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  1. #31
    Forums Administrator harold bain's Avatar
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    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: sandcastcb750)

    I repaired one recently where the pinion on the second wheel had worn enough that it allowed the spring wheel to escape, a bit at a time. I noticed the problem before it became a UFO. Replaced both wheels.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  2. #32
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    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: sandcastcb750)

    Quote Originally Posted by sandcastcb750 View Post
    Harold, you are correct about that winding those Liberty clocks. It has a real funky uneven feeling about it when winding. Maybe someday the key will become a spinning helicopter in the air.
    this one did
    Attached Thumbnails Attached Thumbnails 20120830_114511.jpg  

  3. #33
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    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: dAz57)

    It is pictures like this that tell me to let down
    slowly on the keys. Every time one hammers them
    by dropping the key, on the click, is one time it is closer to fail
    and a black thumb.
    Tinker Dwight

  4. #34

    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: Tinker Dwight)

    Wow. I've never see a click break like that!

  5. #35
    Forums Administrator harold bain's Avatar
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    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: shutterbug)

    I've seen a few broken like that on Asian movements. Never had one break while I was winding one though.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  6. #36

    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: harold bain)

    Judging from the condition of the teeth, I wonder if it blew by a few teeth and anchored itself solidly into a 'good' one after it picked up considerable speed?

  7. #37
    Forums Administrator harold bain's Avatar
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    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: shutterbug)

    I suppose it could have been caused by having the key slip while winding, allowing a quick release of teeth, then have the click catch one, fracturing the click with the force of the runaway click wheel.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  8. #38

    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: lirenrui)

    A friend of mine spent a year in Korea while stationed there in the Army. He came back with the saying "almost good".

    That click could have been bad metallurgy and was destined to fail.

  9. #39
    Registered user. Kevin W.'s Avatar
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    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: sandcastcb750)

    Just glad my thumb and fingers was not on the key when that happened, it hurts just thinking about it.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  10. #40
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    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: harold bain)

    Quote Originally Posted by harold bain View Post
    I suppose it could have been caused by having the key slip while winding, allowing a quick release of teeth, then have the click catch one, fracturing the click with the force of the runaway click wheel.
    don't know, the ratchet teeth were pretty good, the click was thin, only half the thickness of the ratchet wheel teeth, I replaced it with a click twice as thick.

    here is another shot of the click off the wheel, it looks it was torn, it is still hanging together by a thread
    Attached Thumbnails Attached Thumbnails 20120830_121158.jpg  

  11. #41

    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: dAz57)

    They don't just break. It's usually a mishap as mentioned by Bugs and Harold. Or, just bad winding habits.

    When a ratchet hangs, tip to tip, there are at least 5 things that can happen. The click can snap directly into the present gullet of the click wheel, the click can snap out of the wheel and into the next gullet, or the click can snap out for a short length of time and catch soundly two or three gullets down, it can snap out for a longer length of time and skate over several click wheel teeth before landing solidly somewhere, or the outward snap can bend or break the click spring and allow a full let down.

    Each of these 5 steps spells the dissipation of more and more energy. The first one would probably go unnoticed. The second probably would not do much damage. Three and four will cause damage but the damage might be overlooked until further damage is caused by continued use. The fifth one can wreck your clock movement and your poor fingers.

    My 2, Willie X

  12. #42

    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: harold bain)

    does anyone have a internal type picture of above clock--found extra piece on bottom?? Do not know if it is a replaced item or goes somewhere else. looks like possible flat spring

  13. #43
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    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: capone47)

    I think it would be most helpful if you can post a picture of what you found, then we could be more helpful.

    David
    David S

  14. #44
    Forums Administrator harold bain's Avatar
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    Default Re: Changing Sehwa (Korean) 31 Day Mainsprings (By: capone47)

    If you show us a picture of what you have, good chance we can tell you if it could be from your clock movement.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

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