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Old 10-27-2014, 11:43 AM #1
MAster_Dekoy
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Geo 2.1 strange leak

Hello. I am having a strange problem with a friends geo 2.1. Usually I am able to figure these things out.

The gun cycles fine but has a leak down the barrel. I tried replacing all o-rings which didn't fix the problem. So i tried other orings with no luck. Specifically, since the leak was down the barrel, I test fit the inside can oring, the 14x2 on the prop shaft, and the bolt sail to ensure they were getting a good seal. Also checked and replaced the 2 large ones on the outside of the can.

The gun was fully torn down and cleaned, and it doesn't leak with a core out of a different gun, so I believe the problem is in the can, bolt, or prop shaft of this gun. I tried subbing in one part at a time from the working core. However the gun would not stop leaking with any combination of the working / unworking parts. Only when the whole core was swapped out did the leak disappear.

I know this is a lot of info. Hopefully it makes sense. Anyone have any ideas?
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Old 10-27-2014, 11:56 AM #2
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What cores specifically?
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Old 10-27-2014, 05:21 PM #3
MAster_Dekoy
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2.1 core that leaks, 2.1 core that works
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Old 10-27-2014, 06:55 PM #4
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if you are allowed try swapping all orings from the working Drive train to the non-working Drive train and see if that stops the leak (will diagnose whether its an oring issue or a tolerance issue)

do you know if the broken DT has been changed in anyway (pooty polished for instance)

its extremly rare for a drivetrain of any gun to lose tolerance beyond what orings can seal (causing leaks) so id say its an oring issue.

did you change the orings on the outside of the can ?
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Old 10-27-2014, 08:31 PM #5
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ya changed all those. I'll try swapping the o-rings from the working drivetrain, thats a good idea

as far as i know, the bolt isn't polished. It doesn't look polished. dunno what other modifications could be done...
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Old Yesterday, 01:07 PM #6
SMDP#15
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Is there excessive grease? Geos will leak slightly but still cycle if they have even just a tad too much grease.
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Old Yesterday, 08:52 PM #7
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Tried with lots of grease, tried with little grease. No luck.
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