GTA
All Springer/NP/PCP Air Gun Discussion General => "Bob and Lloyds Workshop" => Topic started by: Desert Drifter on September 09, 2022, 01:00:44 PM
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Along time ago, maybe 20 years or so, I purchased a new Crosman 2250XL carbine. It takes the 88 gram screw in cartridge. It is a nice kit and came with 4x32 scope ready to shoot. I am no stranger to air guns. Here is my problem. From the very first 88 g. cartridge I placed in the port at the rear of the pistol it leaked and hissed loudly until it was empty. I placed the drop of Pel-oil on the tip. I tried it again, this time being certain that I screwed it completely in and tight. Same results. After burning through a six pack of expensive 88 gram CO2 bottles. I put the 2250 back in its box and placed it up in the rafters of the garage.
It has all the makings of a fine project. Steel breech, frame/trigger assembly, stock and barrel. Only thing that needs changed out it the main tube. The existing main tube has the assembly and strut for the 88 gram. The strut is attached to the main tube with screws. If the strut is removed it would not hold any pressure. The question I have is to confirm the only thing I need to find is the main tube for a 2240 and parts and replace the existing main tube.
Your comments will be very much appreciated.
Thank you.
Desert Drifterr
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Can you post a picture?
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Joe, I've never used an 88 or 90 gram cartridge, but I've read that they sometimes send little bits of metal into the valve that causes trouble as you have described.
You may need to disassemble the valve to clean it out. You may also need new seals from Crosman.
Then you can just buy an adapter to use 12 gram cartridges.
Amazon search this:
"12 gram to 88 gram co2 adapter"
You will find several like this:
https://www.amazon.com/sspa/click?ie=UTF8&spc=MTo1NTI3ODAxODQ4OTIyNDA0OjE2NjI3NDAzNDY6c3BfcGhvbmVfc2VhcmNoX2F0ZjoyMDAwNjM2Njc3MDY5NzE6OjA6Og&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&url=%2FCPROSP-Adapter-Anti-air-Leakage-Gaskets%2Fdp%2FB08R8K1L3N%2Fref%3Dmp_s_a_1_2_sspa%3Fcrid%3D1MIYFY65YBD4U%26keywords%3D12%2Bgram%2Bto%2B88%2Bgram%2Bco2%2Badapter%26qid%3D1662740346%26sprefix%3Dco2%2B88%2Bgram%2Bto%2B12%252Caps%252C166%26sr%3D8-2-spons%26psc%3D1 (https://www.amazon.com/sspa/click?ie=UTF8&spc=MTo1NTI3ODAxODQ4OTIyNDA0OjE2NjI3NDAzNDY6c3BfcGhvbmVfc2VhcmNoX2F0ZjoyMDAwNjM2Njc3MDY5NzE6OjA6Og&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&url=%2FCPROSP-Adapter-Anti-air-Leakage-Gaskets%2Fdp%2FB08R8K1L3N%2Fref%3Dmp_s_a_1_2_sspa%3Fcrid%3D1MIYFY65YBD4U%26keywords%3D12%2Bgram%2Bto%2B88%2Bgram%2Bco2%2Badapter%26qid%3D1662740346%26sprefix%3Dco2%2B88%2Bgram%2Bto%2B12%252Caps%252C166%26sr%3D8-2-spons%26psc%3D1)
Hunter
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Joe, I've never used an 88 or 90 gram cartridge, but I've read that they sometimes send little bits of metal into the valve that causes trouble as you have described.
You may need to disassemble the valve to clean it out. You may also need new seals from Crosman.
Then you can just buy an adapter to use 12 gram cartridges.
