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  1. #1
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    Default need advice- detached rotor

    hi! I received a Hublot King Power from a TD. WH=hen i took it out of the packaging the rotor was just rattling around in the case, not detached. I am trying to save the watch a trip back to China for what is prob a minor thing.

    I removed the case back and the only loose parts were the rotor and a little shiny ring. (see pic)'

    rotor.jpg

    My goal is to re-attach the rotor but I am not clear on how it attaches. It doesnt appear to screw to anything. I tried applying a little gentle pressure to see if it "snaps" in place, but it doesnt appear to.. (or maybe I didnt apply enough pressure but I didnt want to break anything). I dont have much experience opening up watches so this is new territory for me. Appreciate any advice on how to proceed.

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    Default

    Hi Howard

    Your rotor has detached from the rotor bearing. Your bearing is the round part with the little balls in it, still connected to the watch with the blue rotor screw. The silver lock washer is what keeps those parts together. Some rotors are pressure fit to the bearing, others like yours use the lock washer arrangement. It's a simple fix, but best done with the proper tool.

    See this video

    How to replace rotor bearing on an automatic watch. Valjoux 7750 + 2892-A2. Watch repair tutorials. - clipzui.com
    We are all related in time since time is relative to us all.

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    Default

    looks like you are missing a washer/ring? The one with th cut outs goes under this one. see arrow in pic...or the washer was glued on the gear with the rotor but i don't think so.
    dlt5ae.jpg
    Attached Images Attached Images

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    Default

    Quote Originally Posted by capice View Post
    looks like you are missing a washer/ring? The one with th cut outs goes under this one. see arrow in pic...or the washer was glued on the gear with the rotor but i don't think so.
    dlt5ae.jpg
    It looks to me like the washer is part of the bearing, and is still attached to his bearing. Pic is from the linked video.

    How to replace rotor bearing on an automatic watch. Valjoux 7750 + 2892-A2. Watch repair tutorials. - clipzui.com

    We are all related in time since time is relative to us all.

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    Default

    So do you think Im missing something/something's broken? Or i just need to place the rotor back in and then the lock nut and use one of those tools to rotate it into place?

    Quote Originally Posted by KJ2020 View Post
    It looks to me like the washer is part of the bearing, and is still attached to his bearing. Pic is from the linked video.

    How to replace rotor bearing on an automatic watch. Valjoux 7750 + 2892-A2. Watch repair tutorials. - clipzui.com


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    Quote Originally Posted by howardnyc View Post
    So do you think Im missing something/something's broken? Or i just need to place the rotor back in and then the lock nut and use one of those tools to rotate it into place?
    I think you just need to reattach the rotor to the bearing. Take the bearing out of the watch and test fit the lock washer (Mark Lovick calls it a bolt in the video, he's probably right although it looks more like a washer than a bolt to me). If the lock washer lines up well and looks like it will catch properly under the flanges on the bearing, there's your answer. If something were broken off it should have spilled out or still be rattling around in your case.
    We are all related in time since time is relative to us all.

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    Default

    Quote Originally Posted by KJ2020 View Post
    It looks to me like the washer is part of the bearing, and is still attached to his bearing. Pic is from the linked video.

    How to replace rotor bearing on an automatic watch. Valjoux 7750 + 2892-A2. Watch repair tutorials. - clipzui.com

    I am sure you are right but how does this keep the cut out washer in place as it looks like a gear on the outside so it should be under the cut out washer instead of above it? Or am i wrong about the position?

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    Quote Originally Posted by capice View Post
    I am sure you are right but how does this keep the cut out washer in place as it looks like a gear on the outside so it should be under the cut out washer instead of above it? Or am i wrong about the position?
    The retaining washer permanently attached to the bearing has 4 flat sides and 4 round sides. The locking washer inner perimeter is the same configuration. When you twist the locking washer with the tool, you are positioning its flat inner sides under the round sides of the bearing retaining washer. This provides 4 sides of tight contact keeping the bearing attached to the rotor. The notches in the locking washer are just for tool access.


    We are all related in time since time is relative to us all.

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    Quote Originally Posted by KJ2020 View Post
    The retaining washer permanently attached to the bearing has 4 flat sides and 4 round sides. The locking washer inner perimeter is the same configuration. When you twist the locking washer with the tool, you are positioning its flat inner sides under the round sides of the bearing retaining washer. This provides 4 sides of tight contact keeping the bearing attached to the rotor. The notches in the locking washer are just for tool access.


    here you go, thanks for explaining, i pulled out some hairs trying to figure out how it was seated....

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  14. #10
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    Quote Originally Posted by capice View Post
    here you go, thanks for explaining, i pulled out some hairs trying to figure out how it was seated....
    If it were mine, I'd be tempted to try to lock that washer down with a makeshift tool but then again I've taken that approach too far before...

    Hehe

    Horotec Oscillating Weight Bolt Tool for Eta 2892/7750

    Yikes!
    We are all related in time since time is relative to us all.

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