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Old 29 September 2017, 10:13 PM   #1
Gigaton Punch
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Possible crown/gear issue? Moving second hand while changing time

Hi All,

Originally posted in general, but I guess it makes more sense here. I have a GMT Master II(c). When I pull out the triple lock crown to change the time (in the outer most position), sometimes the second hand keeps moving while I change the time. If I continue to move the minute hand, the second hand eventually stops (seems to be a gear thing). Happens about 1/3 of the time. Is this normal or a problem?
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Old 30 September 2017, 02:15 AM   #2
NKflyer
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It's not normal. I am not a watchmaker by any means, but I did have a similar problem with a Submariner and my local watchmaker replaced the hack "finger", I think also referred to as hacking lever, which was bent or broken if memory serves. Was a very quick and cheap repair, done while i waited.
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Old 30 September 2017, 04:02 AM   #3
tamiya
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Quote:
Originally Posted by Gigaton Punch View Post
I have a GMT Master II(c). When I pull out the triple lock crown to change the time (in the outer most position), sometimes the second hand keeps moving while I change the time. If I continue to move the minute hand, the second hand eventually stops (seems to be a gear thing). Happens about 1/3 of the time. Is this normal or a problem?
"Keeps moving" as in it doesn't hack = keeps ticking?

Or does the seconds hand stop ticking and freewheels along with the minute hand as you're adjusting it.
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Old 30 September 2017, 05:09 AM   #4
Gigaton Punch
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Quote:
Originally Posted by tamiya View Post
"Keeps moving" as in it doesn't hack = keeps ticking?

Or does the seconds hand stop ticking and freewheels along with the minute hand as you're adjusting it.
Yes, the second hand "keeps moving" as in it "keeps ticking."
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Old 30 September 2017, 05:20 AM   #5
tamiya
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Quote:
Originally Posted by Gigaton Punch View Post
Yes, the second hand "keeps moving" as in it "keeps ticking."
Go with what NKflyer said then

I witnessed the 2nd scenario recently, quite intriguing. It was on a Quartz Swatch with no battery, haven't gotten around to working out why.
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Old 17 October 2017, 12:16 AM   #6
Gigaton Punch
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Quote:
Originally Posted by NKflyer View Post
It's not normal. I am not a watchmaker by any means, but I did have a similar problem with a Submariner and my local watchmaker replaced the hack "finger", I think also referred to as hacking lever, which was bent or broken if memory serves. Was a very quick and cheap repair, done while i waited.
I was actually going to service the watch next April (5th year). Should I go ahead and service 6 months early, or is it OK to wait? My concern with the latter route is that it may damage something else if I wait too long.

Also, found some old threads discussing the same issue. Some posters said it was due to low oil, while others say it's normal. Interesting.

https://www.rolexforums.com/showthread.php?t=390251
https://www.rolexforums.com/showthread.php?t=120948
https://www.rolexforums.com/showthread.php?t=110695
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Old 17 October 2017, 05:21 AM   #7
gmooreil
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Thats not supposed to happen at all. You need to have someone look into that.
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