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Guidance on How To Remove Crown Stem Assembly from 1940 30T2

  1. bubu16

    bubu16 May 17, 2020

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    Morning Community:
    I found a shop that can repair the case back of my watch but I need to send the entire case as well. Can't figure out how to take out the crown stem to take out the movement. I don't see any holes/pins like some watches where you need to do is push while pulling out the crown. Guidance please? Thanks.

    IMG_5011.JPG IMG_5015.JPG IMG_5016.JPG
     
  2. STANDY

    STANDY schizophrenic pizza orderer and watch collector May 17, 2020

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    You can’t send the whole watch ?
     
  3. bubu16

    bubu16 May 17, 2020

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    The shop is in Asia and to be on safe side the guy just want the case/case back. Thanks
     
  4. bubu16

    bubu16 May 17, 2020

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    Messed up Case Back.
    IMG_5015.JPG
     
  5. Dan S

    Dan S May 17, 2020

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    You need to loosen the stem release screw, but just enough to remove the stem. Not too much. If you mess it up, you're going to be unhappy.

    My feeling is that if you don't have experience with this, you'd be better off letting the shop do it. What's the big risk in shipping the whole watch? If the case and case-back are lost in the mail, you're pretty much out of luck anyway.
     
  6. bubu16

    bubu16 May 17, 2020

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    That is so true. Didn't think of that that way. The shop(Asia) uses a courier here in Oregon (don't ask me why) then from Oregon to him. Maybe he doesn't trust this courier with a complete watch(lol)? Which one is the stem screw? I can do it. It is just that I am so used with Seiko. Thanks Dan
     
  7. Maskelyne

    Maskelyne May 17, 2020

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    Use the proper tool end be gentle.

    Omega.jpg
     
  8. STANDY

    STANDY schizophrenic pizza orderer and watch collector May 17, 2020

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    ::popcorn::
     
    watchyouwant likes this.
  9. bubu16

    bubu16 May 17, 2020

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    Als 27 likes this.
  10. Dan S

    Dan S May 17, 2020

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    It's important that you only unscrew it enough to remove the stem. Don't go crazy unscrewing it multiple turns. Be gentle and slow.
     
    Als 27 likes this.
  11. bubu16

    bubu16 May 17, 2020

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    I have done this on a Seiko 6139-yeap a chrono-yeaaaaaasr ago!!!!(lol)
     
    STANDY likes this.
  12. bubu16

    bubu16 May 17, 2020

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    Try to pull the crown out every screw turn?
     
  13. Dan S

    Dan S May 17, 2020

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    Less than one turn. You might start with one turn, or one and a half. But if that doesn't release it, I would go half a turn from there.
     
    Als 27 likes this.
  14. bubu16

    bubu16 May 17, 2020

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    ;-) So much.
     
    Als 27 likes this.
  15. bubu16

    bubu16 May 17, 2020

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    Als 27 likes this.
  16. Dan S

    Dan S May 17, 2020

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  17. STANDY

    STANDY schizophrenic pizza orderer and watch collector May 17, 2020

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    You made me laugh when you asked where the crown screw was. :D
     
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  18. Dan S

    Dan S May 17, 2020

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    I know. I wasn't going to be the one to take responsibility for giving that answer. But once he seemed determined to try it, I thought I'd try to help. That thread I posted has advice from watchmakers.
     
    BatDad likes this.
  19. bubu16

    bubu16 May 17, 2020

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  20. bubu16

    bubu16 May 17, 2020

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    Wanted to be sure (or did I say it wrong-should be "stem"-lol). I have messed up so much quartz and mechanical trying DIY..
     
    Als 27 likes this.