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Old 07-26-2006, 12:01 PM   #1 (permalink)
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Ok so I picked this beast up. it's a minimag, with a pump kit. So it leaked when I got it and I replaced the O-rings, put her back together and now it's all messed up.

Here's the deal, I pressurize it shoot no problem then I take the tank off and the trouble starts. the on/off pin is sticking in and holding pressure.

Please help I don't know what is causing this or how to fix the problem
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Old 07-26-2006, 12:19 PM   #2 (permalink)
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take the wave spring out, and shoot it in semi for a while to work in the o rings. It sounds like your on/off is just too sticky. Sometimes you need to work new o-rings in.
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Old 07-26-2006, 12:26 PM   #3 (permalink)
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Also forgot to ask... what preasure are you running into the mag? co2 or nitrogen?
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Old 07-26-2006, 01:20 PM   #4 (permalink)
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running CO2 right now
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Old 07-26-2006, 01:45 PM   #5 (permalink)
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That is a common problem with Mags. As Knightmare stated you may need to break in the orings. Seeing that I still have the same issue on my classic mags and I know the orings are broken in, you can do what I have found that works. When you go to remove your tank, hold the trigger in. While holding the trigger in, unscrew your tank and depressurize your Mag. This will empty the dump chamber and close the on/off so no more air will pass through it to pressurize it.
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Old 07-26-2006, 01:50 PM   #6 (permalink)
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Thanks alot for the help guys I really appreciate it
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Old 07-26-2006, 06:30 PM   #7 (permalink)
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Just pulling the trigger doesn't get it to release?

Most of my mags do this occasionally, but pulling the trigger dumps the on/off forward.
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Old 07-27-2006, 03:39 PM   #8 (permalink)
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no the on/off is sticking in not out
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Old 07-27-2006, 03:51 PM   #9 (permalink)
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I could always be wrong but I think if you hold the trigger in while you unscrew the tank it causes air to be stored in the dump chamber.

durring a cycle the bolt returns when the air in the chamber is no longer at a high enough pressure to keep the bolt forward so the bolt comes back and reseals on the power tube o-ring. the air can't escape out the power tube because of the bolt and the on/off would be closed so it would be traped on both sides.

I think with a Pmag setup the wave spring still lets the bolt come back far enough to seal in the power tube but keeps it far enough forward that the sear cannot let the on/off open again so the air is trapped.

try cocking it and then degassing while it is cocked then when the air drains pull the trigger to releave the pressure on the wave spring.
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Old 07-27-2006, 10:00 PM   #10 (permalink)
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ok I'll try this stuff ASAP thanks for the help guys I'll let you know how it goes by the end of the week
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