Steyr Lg110 Hammer

Discussion in 'Steyr' started by hmangphilly, Mar 6, 2019.

  1. hmangphilly

    hmangphilly Can't Re Member

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    Or ...........

    If I had a hammer ..............tra la .............

    Ok .
    We had a poke and prod at my lovely new mate's gun the other week .
    It was shooting with some puzzling inconsistency

    On first inspection , Nothing too much to see inside .
    I forget the sequence of events or exact details but suffice to say , closer inspection revealed the hammer was bent and marked at the end . The sear also had some marking where it had contacted the hammer .

    Rifle worked through , marked parts polished out , reg tested everything tickedy boo and rebuilt .
    Seemed to shoot ok for a while then gradually gone off again .

    My lovely mate popped it apart and sent me this Hmmm....

    IMG_1336.jpeg

    so something's going on between the hammer and sear.
    Better have a look at the sear especially as we cleaned it up on the first build .....gotta be that .....surely a burr or bad finish .

    View attachment 40479 IMG_3981.JPG IMG_3982.JPG

    In the first sear pic there's a witness mark of where the face of the hammer has slid past the face on the sear .
    These are both hard sufaces
    We are not too worried about that unless it causes a burr or transfer of material to the side of the hammer or upper surface of the sear , which looks untouched .

    I have previously 'tested a hammer for 'hardness' by the scientific method of skidding a file across the surface .

    If the file cuts metal , it's not so hard ;
    If it skids off ,it's harder than 'not so hard '.

    I've only ever been interested in the very end face that strikes the valve , to see if the hammer would long term become indented by the valve stem .

    and

    yep they are hard

    IMG_3985.JPG

    So
    Of course the sides are hard too ........right ?
    Well.....

    IMG_3983.JPG IMG_3984.JPG
     

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    Last edited: Mar 6, 2019
    cloverleaf likes this.
  2. nemesis

    nemesis 55yrd standing expert, or was it 8 or 9?

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    Take the return spring out Phil and run it for a while without it in. Since doing mine I've never had to strip it again or had a false triggering.
    If it fails to cock remove a few mill off the plastic end stop.
     
  3. hmangphilly

    hmangphilly Can't Re Member

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    Cheers Neil

    keep watching .................
     
  4. hmangphilly

    hmangphilly Can't Re Member

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    So
    an ordinary file made these marks .
    I got a bit enthusiastic on that deep one at the front .

    If any ones thinking of testing this , do it on the relieved area here .......hindsight and all that ........

    Aaaargh . Bloody Hague's interupted me flow .........
    gotta re load me pics ......hang on ......
    IMG_3992.JPG

    Strange innit ?

    Next question , how do they manage to harden the end tip but not the sides ?
    More importantly , Can I harden the sides ?

    Luckily ? (since thoughtlessly filing quite a deep gouge in the front of the original hammer ) We now have a guinea pig .

    It's all part of the service you know ......

    Muwahahaha............Have it .........

    IMG_3988.JPG
    Nah hotter


    IMG_3989.JPG
    Trust oil bucket

    IMG_3990.JPG

    file just skids off now , those marks are just in the blackening

    IMG_3991.JPG

    Next bit repeat the process on the other hammer , Check it for straight .

    Rob , can you put that vid in here ...of the clocking of the hammer .... Ta .


    In a previous thread , we discussed the hardness and dressing of the sear .

    All the sears we've seen so far appear to be through hardened .

    As a belt and braces , I've polished this sear on a mop. It has rounded the edges off quite a bit , it's working well so far , but I'll save putting up any details till I'm sure it'll be trouble free .
     
    Last edited: Mar 6, 2019
    cloverleaf likes this.
  5. SteveC200

    SteveC200 Well-Known Member

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    Is your new BFF Mr Lloyd by any chance and my ex WTF head scratcher LG?
     
  6. hmangphilly

    hmangphilly Can't Re Member

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    Might be Steve .

    Think we're on the right track

    Good job on that reg by the way .
     
  7. SteveC200

    SteveC200 Well-Known Member

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    Thanks. :) Hope you get it sorted. Johns shooting has been on the up since he got it, it'd be a shame to see him have to go back to his filthy FTP.
     
  8. hmangphilly

    hmangphilly Can't Re Member

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    Won't rest till it's fixed Mate

    it's close.
     
    Tarzan and SteveC200 like this.
  9. hmangphilly

    hmangphilly Can't Re Member

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    Not bad . aah not the best pic really ........

    25B9A9A0-FF6E-4B7A-8A6E-E5547212C40A.jpg
     
    Last edited: Mar 7, 2019
  10. Johnl

    Johnl New Member

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    Looks like the hardening has done the trick.
     
  11. hmangphilly

    hmangphilly Can't Re Member

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    so far so good
     

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