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PCP filling problems

Discussion in 'Anything Airgun Related' started by Tang, Aug 21, 2014.

  1. Tang

    Tang Active Member

    Messages:
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    Location:
    Worcestershire
    Hi all, think I am doing something daft as I can't seem to fill my reservoir. I plug the nozzle in and turn the cylinder valve slowly (not straight to 200 psi). The pressure on the gauge will hold wherever I set the valve as though it's hitting a dead end. I would expect to see it dropping as it took the air. I tried to shoot it today and you can see the pellet drop in the scope and it sounds as flat as a f*rt. Any ideas?


    [​IMG]
     
  2. cloverleaf

    cloverleaf Honorary Member

    Messages:
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    Location:
    Oxfordshire
    Have you overfilled the rifle in the past? What's the pressure gauge on the rifle saying?

    In other news, how's the hose attached to the air cylinder? Not seen owt like that before and it looks like a bit of a lash-up to me..
     
  3. RichieRich

    RichieRich Ping!

    Messages:
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    Location:
    County Durham
    Check the gauge on the gun, it's likely you may have over-filled it and the hammer is unable to overcome the higher pressure on the valve spring in the reservoir (resulting in low powered shots)
     
  4. Tang

    Tang Active Member

    Messages:
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    Location:
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    I've never filled it before, the guy down the road did with his bottle the first time. There isn't a gauge on the gun. How do I check if I've over filled it and if so resolve it.

    The hose is fitted to the cylinder with a high pressure coil type hose and t piece. Means I can leave the bottle secured to the wall and fill the gun with the long hose.
     
  5. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

    Messages:
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    Location:
    St. Andrews, Jockland.
    Try dry firing until empty, and start again:)
     
  6. mattyts

    mattyts Donator

    Messages:
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    Location:
    Yorkshire
    What gun is it? If you dry fire 30 shots or so then take some shots,with the pellet in you should notice an increase in power :)
     
  7. Tang

    Tang Active Member

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    It's a scorpion. Thanks for the replies I will give that a go later
     
  8. Tang

    Tang Active Member

    Messages:
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    Location:
    Worcestershire
    Fired it dry but still no good. Decided to strip the filling port this evening. Think I may have found the problem but not 100%. When I took the valve apart the little ball bearing was stuck hard in the seal, had to give it a harder tap than the you tube video to get it out. I think the ball bearing is going through the seal rather than sitting in it. Anyway I put the filling valve back together and plugged the filling adapter to it. I let it have air very slowly and the ball bearing wasn't opening to nearly 150 psi. Put it all together and still no good. I will see if I can get a new seal tomorrow. Any other ideas?
     
  9. jantar

    jantar Donator

    Messages:
    886
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    Location:
    Whetstone, Leicesterhire
    First time you fill a pcp from new with air you should pull the cocking bolt or sidelever back to open the valve seat which relieves any excess pressure being put on on the valve seat. This only applies to the very first initial fill. After that to topup start with a slow and steady one with the bolt/lever in its closed position and with cold air to get the maximum fill. Never fill beyond the recommended pressure which is displayed on the weapon.
    Hope that is of some use but it seems that the damage has been done. As you say that it only give s lowly phut the only other suggestion is to use a different hose in case the interior has collapsed or take it to a range and have them try to fill it.
    Good luck with that problem.:confused:
     
  10. Tang

    Tang Active Member

    Messages:
    40
    Likes Received:
    0
    Location:
    Worcestershire
    Thanks for the help and replies, however after another day of tinkering I think I've got to admit defeat. I will have to phone BSA Tuesday and see how much it will cost to send it for repair and service.
     

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