap from flying off and letting air escape through the small hole you drilled prior. Hope this makes sense. Or unless someone else come up with a safer way to bleed the air trapped between the air gauge block and fill port of a Marauder. Best of Luck
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Thanks Dartagnan this is a scenario that to other airgunners though probably extremely rare it can happen ( due to a defective part or installers fault they would not know until rifle is pressurize i am guessing that this is where the vented regulator may be a better option ) i am just surprise that none of the regulator manufacturers have realised this and if they have why not create some sort of ( Optional Safety Cushion even if it is installed in a Non regulated rifle ) a device lets say like a different fill cap with a small breeder, that could be installed of course at the owners discretion.I know that the Airgun manufacturers probably are not and will not be interested in addressing such an issue since they are probably against altering their product in any way with aftermarket parts..Anyway this is all food for though...
Back to the problem i like your suggestions, even though there is no really a safe way for the average person with average equipment to relieve this pressure,i am leaning towards one of your suggestions of very slowly unscrewing the regulator gauge and here is why,since i do not have any visible pressure registering at the gauge and also i do not have any pressure coming out of the barrel when dry fired the gun, the gauge may have a small amount of pressure still leaking in but not large enough to register on the gauge ( lets say hypothetically 50 psi ) by breaking loose a very small amount the gauge and listening with a stethoscope for air leakage even if it is a small amount by letting it slowly bleed out over perhaps a long period of time may work,either way is risky..i really have to give this some though i am just hoping that directly or indirectly that i haven't turn this very good rifle into a sort of expensive very large and dangerous paper weight..Again i truly appreciate your suggestion towards resolving this problem..
Wishing you and your family a very Happy and Healthy Holiday Season
Back to the problem i like your suggestions, even though there is no really a safe way for the average person with average equipment to relieve this pressure,i am leaning towards one of your suggestions of very slowly unscrewing the regulator gauge and here is why,since i do not have any visible pressure registering at the gauge and also i do not have any pressure coming out of the barrel when dry fired the gun, the gauge may have a small amount of pressure still leaking in but not large enough to register on the gauge ( lets say hypothetically 50 psi ) by breaking loose a very small amount the gauge and listening with a stethoscope for air leakage even if it is a small amount by letting it slowly bleed out over perhaps a long period of time may work,either way is risky..i really have to give this some though i am just hoping that directly or indirectly that i haven't turn this very good rifle into a sort of expensive very large and dangerous paper weight..Again i truly appreciate your suggestion towards resolving this problem..
Wishing you and your family a very Happy and Healthy Holiday Season
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Dartagnan Just a quick update i was able to remove completely the regulator gauge ( and installed it back again) with unfortunately no positive results,i was hoping for some sort of small leakage into the regulator but this is a total pressure blockage from the filler tank to the regulator.It appears that at this time i must evaluate the second option and your suggestion of trying to find access through the fill valve,i understood your explanation very well my concern with this is what type of valve. Is it a Schrader valve ? and what pressure does it take to force open.At this point i am going to do some research in my area to see if i can locate a Airgun Pro that may help me resolve this..i really do not want to push my luck trying to resolve this problem.I seen a video on YouTube on some individuals that were servicing a PCP rifle while being fully pressurize and the rifle exploded and they were real lucky to be alive PCPs by no means are not toys...
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There is a parts diagram out there for the Marauders but here's a snap shot of the fill valve / housing.
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Why not reattach your pump and pump until the fill port opens to allow air to enter the tube. Once the air fill check valve is open you can then very slowly and slightly open the air bleed on the pump until the air slowly vents out. If you do not open it far it should allow the air to escape from the tube without the fill check valve closing.
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it will work. Just make sure you open the bleed SLOWLY. If you get too aggressive and the air stops, you just need to put a couple pumps back into it and start again.
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WOW!! Finally got the Marauder depressurize,the suggestion on the bleeding using the pump worked great i hooked the pump up and pump it until the valve open and the cylinder started to take pressure again,i stop grab the old mechanic stethoscope and as suggested opened the pump bleeder very slowly listening for just for a hint of air escaping out of pump bleeder and left it like this all night...in the morning no more pressure thank you all for your suggestions. Now i am sending the regulator back to see if they can find out if it was something that i might have done our perhaps a faulty regulator.. either way it has been a Great Learning experience. thanks again and i will keep you posted on the findings on the regulator
Have a Happy and Safe Holiday Season
thank you all for your suggestions. Now i am sending the regulator back to see if they can find out if it was something that i might have done our perhaps a faulty regulator.. either way it has been a Great Learning experience. thanks again and i will keep you posted on the findings on the regulatorHave a Happy and Safe Holiday Season
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Also, check the knob and make sure it didn't get rotated. Check the center screw and make sure it wasn't turned in so far it pinched off the air flow.
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