Is there a safe way to degas a Maverick with Huma regulators?

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I have an FX Maverick 30 cal sniper. I'm using the original FX regulators, but I need more power. The FX regulators are limited to holding 170 bar. That's fine for the 2nd reg at 160 - 165 bar, but I need the first reg to hold at more than 170 bar and FX doesn't make a regulator for that kind of power. So my only option, it seems, is to go with an extra high pressure Huma reg for the 1st reg.

My problem is that I don't understand how the heck I'm supposed to degas the gun. I've been told that in order to degas my Maverick with Huma regs in it (or even one Huma reg as the 1st reg) I have to dry fire the gun until there's no air in it. I'm pretty sure my valve will get trashed that way from being slammed by the hammer with next to no pressure in the gun as the pressure drops.

I did read where some guys degas by loosening their 2nd air gauge. That sounds like a great way to wear out the seal under the gauge.

Does anybody know of a "safe" way to degas a Maverick with Huma regs in it -- a way that doesn't trash the valve or the regulators or the air gauge seal?

grungy
 
The reason FX recommends 170 max for regulator the delrin piston and if you order the brass piston you can safely to up to 200 bars to my understanding. Call FX and order the new brass pistons for FX regs and you should be good to go, cheaper than huma reg.

1665340468116.png


And this tool makes the job really easy.
910airguntuningandrepairsllc.com

Regulator Piston Removal Tool for FX Airguns

Regulator Piston Removal Tool for FX Airguns Effortlessly remove and install your FX Airguns regulator piston with ease. Slip the tool on to the regulator piston, tighten the tool to lock in the piston, and pull the piston out of the action. The regulator piston will be reusable as the tool will...
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Qball, thanks man! I would never have known that I have another option if it weren't for your post. AND, I've seen plenty of youtube vids where guys use a special "home made" tool for dealing with regulator piston/stack/o-ring replacement, but never seen them for sale. I joked (a grumpy joke) with my buddy who actually shoots this gun (I'm just the designated somewhat incompetent mechanic) that FX forgot to tell us that we need to own a machine shop in their advertisements.

So with Huma regs my option for degassing is unscrew the air gauge a bit. With FX regs with brass pistons I just degass as usual (unscrew tank and dry fire until it starts bleeding out).

Thank you all so much!

grungy
 
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HogKiller said:
Not a good idea. Jasmlowe is correct. Remove tank, dry fire a few times,it will start to l bleed off, there is a o-ring under the gauge. You can open the 2nd reg a bit from max to release the pressure.
Click to expand...


The down side of touching second reg is you need to retune again, first reg doesn’t need precision but second reg does. It’s best to just dry fire on lowest hammer spring setting but I see no reason to go to Huma regs now Fx has brass piston in their regulator. Loosen the reg gauge is ok but I rather not.

30 dollars for 2 pistons with shipping plus 50 dollars for the tool totally less than 1 huma reg and retain factory warranty and can just dry fire once to degass thanks to the venting feature of FX reg, that’s having your cake and eat it too IMHO.
 
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Hi again guys. I've decided to go with the FX brass piston option that Qball posted. I don't have to learn any new tricks that way, it's cheaper, and most important is that I'm not likely to screw up my valve, my regulators, or my air gauge seal. I know the FX regs don't recover as fast as the Huma regs for follow-up shots (I wish they did), but I'll gladly forego that benefit in order to avoid fixing stuff. Thanks again.
grungy
 
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grungy said:
Hi again guys. I've decided to go with the FX brass piston option that Qball posted. I don't have to learn any new tricks that way, it's cheaper, and most important is that I'm not likely to screw up my valve, my regulators, or my air gauge seal. I know the FX regs don't recover as fast as the Huma regs for follow-up shots (I wish they did), but I'll gladly forego that benefit in order to avoid fixing stuff. Thanks again.
grungy
Click to expand...


The reg with brass pistons also seem to recover quicker and quieter on all 4 of my upgraded FX guns. Huma regs are fine but I don’t see the point spending that kind of money for less features and no perceivable gains IMHO. I have 2 non FX guns with huma reg, one more on the way for another gun and I don’t see they are any better than FX regs plus Huma regs creep too.

Edit: one of my Huma reg creeps so bad I want to throw in the trash but at 130 bucks shipped I need to get off my lazy ass and rebuild it.
 
