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Somebody help me please

Discussion in 'Anything Airgun Related' started by Welshdean, Jan 24, 2014.

  1. Welshdean

    Welshdean Well-Known Member

    Messages:
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    Location:
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    I've recently bought a bsa lightning xl.
    had problems with it cocking and it was one of the trigger springs that was too weak. So we stretched it a bit and now it cocks ok.
    but it's only firing at 7.9 lbs, I've changed the barrel seal but haven't had a chance to put it on a chrono again since . If the power has not gone up, what else can be done to increase it please
     
  2. timmytree

    timmytree Pro Poster

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    Location:
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    If it's only doing 7.9 I would say it's badly in need of a piston seal, new spring and a service. Stretching springs isn't a good idea, far better to get new ones from a good supplier. Try Chambers airgun spares.
     
  3. tommy gun

    tommy gun Posting Addict

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    Location:
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    you still on with it could of had it done and back by now. before you try and put a new piston seal in [ hard to get maxi rail off] try the spring standard are 260 mil long.
     
  4. Welshdean

    Welshdean Well-Known Member

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    I took it to somebody off a Facebook group who lives not far from me. We were waiting on the generic sear spring to turn up. And the cocking problem seemed to be sear spring was not pushing the sear up as the spring wasn't strong enough, so we stretched the spring a little and it worked. But I'm only getting 7.9
     
  5. tommy gun

    tommy gun Posting Addict

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    Location:
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    i think it will be the spring
     
  6. Welshdean

    Welshdean Well-Known Member

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    Tommy gun, do you have Facebook as we could chat on there so I can describe the issue better
     
  7. tommy gun

    tommy gun Posting Addict

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    no sorry.i can't think it will be the piston seal i have had bsa supersports and lightnings for years and the piston seals never show much wear if it is cocking and firing and the power is down i would go for the spring.
     
    Last edited: Jan 24, 2014
  8. Welshdean

    Welshdean Well-Known Member

    Messages:
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    Location:
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    I don't want to spend any more money on this rifle really if I don't have to. I've already been robbed so far, how do I know if it's a spring problem
     
  9. tommy gun

    tommy gun Posting Addict

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    Location:
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    take the spring out the standard length spring is 260 mil long if its less than 240 its knackered offer still stands if you want me to have a look just cost you post
     
  10. bigbadbear

    bigbadbear Donator

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    Location:
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    7.9, deffo new spring required no doubt,
     
  11. tommy gun

    tommy gun Posting Addict

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    if its the original spring when you take it out it will probably be snapped a 1 ins from the end hence the low power.
     
  12. oliver13

    oliver13 Donator

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    Location:
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    While you've got the spring out, & bearing in mind the Maxigrip scope rail is such a pain to take off & replace, before you do that - try manually pushing the piston in while you hold your finger over the transfer port, assuming you can get it in there, do it a few times & see if you can get a sense of air leaking around the piston seal - it should be pretty airtight to completely airtight.
    If it does seem like air is getting past then a new piston seal is in order.
    It's not a sure thing, the seal needs to be pretty bad to show up like this, but it might help?
     
  13. Welshdean

    Welshdean Well-Known Member

    Messages:
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    Location:
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    Is it likely to show up as lower power if it's been taken out, checked, and put straight back in without cleaning. Because I've read that new rifles take a while to settle in, or would it not make any difference
     
  14. oliver13

    oliver13 Donator

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    At first they tend to be a bit erratic when they've been reassembled, it is difficult to avoid a little lube in front of the piston & it diesels a bit, then they tend to pick up as they bed in, maybe worth a ftlb, it's unlikely to make up for your 7.9ftlbs.
     
  15. tommy gun

    tommy gun Posting Addict

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    is there any washers in front of spring or in front of plastic tube in piston if not try putting 3 in see if power goes up
     

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