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Water / condensation in gauge?

Discussion in 'Anything Airgun Related' started by Tatts, Jun 1, 2015.

  1. Tatts

    Tatts Posting Addict

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    What's the quickest and easiest way to sort this? I bought a cylinder that I was told leaked out of the fill probe and if you left a dust cap in it, it was difficult to remove as it became pressurised. I drained it off and filled with a bottle hoping it would reseat the washer. I put in a jug of water and nothing. I have left it fully charged for 3 days with a dust plug, it wasn't pressurised and didn't lose any pressure so I'm guessing it's not leaking.
    The problem I have now is a gauge that is steamed up :(

    [​IMG]
     
  2. mick 1986

    mick 1986 Keyboard Hero

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    Really, you should empty it, and strip it. Drying everything as you go. Then refill.
     
  3. oliver13

    oliver13 Donator

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    The area that's steamed up is separate to the pressurised system so you don't necessarily have a water problem inside the gun.
    You need to strip down the gauge & dry it, but I don't know how strippable those little gauges are. Try to back off the outer sleeve at least until the front lens is loose then put it into a bag of dried rice for a week.
    While it's out you need to double check there's no water actually in the compression tube, or the valve assembly & regulator if you've got one fitted - I'd gues not, but I'd definitely make sure.
     
  4. Tatts

    Tatts Posting Addict

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    I used it in the gun a few times before tuning my 100 and there was definitely no water in the gun and when I drain the cylinder no water comes out so I'm guessing it's just the gauge (which looks to be seperate) but sure if/how to remove it.
     
  5. oliver13

    oliver13 Donator

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    In retrospect, looking at the photos, is that a separate cover over the gauge? Maybe there isn't anything in the gauge itself, you've got condensation inside double glazing....
     
  6. Tatts

    Tatts Posting Addict

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    Yes it's just in the outer cover. I'm guessing the seal wasn't the best as when I did it it had 3 water droplets in it, I left it somewhere warm for the last 2 days and it's turned into condensation.
     
  7. RichieRich

    RichieRich Ping!

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    The gauge is separate to the cover. It's likely that the previous owner has had it in the rain, or popped that end of the cylinder in water to check for leaks.

    The gauge is removeable, but requires that end of the cylinder to be unscrewed from the tube first. Removal of the gauge is then accessible by the allen key hole in the gauge stem from the inside (what would be the pressurised end) the endcap.

    You can get replacement covers, and they just press-fit into the endcap. Unfortunately i don't know how to remove the gauge cover, but you could try if you have a small suction cup small enough to cover it, then pull it from the endcap.
     
  8. mick 1986

    mick 1986 Keyboard Hero

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    If the gauge is separate, I would still remove the pressure before messing with it. Then remove the front cover and stick the gauge in some desiccant. One of the small silica gel packs will get rid of that moisture in a couple of hours.
     
  9. mick 1986

    mick 1986 Keyboard Hero

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    If it's got in from something you have done, like stick it in water to leak test, then cover the gauge with several sachets of the silica gel. That will draw the moisture out of the gauge.
     
  10. Tatts

    Tatts Posting Addict

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    lol no one read my post :p:D It came free with my gun as it was leaking so I put the gauge end in a jug of water to find no leak.
     
  11. terry1001

    terry1001 Major Poster

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    Water wouldn't get into a pressurised cylinder but the gauge is at atmosheric pessure so water could seep in. You might get rid of most of it by putting it into rice or silica gel in a warm place for as long as you can manage but I think it's unlikely that you'll get it all out. If the gauge front cover is plastic you could drill a small (1mm) hole in it before trying to dry it and then seal the hole with silicone or similar. When you're doing this keep it gauge down in the drying agent to stop any water getting into the works, it's not going to do any harm but it does make reading the gauge a bit difficult.
     
  12. Tatts

    Tatts Posting Addict

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    Nice one. I'm going away for 3 weeks on thursday so I will leave it in some rice while I'm gone. I emptied all the air out and it seems dry to me, I'll put some back in it before I leave it?
    I can't find any info on removing the plastic cover except for removing the gauge itself which involves stripping the cylinder. A new gauge is £75 so I would like to avoid this :p
     
  13. Tatts

    Tatts Posting Addict

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    Finally got back yesterday and the gauge is dry. Bad news is there was only 50 bar in it when I left it with 100. No problem, filled it to 100 bar again last night before bed and it's down to 60 bar this morning and I can hear air coming out from were the fill probe goes :confused:
     
  14. RichieRich

    RichieRich Ping!

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    If you have the de-gas tool, empty it, and then give it a short quick blast of air. Hopefully this will dislodge whatever is causing it to leak. Worth a try, but must be done from empty just incase of accidental overfilling when you do this
     
  15. Tatts

    Tatts Posting Addict

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    Already emptied it but don't have access to a bottle until wednesday. Is it easy to change the seal in there? It's been treated roughly which is clear to see (grooves from the fill probe) and as it is tempramental (leaks then doesn't then does etc) so I am guessing it will happen again.
     
  16. RichieRich

    RichieRich Ping!

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    I'm not sure i'm afraid, never done one before. There was a guide on HW100Tuning.co.uk but it requires a password to access it unfortunately. It involves using a 36mm socket to remove the valve end, and an 8mm bar to remove the filler end.
     

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