So I just bought my first pcp a gamo urban .22. It came filled to about 3000 psi. I shot maybe 40 shots out of it and the pressure gauge wouldn’t drop until maybe a day later and was at about 1800 when I went to refill the first time with a hand pump. I pumped maybe 80 times until the pump pressure gauge read 3000. The gun pressure gauge still read 1800. There is no air leak. I went out and shot about 20 shots and now pressure is at 2000. Is there a problem with the gauge on the gun? Shouldn’t it be going up immediately as you’re pumping?
Gamo urban pressure gauge
- Thread starter Brookie10
- Start date
I would say its not working, could be a piece of debris or something between the gun and gauge.If it was mine i would degas the gun unscrew the gauge and clean it and try again before returning it if that didn't work. I do own a couple PCPs but never owned a Gamo so just a suggestion.
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My story sounds a lot like yours. I purchased an Urban a few months back as my first PCP. I absolutely loved it (and still do), but it came with a defective pressure gauge. So I contacted Gamo and they quickly mailed me a replacement gauge free of charge.
Once I got the replacement gauge, I shot the gun until there was a noticeable drop in pressure. Then I dry fired (which apparently is safe to do with a PCP) to completely empty the air cylinder. Afterwards I removed the original gauge and replaced it with the new manometer from Gamo. After hand pumping the gun back up to pressure and firing a few rounds, I was disappointed to discover the new gauge also appeared to be defective. So I figured what the hell, the gun shoots extremely well..I'll just go by the gauge on my hand pump and refill it whenever my zero begins to drift.
Well, I ended reading a post on another forum where someone mentioned his manometer was torqued too tight and after he backed it out a little, it resulted in a functioning gauge. Well sure enough, just yesterday in fact, I decided to give this a go. Shot the gun to empty, removed the gauge, tightened it just finger tight and snugged it up just a little with a wrench. Gauge has been working properly ever since.
I'm wondering if this was the case with the original gauge. Apparently, they don't have to be as tightly torqued as you would think. I filled my gun to 2900 PSI last night and it was still at the same pressure this morning.
Once I got the replacement gauge, I shot the gun until there was a noticeable drop in pressure. Then I dry fired (which apparently is safe to do with a PCP) to completely empty the air cylinder. Afterwards I removed the original gauge and replaced it with the new manometer from Gamo. After hand pumping the gun back up to pressure and firing a few rounds, I was disappointed to discover the new gauge also appeared to be defective. So I figured what the hell, the gun shoots extremely well..I'll just go by the gauge on my hand pump and refill it whenever my zero begins to drift.
Well, I ended reading a post on another forum where someone mentioned his manometer was torqued too tight and after he backed it out a little, it resulted in a functioning gauge. Well sure enough, just yesterday in fact, I decided to give this a go. Shot the gun to empty, removed the gauge, tightened it just finger tight and snugged it up just a little with a wrench. Gauge has been working properly ever since.
I'm wondering if this was the case with the original gauge. Apparently, they don't have to be as tightly torqued as you would think. I filled my gun to 2900 PSI last night and it was still at the same pressure this morning.
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Thanks for the replies. I’ll try that. I just checked again and now it reads 2200. Think I’ll empty it and back it off a bit so it’s not so tight.
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I would do all of the above and replace the Oring. If it has been overtightened it will probably be damaged. You shouldn't need to dry fire to empty if you are going to remove the gauge, just slowly undo it until it stops hissing and then, remove it.
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I just got a used Urban from eBay and found that it wouldn't hold pressure. I could feel the breeze from around the pressure gauge when the compressor was running. Since I didn't have the correct o-ring on hand I tried sealing the pressure gauge threads with teflon tape. This seems to work. I can pump the gun up now and the pressure gauge seems to be registering normal readings. I'm not sure if it is going to hold pressure long term with this fix.
Is this an okay idea? Does anyone have the specs for the o-ring that goes on the pressure gauge?
Is this an okay idea? Does anyone have the specs for the o-ring that goes on the pressure gauge?
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I had this problem with a gamo coyote. Basically the same gun. I took the gauge out, cleaned out the the totally jacked up oring and screwed it back in with nothing on the threads or oring underneath. Sealed to this day.
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I forgot that the oring under the gauge adapter is what holds the fill cover on so I took the gauge and adapter off and rewrapped both parts with teflon tape and put it back together with the o-ring in place. Sealing seems perfect.
Other problems are a dim scope and pellets going all over the place. A new scope helped the visibility problem in my basement 10m range. The accuracy is getting better with more shooting. I don't know if the rifle is changing or I'm learning to shoot better. I also am getting better accuracy if I start at around 2000psi. 10 shots brings the pressure down to 1000 psi.
I don't know anything about the history of this Urban. Are there any other easy changes to get better accuracy? Maybe turn down the power?
I bought a Spritech compressor from Amazon for $179.95. It will take the Urban from 1000psi to 2000psi in about 1 mimute or to 2500psi in about 1 1/2 minutes.. My Yong Heng compressor that I used to have would do it in about 30 seconds but it's another $100 or so and required water cooling.
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Mine is very accurate. Its not pellet picky Except it doesn't like Crosman 14.3gr but I normally shoot those cheap Norma 17.6gr pellets at 800fps. Slow it down some and try a heavier pellet.
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Remove and discard the barrel band. Make sure you have not double loaded pellets and shot the baffles out. My two Urbans are very accurate rifles, one tuned for 22 fpe, the other for 26 fpe, both shoot CPHP well and love the JSB Hades and 18.3 grain heavy. The barrel band is a no go, it does not need it and is detrimental to accuracy.
Use the screw from the barrel band in the trigger, should be able to do a search on that.
Use the screw from the barrel band in the trigger, should be able to do a search on that.
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I would never use teflon tape on a pcp. There are replacement o-rings available for cheap online.
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I 'm trying to find the specs for a replacement o-ring with no success so far. I can get one from Gamo but for now the tape seems to be working great.
I have loosened the barrel band. I took it off of the Urban that I sold a few months ago (bad idea - selling the Urban). I'll take it off completely - thanks for the advice.
The pressure gauge is working great now that the leaks are stopped.
"Use the screw from the barrel band in the trigger, should be able to do a search on that." The trigger on this Urban is pretty nice the way the previous owner had it set up. I probably won't mess with it. I had a CDT trigger on my previous Urban and it was very nice.
I have loosened the barrel band. I took it off of the Urban that I sold a few months ago (bad idea - selling the Urban). I'll take it off completely - thanks for the advice.
The pressure gauge is working great now that the leaks are stopped.
"Use the screw from the barrel band in the trigger, should be able to do a search on that." The trigger on this Urban is pretty nice the way the previous owner had it set up. I probably won't mess with it. I had a CDT trigger on my previous Urban and it was very nice.
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I took off the barrel band and accuracy has improved a lot. I'm leaving the trigger alone for now.
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How many o-rings are in the assembly in front of the air tube? Is there a small one on the pressure gauge and a large one under the gauge adapter? Any others? I'm having a hard time reading the parts diagram. It looks like 9, 11 and 12 on the parts diagram are the required o-rings.
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I've ordered the 3 o-rings from Gamo. The Teflon tape I used is leaking air. I'm losing a few hundred psi per day. My Urban did not have an o-ring on the pressure gauge when I received it.
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