Amazon search this:
"12 gram to 88 gram co2 adapter"
You will find several like this:
https://www.amazon.com/sspa/click?ie=UTF8&spc=MTo1NTI3ODAxODQ4OTIyNDA0OjE2NjI3NDAzNDY6c3BfcGhvbmVfc2VhcmNoX2F0ZjoyMDAwNjM2Njc3MDY5NzE6OjA6Og&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&url=%2FCPROSP-Adapter-Anti-air-Leakage-Gaskets%2Fdp%2FB08R8K1L3N%2Fref%3Dmp_s_a_1_2_sspa%3Fcrid%3D1MIYFY65YBD4U%26keywords%3D12%2Bgram%2Bto%2B88%2Bgram%2Bco2%2Badapter%26qid%3D1662740346%26sprefix%3Dco2%2B88%2Bgram%2Bto%2B12%252Caps%252C166%26sr%3D8-2-spons%26psc%3D1 (https://www.amazon.com/sspa/click?ie=UTF8&spc=MTo1NTI3ODAxODQ4OTIyNDA0OjE2NjI3NDAzNDY6c3BfcGhvbmVfc2VhcmNoX2F0ZjoyMDAwNjM2Njc3MDY5NzE6OjA6Og&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&url=%2FCPROSP-Adapter-Anti-air-Leakage-Gaskets%2Fdp%2FB08R8K1L3N%2Fref%3Dmp_s_a_1_2_sspa%3Fcrid%3D1MIYFY65YBD4U%26keywords%3D12%2Bgram%2Bto%2B88%2Bgram%2Bco2%2Badapter%26qid%3D1662740346%26sprefix%3Dco2%2B88%2Bgram%2Bto%2B12%252Caps%252C166%26sr%3D8-2-spons%26psc%3D1)
Hunter
This /\ /\ /\
This will be a much cheaper way to troubleshoot your issue. Those 88g carts are very expensive these days. I used the 88g to Paintball adapter and tried it in my QB79. Leaked. I fixed it and used a few more over time with great success. Those Crosman pistols configured that way are VERY cool.
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I took a few pictures. I could load the file into the attach:, but that is as far as I got. I can't place the file into this message box. And I no longer have an online picture hosting service.
Joe
I have no idea why this worked.
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Yes, you could replace the tube need to look at the valve also, may need a new one for the striker to pierce the cart, have never had one of those apart so im not sure
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I have located a complete main tube. I think it will be just a remove and replace sort of action. I'll stand by for a day or so before I order it. I want to go to the 12 gram. I do not shoot enough to warrant 88 grams of CO2. It might take me a year to utilize that much air.
Joe
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I have located a complete main tube. I think it will be just a remove and replace sort of action. I'll stand by for a day or so before I order it. I want to go to the 12 gram. I do not shoot enough to warrant 88 grams of CO2. It might take me a year to utilize that much air.
Joe
Sounds lile a good option, then you can reseal the original so that you could swap back if you wanted to at a later date
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What you have is sometimes referred to as the RatCatcher or King RatCatcher.
Cool guns but they are notorious for leaking.
I would try replacing the seals in the exterior transfer tube first.
You can get an 88 gram to 12 gram co2 adapter on ebay for about $15.
https://www.ebay.com/itm/184442750768?epid=1377069788&hash=item2af1a50730:g:1n4AAOSwG5JfWy12&amdata=enc%3AAQAHAAAAoIOH8lDVok0WhO8nrIjGRJDF2zen8lGbx39gWauB2FL5XeYyBBTcnYOIPBE7aCNAz73x%2FpwEPf6%2BZkVPmPKKT6ZIwEtkC6tl8Oo2lgeViZ7nIztM%2FdnzqHm10mfMcbsvkaSROS3dd%2Fob52HEDvVaWEF2afUl2GUS89HrDximrdVtIODqAvP3%2FiLp%2FEUkl7i4%2FxfqaGW57%2FVCdLMnLkjomCE%3D%7Ctkp%3ABk9SR5Tv3rnkYA (https://www.ebay.com/itm/184442750768?epid=1377069788&hash=item2af1a50730:g:1n4AAOSwG5JfWy12&amdata=enc%3AAQAHAAAAoIOH8lDVok0WhO8nrIjGRJDF2zen8lGbx39gWauB2FL5XeYyBBTcnYOIPBE7aCNAz73x%2FpwEPf6%2BZkVPmPKKT6ZIwEtkC6tl8Oo2lgeViZ7nIztM%2FdnzqHm10mfMcbsvkaSROS3dd%2Fob52HEDvVaWEF2afUl2GUS89HrDximrdVtIODqAvP3%2FiLp%2FEUkl7i4%2FxfqaGW57%2FVCdLMnLkjomCE%3D%7Ctkp%3ABk9SR5Tv3rnkYA)
Made a King RatCatcher from a 2240 tube and it works great.
Uses a 13 ci regulated PCP tank.
https://www.gatewaytoairguns.org/GTA/index.php?topic=177787.msg156040615#msg156040615 (https://www.gatewaytoairguns.org/GTA/index.php?topic=177787.msg156040615#msg156040615)
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Thank you for your comments. Much appreciated.
