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Bsa R10 Mk2 No Pressure Reading... Help

Discussion in 'Technical' started by J30krk, Sep 19, 2019.

  1. J30krk

    J30krk Member

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    Hello I am new to this forum and new to the world of pcp.

    I own a bsa r10 mk2, the gun has been sitting a while and when I went to charge it the bottle shows 150 but the pressure gauge on the gun shows nothing. When I fill the gun it will not go above 150 on the bottle reading either. I took the gun out last night and killed a few rabbits so I am assuming it still shoots fine and does hold pressure, I know the rifle is due a service so I am going to buy a service kit and replace the seals. The problem is I don’t know if this is the result of a broken part ? Ie pressure gauge, the gun was functioning perfectly last time I used it but as I said it has been sitting a while.....

    Can anyone please help me
     
  2. Thewelshwonder

    Thewelshwonder Busy Member

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    Hi, if it’s not going above 150 then that’s all that’s in you charging bottle, as for the rifle gauge it’s obviously faulty
     
    sharpsman and J30krk like this.
  3. no country members

    no country members Tooled up tool

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    Yep I'd say as per @Thewelshwonder response you have a failed gauge (£15 to buy tops) and the 150 max fill is not connected and just means that's all that's left in the bottle at the moment. If you have a best fittings blank plug you can easily test the residual pressure in your bottle (just remember to use the bleed before removing the plug!).
     
    J30krk likes this.
  4. no country members

    no country members Tooled up tool

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    You could still use your rifle in the short term without a working onboard gauge (some early PCPs didn't even have gauges iirc).
     
    J30krk likes this.
  5. J30krk

    J30krk Member

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    Thank you. Here’s the next question is there a reason it won’t go above 150 ? I open the bottle up, it goes to 150 on the bottle but won’t increase above that ? Cheers

    Sorry for the boob questions I am new to this
     
  6. no country members

    no country members Tooled up tool

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    Yep we've told you this already above matey.
     
    J30krk likes this.
  7. no country members

    no country members Tooled up tool

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    A bottle gets filled to either 230 or 300 Bar depending on type. Then each fill of your gun takes a small volume of air out of it and reduces the pressure slightly.

    I have a 7 litre 300 Bar bottle and typically fill 2 rifles every few weeks. When my bottle drops below 200 Bar I think about getting it topped up to 300 again. This happens 2 to 3 times a year for me but obviously depends on how much shooting you actually do.
     
    Tim_B and J30krk like this.
  8. J30krk

    J30krk Member

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    Thank You bud. I was just paranoid there was another broken part in there that wasn’t allowing my gun to fill above 150. So I’ll get a service kit, my diver bottle refilled and a new gauge. Thank you for the answer, you have saved me a lot more googling
     
    Tim_B likes this.
  9. J30krk

    J30krk Member

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    Thank you everyone
     
  10. no country members

    no country members Tooled up tool

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    Welcome to the best Airgun Forum in the world by the way!
     
    markturver and J30krk like this.
  11. sagalout

    sagalout What a plinker!

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    As said you dive cylinder is at 150 so it can't supply air above that!

    As for you gun gauge I have had a none functioning gauge and the problem was the gauge was over tight crushing the sealing o ring and blocking the gauge port. Loosened it of a bit and all worked fine.
     
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  12. no country members

    no country members Tooled up tool

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    Personally I would not fix what isn't broken.

    I would just sort the gauge get your bottle filled and see how it goes from there. There is plenty of time for preventative maintenance later once you've got it back to where it should be.

    If you start meddling in more than one area at a time it can become more difficult to troubleshoot problems and identify specific issues.

    Others may disagree (but I am right :D).

    Good luck bud!
     
    sagalout and J30krk like this.
  13. J30krk

    J30krk Member

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    What an amazing forum btw. I honestly did not expect such a good result so quickly
     
  14. Patrick

    Patrick Donator

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    Yep i'd agree with No Country if it ain't broke don't fix it. Just replace the gauge and get you bottle/cylinder topped up. In the meantime if the gun has got 150 Bar in it that should give you enough for about 40-5- shots depending on calibre.
    Please don't take this the wrong way but as for servicing the gun are you sure that's wise for you to do as from your original post you you appert to have little or no experience of pcp air rifles and unless you know exactly what you're doing it may be unwise to do so. Tinkering with a pcp with no knowledge of them is a recipe for disaster and possibly dangerous considering the extremely high pressure involved.
    We'd hate to think that you membership on this forum and possibly your life or well being was brought to an abrupt end.;):oops:
     
    Last edited: Sep 19, 2019
    J30krk likes this.
  15. J30krk

    J30krk Member

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    thank you for the concern bud, I service fire extinguishers as part of my job at work just wasn’t sure if there was some stupid part that could have faulted and caused this. so I would like to hope that I wouldn’t die in a pressure related incident (hope) as for the gun working again that’s a different matter I have no idea how much a gun smith would take for a service, I’m usually quite handy, if there was a guide and just a changing of o rings I should be ok (I hope). I will follow the advise from all you experienced individuals and fix what’s broke that sounds by far the best. Thanks again
     
  16. TR158

    TR158 Keyboard Hero

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    Its usually due to the onboard gauge / manometer being screwed in too firmly and crushing the oring. You'll need to remove the action from the stock and try unscrewing the gauge about a quarter to half turn to see if it springs to life. It could also be that the oring needs replacing. Be careful not to unscrew the gauge too much as it will be under pressure and could shoot out at great speed!

    If you do need to change the washed you'll need to drain and remove the buddy bottle before proceeding. If none of that works, new gauge and oring :thumb:
     
    cloverleaf, J30krk and sagalout like this.
  17. sagalout

    sagalout What a plinker!

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    @J30krk there are some top videos on youtube by XTX air on stripping/rebuilding BSAs, give them a good coat of looking at before you start.
     
    J30krk likes this.
  18. markturver

    markturver Well-Known Member

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    Beat me to it : had a few gauges fail to read because they had been wanged in way too tight, closing feed hole off.

    .
     
    J30krk likes this.
  19. robs5230

    robs5230 Oversprung

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    As said above.
    Remove stock, and find a spanner that fits the flats of the gauge.
    Loosen carefully unti you start to hear air escaping. Nip back up to the point where air stops escaping and no further.
    Safe to do.
     
    J30krk likes this.
  20. J30krk

    J30krk Member

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    Honestly thank you everyone
     
    TR158, cloverleaf and Marcus Iddon like this.

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