Umarex Notos leaking through the barrel.

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20PPC

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Jul 8, 2019
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Good Morning,


My Notos is leaking air through the barrel. It won't take a charge. Anyone out there with ideas to what the problem is?? I've had it apart several times and tried somethings to no avail. I talked to Umarex and got nowhere. I've decided it will become a tomato stake if I can't fix it myself. By the time I ship it to Umarex and pay for repairs...it's not worth the hassle to me. Thanks in advance.
 
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20PPC said:
Good Morning,


My Notos is leaking air through the barrel. It won't take a charge. Anyone out there with ideas to what the problem is?? I've had it apart several times and tried somethings to no avail. I talked to Umarex and got nowhere. I've decided it will become a tomato stake if I can't fix it myself. By the time I ship it to Umarex and pay for repairs...it's not worth the hassle to me. Thanks in advance.
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Valve pin, stuck valve or whole valve assembly.
 
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6gun said:
If that's all that ends up needing to be done, what the heck is umarex customer service even doing?
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All I could get out of them was send the gun in. There smith would determine what was wrong with it. Also they won't sell parts. One of their techs last week said it was a three year warranty. I was suspicious of that comment. I thought it was for a year only. I talked to them again this morning. The story changed somewhat. The three year warranty is only good if their smith determines it's a safety issue. The tech I talked to...couldn't tell me what that was...soooo he said "send it in".

I tried cocking the rifle...it doesn't leak through the barrel anymore...now it's leaking right at where the air tube screws into the block on the action. Don't know if that is the regulator or maybe the poppet value?? I've taken both apart, and both look okay (whatever that means...lol!). Back to the drawing board!
 
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20PPC said:
All I could get out of them was send the gun in. There smith would determine what was wrong with it. Also they won't sell parts. One of their techs last week said it was a three year warranty. I was suspicious of that comment. I thought it was for a year only. I talked to them again this morning. The story changed somewhat. The three year warranty is only good if their smith determines it's a safety issue. The tech I talked to...couldn't tell me what that was...soooo he said "send it in".

I tried cocking the rifle...it doesn't leak through the barrel anymore...now it's leaking right at where the air tube screws into the block on the action. Don't know if that is the regulator or maybe the poppet value?? I've taken both apart, and both look okay (whatever that means...lol!). Back to the drawing board!
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The oring on the threaded piece on the block goes bad sometimes. Happened to me.
 
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20PPC said:
All I could get out of them was send the gun in. There smith would determine what was wrong with it. Also they won't sell parts. One of their techs last week said it was a three year warranty. I was suspicious of that comment. I thought it was for a year only. I talked to them again this morning. The story changed somewhat. The three year warranty is only good if their smith determines it's a safety issue. The tech I talked to...couldn't tell me what that was...soooo he said "send it in".

I tried cocking the rifle...it doesn't leak through the barrel anymore...now it's leaking right at where the air tube screws into the block on the action. Don't know if that is the regulator or maybe the poppet value?? I've taken both apart, and both look okay (whatever that means...lol!). Back to the drawing board!
Click to expand...
Just finished going through it again. I'm leaning toward the poppet value being the issue. It will now air up to 3,000psi and slowly leaks down. Gonna go ahead and order one from Maple. Thanks for the info guys.
 
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sounds like it needs the O-rings lubed or replaced, doubt it's the poppet valve, try putting Silicone oil in the filler probe and pump it into the gun, put about 10 drops, if you don't have Silicone oil you can get it on Amazon, at Hobby shop, it's Silicone shock oil for R/C cars, any weight viscosity,
it will lube the internal O-rings and help stop leaks.
 
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20PPC said:
Just finished going through it again. I'm leaning toward the poppet value being the issue. It will now air up to 3,000psi and slowly leaks down. Gonna go ahead and order one from Maple. Thanks for the info guys.
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The poppet wouldn't cause a leak through the front of the gun. Its thr 14x2 oring on the piece the tube threads on to.
Part 66 oring
 
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If the slow leak is the poppet that can be determined by putting a balloon over the end of the barrel. If the poppet is letting air by it will go out the barrel like before. It was leaking there before so it may be the cause ? If it’s leaking where the air tube goes into the action/block that isn’t the poppet and will just be a simple oring.
 
