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Bsa Meteor Pre Load!!!!

Discussion in 'Technical' started by Halinfax, May 3, 2020.

  1. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Gentlemen.... please can anyone advise what the "normal preload" is for a Meteor Mk 5..

    On 1st re-assemble of the periodical rifle...there was quite a bit of preload.. so much so that the front cocking linkage broke when I got to about half way cocked...

    CAVEAT.... there was evidence of previous fracture so it was not just fresh....!!!!!

    Also... anyone have a spare front or complete cocking link for a Meteor Mk5 please???
     
  2. Meal Dot

    Meal Dot Posting Addict

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    Never measured it myself but all Meteors I have owned or worked on needed a compressor of some sort to get the guts in far enough to fit the cross-pin. Suspect your breakage was simply due to the pre-existing fracture. Sorry can't help more.
     
    Redcap 114 and Halinfax like this.
  3. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Heyup MD... I think your right mate... but as there is a "high compression piston" in there... I wondered about the pre load...

    Might have to take a coil or two off the spring and adjust it with power bands on the spring guide.

    That's once I get a new cocking link assembly...!!!
     
    Redcap 114 likes this.
  4. trebike0

    trebike0 Busy Member

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    Both of mine have a fair bit of preload ,but haven’t ever measured to be honest ,They take more effort than other springers I’ve tinkered with.
     
  5. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Thought I would show you the high compression piston....!!!!

    As opposed to the original (the rust one...) the one I made a LONG time ago... and the brass piston ...

    I think I may still have to remove at LEAST 1 full coil....

    20200503_141000.jpg 20200503_141037.jpg 20200503_160845.jpg
     
    Gat Man likes this.
  6. Meteor62

    Meteor62 Major Poster

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    They all have plenty of preload but I can usually manage to get it put together on my own using a screwdriver down the spring guide and pressing my body weight down manage to get the retaining pin in. Another person helping makes life easier though.
     
    Halinfax likes this.
  7. 1260engineer

    1260engineer Precision matters

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    3.000 600 tons thats cubic by the way :thumb:....:facepalm:

    normally you can just get the parts to meet then stick a pozi through :thumb:
     
    Halinfax likes this.
  8. 1260engineer

    1260engineer Precision matters

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    or get the misses to do it .. it will keep her entertained for hours while you bug out to the shed :thumb:
     
    Halinfax likes this.
  9. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Heyup Meteor.. that's about the same load of pre-tension I have on mine too....

    Was just wondering IF there were "summat a bit more scientific"...:thumb::thumb::thumb::thumb::thumb:
     
  10. Meteor62

    Meteor62 Major Poster

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    I have a tool that I eventually made up for taking the preload on a meteor with a cut out to accommodate the retaining pin which assists greatly. Hope this explains itself.
    [​IMG]
     
    john79 and zippy1 like this.
  11. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Yes mate.. mine is exactly the same .. made out of a bit of broom handle and a radius on the end... "so it sits snugly in your palm"...

    The brute force to push it down...... I have always had that.....:finger::finger::finger:
     
  12. wezil

    wezil Posting Addict

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    Hi, the H/C one looks like a TR Robb piston got one in my scorpion pistol, it's adjustable with different buffer washers to vary the power. Just as a matter of interest Meteors used to be "allowed out of the factory provided they reached a minimum velocity 512fps in .22 and stayed legal". Doesn't state about .177 courtesy of The Airgun Book by John Walter.
     
    Halinfax likes this.
  13. trebike0

    trebike0 Busy Member

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    35mm preload on mine , had it apart this morning .
     
    Halinfax likes this.
  14. zippy1

    zippy1 Donator

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    I ended up making a rack, based on a thick base board with a car Jack on a fixed block at one end and a lockable bolt on block at the other. I was made to take weird adapters like yours for specific rifles. the oddest being the Mercury/airsporter one. ( a tube with a short slot and a hardwood bent wedge affair, to follow the contour of the trigger block)
     
  15. wezil

    wezil Posting Addict

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    I repurposed my wood lathe to do the same job
     
    zippy1 likes this.
  16. Meteor62

    Meteor62 Major Poster

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    Come to think of it I think a kind forum member sent me this foc.
     
  17. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Heyup Trebike.. was that from the end of the spring to the end of the cylinder body or to the centreline of the locking pin???
     
  18. zippy1

    zippy1 Donator

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    It never entered my head to try that - Ingenious! :thumb:
     
  19. wezil

    wezil Posting Addict

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    Im suprised it entered mine as well, only paid £40 for it s/h no bit of wood is safe now!
     
    zippy1 and Halinfax like this.
  20. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Haha Wezil... whittlers of the world unite......:whoo::whoo:
     
    wezil likes this.

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