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Hey Qball, my mountain man buddy who is the real shooter of this gun will be very pleased with any improvement in recovery time for follow-up shots. He's one of those Kentucky windage kind of guys (in Idaho) and is just a natural. I'm into targets and ballistic programs, etc., and just a mediocre shot at best. He's a hunter. No email address. Doesn't know how to use a web browser. Like Crocodile Dundee. Doesn't know -- doesn't care. He literally chases bears for fun. I swear I'm not making this up. I don't mean he shoots bears. He literally runs after them chasing them through the woods for fun (without a gun). We just now had a chat and how "Qball" got us out from between a rock and hard place. He told me to thank you. Thank you. Cheers. Oh, and my buddy and I could not afford to buy this gun without each of us throwing money at it, so less expensive solutions are a plus.
grungy
 
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grungy said:
Hey Qball, my mountain man buddy who is the real shooter of this gun will be very pleased with any improvement in recovery time for follow-up shots. He's one of those Kentucky windage kind of guys (in Idaho) and is just a natural. I'm into targets and ballistic programs, etc., and just a mediocre shot at best. He's a hunter. No email address. Doesn't know how to use a web browser. Like Crocodile Dundee. Doesn't know -- doesn't care. He literally chases bears for fun. I swear I'm not making this up. I don't mean he shoots bears. He literally runs after them chasing them through the woods for fun (without a gun). We just now had a chat and how "Qball" got us out from between a rock and hard place. He told me to thank you. Thank you. Cheers. Oh, and my buddy and I could not afford to buy this gun without each of us throwing money at it, so less expensive solutions are a plus.
grungy
Click to expand...

You are welcome, helping each other is what this community is for.

If you want to save money then you can skip the tool. Find a retractable ballpoint pen and open the front so the piston would fit snugly. you might be able to remove the piston that way too if it's snug enough, careful not to drop the washers and write down the order/how they come out. If the piston doesn't want to come out then try needle nose but it would likely damage it but who cares since you are upgrading. Put the washers on the new brass piston the same order as they came out and inset it into the ballpoint pen. Insert the piston into the regulator and click, you are done!

Basically replace the fancy tool (very nice to have) with a retractable pen. Be sure to use lots of silicon lube!
 
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qball said:
You are welcome, helping each other is what this community is for.

If you want to save money then you can skip the tool. Find a retractable ballpoint pen and open the front so the piston would fit snugly. you might be able to remove the piston that way too if it's snug enough, careful not to drop the washers and write down the order/how they come out. If the piston doesn't want to come out then try needle nose but it would likely damage it but who cares since you are upgrading. Put the washers on the new brass piston the same order as they came out and inset it into the ballpoint pen. Insert the piston into the regulator and click, you are done!

Basically replace the fancy tool (very nice to have) with a retractable pen. Be sure to use lots of silicon lube!
Click to expand...
Qball, I like the tool, so I'm going to get that as opposed to me trying to do something clunky that I might regret. It is still saving money. If I were to buy Huma regs, I would only be able to afford ONE of those regs at the moment, whereas with this solution I get both of my existing FX regs up to par for less than one Huma. So here's a dumb question about Silicon oil -- Do I just spray it on the outside and inside of the tool before using it, or is there something else that needs it? I'm not supposed to spray the Bellville (spelling) washers with it am I?
grungy
 
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grungy said:
Qball, I like the tool, so I'm going to get that as opposed to me trying to do something clunky that I might regret. It is still saving money. If I were to buy Huma regs, I would only be able to afford ONE of those regs at the moment, whereas with this solution I get both of my existing FX regs up to par for less than one Huma. So here's a dumb question about Silicon oil -- Do I just spray it on the outside and inside of the tool before using it, or is there something else that needs it? I'm not supposed to spray the Bellville (spelling) washers with it am I?
grungy
Click to expand...


This is what I do so YMMV.

For the washers I use WD40 dry silicon lube, spray a little on and let it dry.

For o-rings I lather on the super lube silicon grease, no need to go over board but a little more won't hurt.
 
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qball said:
This is what I do so YMMV.

For the washers I use WD40 dry silicon lube, spray a little on can let it dry.

For o-rings I lather on the super lube silicon grease, no need to go over board but a little more won't hurt.
Click to expand...
Excellent info. I'm really looking forward to getting this mod done and start tuning for more power. Finally I'll be able to make use of all the hammer I have in reserve. Thanks Qball.
grungy
 
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qball said:
The reason FX recommends 170 max for regulator the delrin piston and if you order the brass piston you can safely to up to 200 bars to my understanding. Call FX and order the new brass pistons for FX regs and you should be good to go, cheaper than huma reg.

View attachment 296230

And this tool makes the job really easy.
910airguntuningandrepairsllc.com

Regulator Piston Removal Tool for FX Airguns

Regulator Piston Removal Tool for FX Airguns Effortlessly remove and install your FX Airguns regulator piston with ease. Slip the tool on to the regulator piston, tighten the tool to lock in the piston, and pull the piston out of the action. The regulator piston will be reusable as the tool will...
910airguntuningandrepairsllc.com 910airguntuningandrepairsllc.com
Click to expand...
Question: In order for my 1st reg to hold at, for example, 185 bar would I need different belleville spring washers?
grungy
 
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grungy said:
Question: In order for my 1st reg to hold at, for example, 185 bar would I need different belleville spring washers?
grung
Click to expand...


AFAIK no, if anything it might have different washer count and orientation from the factory but it doesn’t need to be precise so I wouldn’t worry about it much as long as I can hold the pressure.
 
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