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Thanks to everyone.

I can now take this Notos apart and put it back to gather just about blindfolded...lol!

I did order a poppet valve from Mable and got a couple of sets of barrel o-rings coming. Pretty cheap stuff in the "scheme of things". I pulled the air tube apart again and adjusted the regulator back and worth (lubed o-rings again) and pressured it up. It held 2800psi pressure for about an hour "until" I dry fired it. Air went out of the muzzle end of the barrel again.

I'm gonna wait until the poppet valve and the barrel o-rings get here before trying anything else. I may be into one of the Huben Power Dream Regulators. I was hoping not for a couple of reasons...namely I didn't want to spend the cost of that regulator and a bottle for it (might as well buy a new Notos), and I do like the factory tube and number of shots for what I do with the Notos. I have a FX for the other stuff. I've had it seven years and shot thousands of Sage Rats with it and no problems to date.

Thanks again.
 
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20PPC said:
Thanks to everyone.

I can now take this Notos apart and put it back to gather just about blindfolded...lol!

I did order a poppet valve from Mable and got a couple of sets of barrel o-rings coming. Pretty cheap stuff in the "scheme of things". I pulled the air tube apart again and adjusted the regulator back and worth (lubed o-rings again) and pressured it up. It held 2800psi pressure for about an hour "until" I dry fired it. Air went out of the muzzle end of the barrel again.

I'm gonna wait until the poppet valve and the barrel o-rings get here before trying anything else. I may be into one of the Huben Power Dream Regulators. I was hoping not for a couple of reasons...namely I didn't want to spend the cost of that regulator and a bottle for it (might as well buy a new Notos), and I do like the factory tube and number of shots for what I do with the Notos. I have a FX for the other stuff. I've had it seven years and shot thousands of Sage Rats with it and no problems to date.

Thanks again.
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Thats a legitimate poppet issue. Or valve housing oring
 
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20PPC said:
All I could get out of them was send the gun in. There smith would determine what was wrong with it. Also they won't sell parts. One of their techs last week said it was a three year warranty. I was suspicious of that comment. I thought it was for a year only. I talked to them again this morning. The story changed somewhat. The three year warranty is only good if their smith determines it's a safety issue. The tech I talked to...couldn't tell me what that was...soooo he said "send it in".

I tried cocking the rifle...it doesn't leak through the barrel anymore...now it's leaking right at where the air tube screws into the block on the action. Don't know if that is the regulator or maybe the poppet value?? I've taken both apart, and both look okay (whatever that means...lol!). Back to the drawing board!
Click to expand...
I don't own a pcp umarex, just a cheesy break barrel pistol. I'd just find a oring kit or list and rebuild the entire gun, it's not that scary. I do fx guns in about 30 minutes, all 7k orings.
 
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6gun said:
I don't own a pcp umarex, just a cheesy break barrel pistol. I'd just find a oring kit or list and rebuild the entire gun, it's not that scary. I do fx guns in about 30 minutes, all 7k orings.
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If he doesn't mind funding the northern menace, Maple delrin or PEEK poppets are good. Be sure to cleanse the Canadian contamination off.
 
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A cheap way to fix a leaking poppet is to go to the auto parts store and get a tube of valve grinding compound for less than $10. Use it to grind the poppet into the valve with a drill turning the poppet. Then do the same thing with JB's bore cleaning paste. This routine has worked for me on both brass and plastic SPC poppets. One I fixed was from Maple. When I used it as received it did not leak but I reduced the diameter by half a millimeter and it leaked. But lapping it stopped the leaking. You need to remove the valve for the lapping but that is not hard if you tap the pin that restrains it out first.
 
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