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hoipolloi
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Jerky hand on my 564.

Dear friends

  Yesterday, I received this hidden crown.

  and it had a jerky sweep second hand.,  ..I tried to ignore that but it was so enoying to me that I had to look around for a cure , I found "Jerky Second Sweeps on Constellation" written by Desmond but there is no help there.  Then I called my watchmaker 10,000 miles away and he told me what to do.

  And here's what I did.

        1_ I removed this screw            

            2. Then this screw. 

     3 - I lifted the whole thing up (rotor and rotor bridge) then put it aside.

            On  the other side of the unit, you can see the winding mechanism and  ring gears etc... I gave it some oil, of course.

     4. Looking at the center of the movement,  I saw a small friction spring pushing down on the sweep second pinion.

        My watchmaker told me because that spring is not pushing down hard enough, that makes the sweep second hand jerky (it's normal in used movement)

        5_ I loosened the screw that hold the spring but did not remove it, just loose enough to slide the spring aside only.

    Then I used a tweezer to push it down a bit then slide it back to it's position again.

      I tightened the screw then I checked the second hand and saw it moving nicely and no more jerky motion      (happy as a clam)

   Then I put that rotor and rotor bridge back into position, two screws went back to their holes, I turned them in a few turns, then I turned the rotor a few rounds in each direction, making sure the gear teeth engage into their position properly then I tightened the srew securely.

   After 20 minutes of working, I think I solved the problem and so happy. Still not sure how it's gonna be next week but I think I am ok for now.

   Cheers.

 Hoi.

  Warning : I am not showing anybody to do anything. Trying to do the same may cause bodily harm   or bring havoc to your movement. Your watchmaker is always the most reliable source of knowledge and service.

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