importr Posted April 12, 2010 Report Share Posted April 12, 2010 Hi guys/gals One of my a7750 chronos' hand keeps resetting to different postions. The hand is not loose (i checked and refitted it). For example, if its refitted to 60secs, on the first reset it goes to 3secs, the next reset it goes to 5secs and then the next reset it goes to 7secs etc. Is there a tutorial on how to fix this? Or is it a watchmaker service & repair only? Quote Link to comment Share on other sites More sharing options...
freddy333 Posted April 12, 2010 Report Share Posted April 12, 2010 Contrary to your finding, the most likely cause of this is a loose hand wand (the pivot between the wand & tube is loose), which leaves the hand in different locations on the dial each time you reset it. The fixes are to remove & tighten the pivot with a staking tool (I assume you do not have this), to cement the pivot joint with epoxy or whatever or replace the hand. (Original pic courtesy of Avitt) Quote Link to comment Share on other sites More sharing options...
arniezac Posted April 12, 2010 Report Share Posted April 12, 2010 I think that the second hand itself is moving on the tube (which mounts the hand to the movement), that is attatched to the back of it. There is a tutorial somewhere to fix this but I can't locate it. I think that if your comfortable de-casing a movement and removing hands then its most likely fixable by you. wrote this while freddy posted. Quote Link to comment Share on other sites More sharing options...
Mickey Padge Posted April 12, 2010 Report Share Posted April 12, 2010 I have a similar issue with one of my watches. Please, what is the best glue for the job? Quote Link to comment Share on other sites More sharing options...
Francisco Posted April 12, 2010 Report Share Posted April 12, 2010 I think that the second hand itself is moving on the tube (which mounts the hand to the movement), that is attatched to the back of it. There is a tutorial somewhere to fix this but I can't locate it. I think that if your comfortable de-casing a movement and removing hands then its most likely fixable by you. wrote this while freddy posted. the tuto is here: regards, Francisco Quote Link to comment Share on other sites More sharing options...
importr Posted April 12, 2010 Author Report Share Posted April 12, 2010 Thanks guys, but i initially thought it was exactly the problem you describe, but after refitting it twice, and trying to move the needle (it wouldn't move) ......i think it is something more serious. I hope i'm wrong! What i'll do tonight, is put a spare needle on, and see what happens. Thanks again Quote Link to comment Share on other sites More sharing options...
Francisco Posted April 12, 2010 Report Share Posted April 12, 2010 Thanks guys, but i initially thought it was exactly the problem you describe, but after refitting it twice, and trying to move the needle (it wouldn't move) ......i think it is something more serious. I hope i'm wrong! What i'll do tonight, is put a spare needle on, and see what happens. Thanks again wait a moment! One I had a similar problem. The hand tube was firmly attached to the output pin...however, the hand rotated freely. I found that the seconds gear was the problem. The pin was loose IN THE GEAR. regards, Francisco Quote Link to comment Share on other sites More sharing options...
importr Posted April 12, 2010 Author Report Share Posted April 12, 2010 I've just checked....and the chrono hand is firmly fixed, not loose on the tube or post. So maybe, Francisco , it is a similar problem to what you describe Quote Link to comment Share on other sites More sharing options...
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