scotthammond Posted May 18, 2007 Report Share Posted May 18, 2007 I have an Omega SMP GMT with the modified 2836 movement, purchased from another member. The red GMT hand periodically stops tracking properly throughout a 24 hour cycle. I can set the GMT hand properly with the crown, with no sense that the gears are not engaged properly. When I move the hour and minute hands with the crown the GMT hand tracks properly. The hand will track normally for an hour (or three or six - it varies), then stop moving. I will then start back up again on its own later in the day. It stops at different points on the dial, so it doesn't appear it is catching on a high spot on the dial or anything like that. Any thoughts as to why this is happening and what would need to be done to fix it? I am comfortable with the thought of pulling the movement and the hands (just ordered the right tool for the job ) so I am willing to take a crack at fixing this myself. Or is this too risky and I should just send it out to The Zigmeister? Thanks for any advice! "Scotty" (no Trekkers, not that one...) Link to comment Share on other sites More sharing options...
RWG Technical Posted May 18, 2007 Report Share Posted May 18, 2007 There could be a number of reasons why it's stopping, most likely the problem is the attachment and engagement of the GMT gear to the rest of the gears. It could be as simple as installing a dial washer over the gear stack to make sure the gears stay engaged. One simple test it this, lie on the bed with the watch upside down over your head (ie dial facing you), pull the crown to the time setting position, and turn the time, watch the GMT hand, and see what it does, if it skips a beat, the gears are becoming unmeshed and that is your problem. RG Link to comment Share on other sites More sharing options...
scotthammond Posted May 18, 2007 Author Report Share Posted May 18, 2007 There could be a number of reasons why it's stopping, most likely the problem is the attachment and engagement of the GMT gear to the rest of the gears. It could be as simple as installing a dial washer over the gear stack to make sure the gears stay engaged. One simple test it this, lie on the bed with the watch upside down over your head (ie dial facing you), pull the crown to the time setting position, and turn the time, watch the GMT hand, and see what it does, if it skips a beat, the gears are becoming unmeshed and that is your problem. RG Thanks The Zigmeister - I'll try that tonight. If that is the problem, is a dial washer something I can get from a local watch guy or something special I need to order specific to the movement? Link to comment Share on other sites More sharing options...
RWG Technical Posted May 18, 2007 Report Share Posted May 18, 2007 Dial washers are common, you just need to size it to fit over the gear. RG Link to comment Share on other sites More sharing options...
olivia Posted May 18, 2007 Report Share Posted May 18, 2007 " lie on the bed with the watch upside down over your head " And will work even if you are not in bed ...just get the watch upside down over your head> Link to comment Share on other sites More sharing options...
RWG Technical Posted May 19, 2007 Report Share Posted May 19, 2007 " lie on the bed with the watch upside down over your head " And will work even if you are not in bed ...just get the watch upside down over your head> No, no, no, you have to be in BED for it to work... RG Link to comment Share on other sites More sharing options...
scotthammond Posted May 19, 2007 Author Report Share Posted May 19, 2007 No, no, no, you have to be in BED for it to work... RG In bed, out of bed, didn't really matter. Having the watch upside down I tried as The Zigmeister suggested to see if the gear was indeed disengaging. It didn't. I even tapped it a bit to see if that had any effect. The GMT hand followed perfectly. Any other thoughts? Link to comment Share on other sites More sharing options...
RWG Technical Posted May 19, 2007 Report Share Posted May 19, 2007 Well then I think your going to have to remove the dial and see what is going on with the gears and their attachment. The GMT gear is driven by a small transfer gear that also drives the calendar change gear, it's probably slipping out of engagement now and then... RG Link to comment Share on other sites More sharing options...
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