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Old 10-10-2012, 04:27 PM   #1 (permalink)
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Join Date: May 2012

t9.1 leak

My t9.1 is leaking out of the reg and I don't have any experience teching Tiberius guns, any suggestions on how to fix the leak?
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Old 10-10-2012, 04:48 PM   #2 (permalink)
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The 9.1 reg is designed to vent if the pressure rises above what you've set the reg to.

It does this via a small o-ring/screw located in the center of the spring piston (which is visible through the regulator/velocity adjustment nut.

Some basic diagnosis questions:
What's your air source (Co2, 12gr, HPA @850PSI, etc)?

If it's the pressure relief screw, it's not really meant for adjustment but, you can try turning it in (it's a small allen screw accessible through the regulator adjustment nut) but, doing so can disable the overpressure protection if not done properly (which is less of a concern if you're using a fixed output HPA tank).

The best way to do it, is to tighten it fully, go to the chrono, adjust your velocity to 280 (or appropriate FPS). then start backing out the relief screw until it starts leaking slightly. Once it does, give it a 1/4-1/2 turn back in.

If that doesn't fix it, it may be the oring on the spring piston.
Degas the marker
Disassemble the marker (Check the videos in the Useful Resources thread)
Disassembled the reg and inspect the piston o-ring.
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Old 10-10-2012, 06:40 PM   #3 (permalink)
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I'll try that but I'm not sure it'll fix it because it dumps the whole mag (or tank if I'm using asa) Maybe I just gotta replace some orings, I'll order some and see how that works.
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Old 10-10-2012, 11:20 PM   #4 (permalink)
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Use the Useful References that are stickied in this forum or in the link in my sig, that'll give you all the diagrams and videos you need. If you need help with it still shoot me a message and I'll try to help you with it as much as I can.


Wait, is it a leak or dumping? Dumping means you probably dont have it assembled properly or an oring is just straight up missing.
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