I've been going back and forth examining the AS2250XT. What I thought was just a safety strut is a gas transfer tube from the 88 gram connector to the normal 12 gram cartridge main tube. That way the trigger and striker would work normally without modifications. I removed the threaded plug on the front of the main tube and looked inside. I could see where the gas transfer tube port enters into the chamber. Then I had a "Ah Ha" moment. I noticed there was no o-ring on the threads of the plug like there is on the same plug on my Crosman 150 (which holds pressure for months). I am certain I have never removed that plug before.
It is possible it was omitted during manufacturing. I think that might be the simple problem all along. The gas from 88 would just leak past the threads of plug. I'll take the plug down to the hardware store and find an o-ring and give it a try. It will only cost me the price of an o-ring and $10 +/- for 88 gram cartridge. I can see where there could be problems all along the connections of the gas transfer tube if it was not just right.
I'll report back.
Joe
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I believe that the "strut" feeds CO2 into the side of the valve, which is drilled and tapped for that purpose.... I am pretty sure that the 2250 uses a different valve, and would be required to run a 12 gr. in the main tube.... Whether any other parts are different and/or required I don't know....
A missing O-ring could definitely be the problem.... Good luck....
Bob
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Thank you for your comments. Much appreciated.
I've been going back and forth examining the AS2250XT. What I thought was just a safety strut is a gas transfer tube from the 88 gram connector to the normal 12 gram cartridge main tube. That way the trigger and striker would work normally without modifications. I removed the threaded plug on the front of the main tube and looked inside. I could see where the gas transfer tube port enters into the chamber. Then I had a "Ah Ha" moment. I noticed there was no o-ring on the threads of the plug like there is on the same plug on my Crosman 150 (which holds pressure for months). I am certain I have never removed that plug before.
It is possible it was omitted during manufacturing. I think that might be the simple problem all along. The gas from 88 would just leak past the threads of plug. I'll take the plug down to the hardware store and find an o-ring and give it a try. It will only cost me the price of an o-ring and $10 +/- for 88 gram cartridge. I can see where there could be problems all along the connections of the gas transfer tube if it was not just right.
I'll report back.
Joe
The tube itself is not pressurized, only the valve so no seal required on the tube cap.
The transfer tube pressurizes the valve which is sealed with a top cap.
The transfer tube ends are secured with a screw which compresses o-rings.
That's usually where the leaks occur.
Not the best design but it is what it is.
Replace the seals on the transfer tube and you should be good to go.
The other problem area is where the CO2 bottle attaches.
There is a seal in there that may need to be replaced.
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If you would like perhaps we could trade a regular 22xx CO2 valve and standard rear cap, or maybe a power adjuster for the now un-needed parts when you convert to a standard 12 gram CO2 cart 2240 or 2250 tube
PM if interested.
Casey
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Finally, I have assembled all the parts to make the transition. I have learned a lot on the 22XX family. I do not know if I have an issue with the safety. I did not remove the trigger plate off of the grip frame so the safety should be intact. What concerns me is it moves effortless back and forth through the grip frame. Seems like I should feel the resistance of the spring. I cannot see how the spring and ball could get out. I'll know for sure when I get it all back together.
Joe
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Finally, I have assembled all the parts to make the transition. I have learned a lot on the 22XX family. I do not know if I have an issue with the safety. I did not remove the trigger plate off of the grip frame so the safety should be intact. What concerns me is it moves effortless back and forth through the grip frame. Seems like I should feel the resistance of the spring. I cannot see how the spring and ball could get out. I'll know for sure when I get it all back together.
Joe
The ball and spring combo would launch itself if you separate the tube from the trigger frame assembly.
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I suspect you no longer have the ball or both.
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That is exactly what I was afraid of. I looked all around my work area, search with strong magnet and never found anything. Suspecting the worse I ordered replacement springs and balls. I'm set back a few more days.
Thanks for informing me.
Joe
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Glue them together.
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That sounds like a good plan. I'll do that!
Joe
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Finally, after waiting 10 days for a safety spring and ball I was able to finish the conversion. It has held full pressure for over 24 hours now and is good to go.
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Next time put a dollop of silicone grease on the tiny spring and ball to keep them in place.