Question about Crosman Phantom .177 Caliber Break Barrel Synthetic Stock Air Rifle

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After inserting and compressing the CO2 cartridge, the CO2 leaks

After inserting and compressing the CO2 cartridge into my Crosman model 1077 RepeatAir CO2 pellet rifle, the CO2 leaks out as if a seal is not making up properly. I am using the recommended CO2 cartridges and I tried it 5 times in case the problem was simply a faulty cartridge. Is this something I can fix/replace or should I find a local authorized repair facility. If a professional repair is needed, where can I find one close to me (Baltimore, MD area)?

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  • Anonymous Mar 16, 2014

    needs new seals how do you install?

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  • 6 Answers

You need to check the rubber o-ring seals both in the plug and there could be another up in the gun where the cartridge end meets the inside. If you have a broken o-ring you should be able to find one that fits at your local hardware store or store that sells air rifles. Hope this helps.

Posted on Jul 12, 2009

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1 Answer

My Crosman 1008 Repeat Air pistol leaks all CO2 out


The crosman 1008 does indeed fire pellets! NOT BBs. ONLY pellets.

Feb 03, 2014 | Crosman (4032)

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I have a crosman model 380, .22 cal pellgun that leaks when the co2 is inserted and punctured. I cant see any seal or O-ring at the puncture point. What is missing and how can I fix the problem. Matt


I have the same problem and have dealt with guns for 40 years !
I am glad to see that the other folks have some realistic and innovative ideas of how to remedy this problem.
I went to Lowe\'s on a "tip" and found some very small \'O\' Rings for $ 0.87 for two and I am experimenting with them. The first try I couldn\'t crank the screw down far enough to even puncture the CO2 Cartidge. Using a larger screwdriver I finally managed to puncture the cartidge, unfortunately it still leaked but waas a much smaller leak.

Still experimenting.

I am going on-line to locate the Model 380 Schematic diagram which is where I ran int this site.

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1 Answer

Air leaks out when installing co2


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1 Answer

I have a crOsman model 1077 that wont take a CO2


Probably not by you, but by the shop, maybe. It sounds like the needle was bent and lost it's seal. Crosman has repair stations, if they don't fix it, they will send you another one. I have sent them guns before and got brand new ones instead of the old piece of junk I sent them for repair. They also bought out Sheridan/ Benjamin line of Air rifles, And they repair all those too. I sent them an ancient rifle, an old Benjamin Franklin,17 cal. bare bones stock and barrel only, they sent me back a total refurbish, welded, painted, new .22 cal.barrel, all new guts, unbelievable. I think the total cost was $35 on that one. They wanted $15 for paint, I told them I didn't want it painted, they said, OK, Get a hold of them. Hope this helps.

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1 Answer

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Well that takes me back! I have an old Daisy 1200 -- essentially the same pistol in a different brand.

My Daisy has a hand-turn screw to hold the CO2 cartridge in place, and you have to tighten it quickly until the leaking stops. It does this by pressing the cartridge up against a nylon washer to form a seal (and of course pushing it into the piercing pin to get the CO2 out!)

With age, I'd expect that nylon washer to get stiff or crack, making it harder to form a good seal. You don't need an exact replacement part, but if that's happened to yours then you will need to replace it with something more-or-less the same size as the original.

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I would send it of to fix, playing with compressed gas is dangerous, sound like a seal my have corroded.

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Some fire BB's and some fire pellets.
Wear protective eye wear and clothing and always fire down range never point any pistol at anyone when handling it keep your fingers off the trigger and point up or down range.
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