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farrlarr · Member

I recently purchased a Crosman 2240 and, while reading the instruction sheet, was struck by their insistence that a CO2 cartridge should not be left in the gun after shooting is done. I have a TF 78 in which I have left cartridges in all stages of fill and which has suffered no problems, as far as I can tell. Is Crosman's instruction simply a legalistic way of trying to assure that their guns are not in firing condition should someone pick them up randomly or is there really a good reason for not leaving a partially filled, or even full, cartridge in the pistol?

Second question: I am already thinking about modifying the 2240. What are good sources of parts, beyond the very few offered by Crosman?

Alstone · Moderator & Site Supporter

A lot depends on the type of seal used on the gun to seal the Co2 capsule, on a 2240 it’s a compression seal and if the capsule is left in for to long the seal takes time to reform, but I regularly leave capsule’s in my 2240 for up to a month without any problem, just make sure you put a drop of lubricant on the tip of the capsule before inserting, this will help to stop the co2 from drying out the seal, I use silicon oil but Crosman make there own Pellgunoil.

Al

Slavia · Moderator

This kind of question comes up every once in a while. The only logical explanation that I've seen is that in some guns, the hammer rests on the valve, holding it open, and creating a pathway for contaminants to enter during prolonged storage. The answer in those cases is to store the gun with a little pressure to keep the valve closed.

Alstone's advice is good - I think you will be fine either way. I store my 2240 without the capsule, but only because I usually shoot the capsule empty in one session.

farrlarr · Member

Thanks for the input about storage.

Any suggestions for sources of parts for the 2240?

under500fps · Veteran Member

Mark5043 · Silver Status Member

I think Crosman recommends storing an empty gun for safety reasons mostly.I've never had any issues.I use a drop of Pellgun oil on every cart though.Seals are cheap anyway....I got tired of loading a fresh cart every time while out pesting.I just had my 2300KT apart for it's yearly inspection,and all seals are fresh...