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 Post subject: 2240 not piercing Co2
PostPosted: Mon Sep 09, 2013 3:42 pm 
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Joined: Wed Sep 12, 2012 10:15 pm
Posts: 16
Location: Fraser Valley
Hey all, recently I took out my modded 2240 from a long stint in my sock drawer. I took it apart and oiled inside the valve as it was very dry. Put it back together and tried to shoot it. I chrony'd it and it was getting readings from about 370fps upwards. When i took the co2 cart out I noticed that the hole in it was very small, much smaller than usual. Any ideas why it is doing this? Btw the gun has all stock springs in it and I made sure it wasn't cocked when I put it away a few years ago.


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PostPosted: Mon Sep 09, 2013 4:40 pm 
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Location: Southern Ontario
My 2240's don't leave much of a hole either, but if it's feeding CO2 through, it's working.
I'd suspect dry seals for the lower FPS, but try a couple of powerlets and see if things change...

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PostPosted: Mon Sep 09, 2013 4:43 pm 
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If you are worried about the small hole and think it may be your problem, then just fire 2 or 3 shots without ammo to enlarge the hole. A stronger hammer spring may be needed to get you to the 500 fps mark.

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PostPosted: Mon Sep 09, 2013 4:45 pm 
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Well you said "Modded" so I suspect a weak Hammer spring. That is what punches the valve stem to punch the hole in the CO2. Change out the hammer spring for a stock one and see if that fixes it. Some times new guns take a couple of firing cycles to punch the CO2.

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PostPosted: Mon Sep 09, 2013 5:00 pm 
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Location: Fraser Valley
I've tried dry firing it and it hasn't helped. I may just borrow the hammer spring from my bro's 2289, but that will push it well above 500fps as the gun has a 14.5" barrel and highly modded valve.


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PostPosted: Mon Sep 09, 2013 7:35 pm 
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Location: Waterdown, Ontario
Have you put a drop of crosman oil on the co2 and fired it. Maybe the seal is sticking on the piercing pin.

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PostPosted: Mon Sep 09, 2013 10:10 pm 
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You say it`s modded did you put a trigger stop on it if you did try backing it off a little you might be having some sear drag on your hammer

Jim

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PostPosted: Mon Sep 09, 2013 10:14 pm 
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Joined: Wed Sep 12, 2012 10:15 pm
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Location: Fraser Valley
Thanks all for the suggestions, but I'm going to forget about 12 gram cartridges and just bulk/HPA the gun.


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PostPosted: Tue Sep 10, 2013 12:27 am 
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It could be "soft" topped Co2 caplets- occasionally manufacturers have a few with soft tops and they bend quite a bit before puncturing- are yours flat except for the hole, or is there a significant indent around the hole? If there is an indent, you might want to try some new/different caplets and see if anything changes.

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