That eliminates the on-off area. Replace the powertube oring. If you don't have one, swap it with the one around the bottom of the on-off assembly.
Classic Chuff/PumpMag Problem
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I made the swap but it still leaked every time I lift off the trigger or the gun wasnt cocked. I think I am going to get some spacers and a rebuild kit for the valve.Comment
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Now for an updated,
I installed a new reg seat again, seems like the one I had went bad, pt oring, on/off oring and also a .220 spacer. It has a new main spring as well. Gun works perfectly in mech mode, but when I install the pump kit it seems to still be capable of shooting without me stroking it. Not saying it doesn't try to resist the urge to not shoot, and provide me with some chuffs, but it still allows the bolt to blow forward on occasion without me having stroking it before each shot. It shoots the best when I pump it, but I can also get away with squeezing the trigger again to make it go off which is defeating the purpose of the pump. No leaks anymore, just the gun being able to shoot when it is not suppose to. I'm thinking it is the wave spring that is giving me the trouble. I also have the bumper cut to fit inside the wave spring like the link Ando posted.Last edited by LinearGoose; 08-11-2010, 05:01 PM. Reason: Clarification on what was installed on the valveComment
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One of 2 things. It's either a warn wave spring or your bolt spring is doing it's job. It's best to use a worn bolt spring with a pump mag. Use your old spring you had in before. If it's still doing it you might have a worn wave spring. You could also try using a full bumper instead of a cut one but the pump stroke might be a little hard so you might be looking at getting a new wave spring if all else fails.Last edited by Ando; 08-11-2010, 04:03 PM.Comment
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Installed an older and shorter main spring, works perfectly now. God I love mags... Thanks guys for the tech support. Any idea on where I can get some more wave springs for future reference?Comment
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Sweet I'll give him a holler pretty soon.
Now for a picture of the finish product:

Cant stop showing it offLast edited by LinearGoose; 08-11-2010, 05:02 PM.Comment


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