Thank you for this, will see if balancing the 2 regulators might help the issue or...?Thanks
Quote from: Goldwing on September 16, 2021, 01:59:09 AMThank you for this, will see if balancing the 2 regulators might help the issue or...?ThanksThat was my thinking, that the second reg may be dealing with too much pressure drop. Is it possible that the breech O-ring is missing, and that the noise is actually coming from there?If you shoot a pellet (in a safe direction) with tissue paper draped over the breech, and then draped over the reg, that tissue moving will often show where the air leak is strongest - pointing to the source of leaking air. Dry firing is not going to provoke such a leak, because the barrel is an easy escape path for the air.There may be an air leak between the valve and the rear of the barrel. Any place that is only pressurized on firing.
I could be wrong, but I'm pretty sure that blast of air isn't coming from your regulator. The regulator is much farther forward, so unless you're resting your cheek on the scope rail, it ain't gonna be blowing air in your ear. The more likely cause is the probe is too far back and the puff of air is coming from blow by at the breech o-ring. The easiest way to check is to remove the cheek rest, then take a shot(with a pellet/slug). Then take a peek down at the little 2.5mm allen that is used to remove the probe for caliber change etc.... If that little allen is sitting too far back to get to put an allen wrench in it, there's your problem. This happens when the screws holding the sidelever linkage to the cocking rod aren't tight enough, and the pressure of the shot cycle pushes the probe backwards far enough for air to blow past the breech o-ring. Don't check it, until you've fired a shot with a projectile in the barrel(dry fire doesn't count), and don't move the sidelever after the shot. Sometimes the screws on that cocking rod are just loose enough to allow the cocking rod/probe to slide back during shooting, but it moves back to the correct position after cocking the gun again. That will make you think the probe position is correct, even though it may not be. The solution is to tighten the grub screws down and use some blue loctite too. If that isn't it, let us know
I could be wrong, but I'm pretty sure that blast of air isn't coming from your regulator. The regulator is much farther forward
Quote from: Rallyshark on September 16, 2021, 09:42:25 PMI could be wrong, but I'm pretty sure that blast of air isn't coming from your regulator. The regulator is much farther forward, so unless you're resting your cheek on the scope rail, it ain't gonna be blowing air in your ear. The more likely cause is the probe is too far back and the puff of air is coming from blow by at the breech o-ring. The easiest way to check is to remove the cheek rest, then take a shot(with a pellet/slug). Then take a peek down at the little 2.5mm allen that is used to remove the probe for caliber change etc.... If that little allen is sitting too far back to get to put an allen wrench in it, there's your problem. This happens when the screws holding the sidelever linkage to the cocking rod aren't tight enough, and the pressure of the shot cycle pushes the probe backwards far enough for air to blow past the breech o-ring. Don't check it, until you've fired a shot with a projectile in the barrel(dry fire doesn't count), and don't move the sidelever after the shot. Sometimes the screws on that cocking rod are just loose enough to allow the cocking rod/probe to slide back during shooting, but it moves back to the correct position after cocking the gun again. That will make you think the probe position is correct, even though it may not be. The solution is to tighten the grub screws down and use some blue loctite too. If that isn't it, let us know To be clear there is NO blast of air off the cheek plate, there is in fact 85dB coming off it, why I KNOW it's right there, fking cross hairs, right there on the cheek plate, because I have 35 years of having tinnitus and my ears will not ring unless I get damaging sound level of 80 and up. Right after a session of shooting with a Silent Thunder Ordnance, Sarissa moderator screwed in. (best moderator found on the Maverick) so I know the gun was quite, but not the tail end in my right ear.If I get time I can do a video with a mike
Quote from: Rallyshark on September 16, 2021, 09:42:25 PMI could be wrong, but I'm pretty sure that blast of air isn't coming from your regulator. The regulator is much farther forwardDon't most FX airguns have two regulators these days? A forward one, and one near the breech.In any event, the reg should not be loud. I agree that this is an air leak near the breech. Chcking the probe for being loose is a good call.
Quote from: Goldwing on September 16, 2021, 10:56:24 PMQuote from: Rallyshark on September 16, 2021, 09:42:25 PMI could be wrong, but I'm pretty sure that blast of air isn't coming from your regulator. The regulator is much farther forward, so unless you're resting your cheek on the scope rail, it ain't gonna be blowing air in your ear. The more likely cause is the probe is too far back and the puff of air is coming from blow by at the breech o-ring. The easiest way to check is to remove the cheek rest, then take a shot(with a pellet/slug). Then take a peek down at the little 2.5mm allen that is used to remove the probe for caliber change etc.... If that little allen is sitting too far back to get to put an allen wrench in it, there's your problem. This happens when the screws holding the sidelever linkage to the cocking rod aren't tight enough, and the pressure of the shot cycle pushes the probe backwards far enough for air to blow past the breech o-ring. Don't check it, until you've fired a shot with a projectile in the barrel(dry fire doesn't count), and don't move the sidelever after the shot. Sometimes the screws on that cocking rod are just loose enough to allow the cocking rod/probe to slide back during shooting, but it moves back to the correct position after cocking the gun again. That will make you think the probe position is correct, even though it may not be. The solution is to tighten the grub screws down and use some blue loctite too. If that isn't it, let us know To be clear there is NO blast of air off the cheek plate, there is in fact 85dB coming off it, why I KNOW it's right there, fking cross hairs, right there on the cheek plate, because I have 35 years of having tinnitus and my ears will not ring unless I get damaging sound level of 80 and up. Right after a session of shooting with a Silent Thunder Ordnance, Sarissa moderator screwed in. (best moderator found on the Maverick) so I know the gun was quite, but not the tail end in my right ear.If I get time I can do a video with a mikeI only said blast of air, because of your title, and assumed it was air as well. Still, the probe sliding back will cause a POP that can very easily reach 85 db. I've had it happen to me a few times, and have seen others have it happen. The pop will come from right under the cheek rest where the probe inserts into the barrel. I could absolutely be wrong, but I know this gun very, very well. Fun fact, I also have a Sarissa on my gun. I'm just saying I don't think it's coming from the regulator. If it were, odds are the gun wouldn't hold air. I'm just trying to help man Quote from: subscriber on September 16, 2021, 11:28:19 PMQuote from: Rallyshark on September 16, 2021, 09:42:25 PMI could be wrong, but I'm pretty sure that blast of air isn't coming from your regulator. The regulator is much farther forwardDon't most FX airguns have two regulators these days? A forward one, and one near the breech.In any event, the reg should not be loud. I agree that this is an air leak near the breech. Chcking the probe for being loose is a good call.On the Maverick the 2nd regulator is quite a bit farther forward, because of the 89cc plenum it has. The second reg sits almost right where the handle for the sidelever is, so it towards the center of the scope rail well forward of the cheek rest. It is a little over 6" forward of the front edge of the cheek rest. The sub 12 versions do have the reg farther back, because that tube section is flipped around due to the sub 12 guns not actually needing all of that plenum.
I know this gun very, very well.
Quote from: Rallyshark on September 16, 2021, 11:44:45 PMI know this gun very, very well.Apparently so. If it is not a loose probe, then a missing O-ring...
So you don't have the gun and your guessing Mr Robert Kardashian?
Quote from: Goldwing on September 17, 2021, 08:44:19 AMSo you don't have the gun and your guessing Mr Robert Kardashian? Rallyshark has one. I am speculating, based on conjecture.
(speculation, as I don't own one).