Question on a possible U1 service
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Thread: Question on a possible U1 service

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  1. #1
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    Question on a possible U1 service

    I have a U1, eta version that although keeps great time, may need a service for the crown/thread. Sometimes when unscrewing the crown, it doesn’t “ pop” into position 1, I have to just lightly pull and it will go in. Also when going to screw it back down, I sometimes have to “ search” for that pushed in pin feeling that you feel before screwing the crown back down. Is this something normal with these models? Does it need a service ASAP? Thanks

  2. #2
    Member MONVMENTVM's Avatar
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    Re: Question on a possible U1 service

    Quote Originally Posted by Blkmax32 View Post
    I have a U1, eta version that although keeps great time, may need a service for the crown/thread. Sometimes when unscrewing the crown, it doesn’t “ pop” into position 1, I have to just lightly pull and it will go in. Also when going to screw it back down, I sometimes have to “ search” for that pushed in pin feeling that you feel before screwing the crown back down. Is this something normal with these models? Does it need a service ASAP? Thanks
    Sounds fairly normal with most automatics tbh. Most of the time the crown pops into position 1 only when after unscrewing you either rotate in the other direction (so basically by winding it) or pull on it slightly.

    The other thing is actually always recommended to do to avoid cross threading. Push on the crown slightly to overcome the force of the spring and at the same time "unscrew" it until you can feel that it suddenly "falls" into the thread. This is when the threads are correctly aligned and you can start screwing it down without running the risk of cross threading.
    nodnar, gaopa, Geof3 and 1 others like this.

  3. #3
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    Re: Question on a possible U1 service

    ^^^ this.

    Even my UX is like this.
    And I always do the backwards bit when screwing down.


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    Geof3 likes this.

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  5. #4
    Member Geof3's Avatar
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    Re: Question on a possible U1 service

    Yep, the threads are tiny. Very easy to cross thread. I sure the above method as well.
    Too many flipped...

  6. #5
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    Re: Question on a possible U1 service

    I unscrew my U1, and generally have to wind half a turn before I feel the pop.
    Then a backwards turn before screwing it back in with constant pressure.
    Got smoother over the years, and now nearly as fluid as the Rolex.

  7. #6
    Member JacobC's Avatar
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    Re: Question on a possible U1 service

    I have an Oris that won't pop out when fully unwound also, you have to turn it a little bit to get it fully unseated. I suspect these things are actually by design but I'm unsure.


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