28A
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Ruining original Seikos since 2015.
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Post by 28A on Oct 30, 2015 17:33:54 GMT -8
Hey guys quick question..
Have just got my parts diver assembled and while it's keeping great time, the seconds hand is very erratic. It's doing small jumps, then large jumps to compensate..
Is this just in need of a service or could it be something with the circuit or coil?
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28A
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Ruining original Seikos since 2015.
Posts: 1,030
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Post by 28A on Oct 30, 2015 17:36:16 GMT -8
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HiBeat
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SEIKO Iko Iko GDTRWS
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Post by HiBeat on Oct 30, 2015 18:48:25 GMT -8
Just so you know, & I hope it does not sound condescending, but many Seikos move 2 seconds at a time when the battery needs to be changed so you know before they go totally dead. Just when they get to the low level sometimes they only move in the 2 second interval intermittently.
Hopefully that's all you need !
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28A
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Ruining original Seikos since 2015.
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Post by 28A on Oct 30, 2015 18:59:47 GMT -8
Hi mate, no that could definitely be it but from memory the battery was a new one out of the packet. Perhaps it's an old battery though.
When my Seiko watchmaker first put it together the other night it ran quite slow, and then i readjusted the time later on and it's been keeping time ever since but occasionally has this erratic hand. Most of the way around the dial it'll do 1 second jumps but then sometimes it'll do a half, and then a one and a half to be back on track.
I might take it up to my other watchmaker on Monday and see what he thinks. From everything i've read these movements electronics wise.. either work, or they don't work. Anything relating to erratic hands seems to be that they need a service but then the Seiko watchmaker said there could be a number of things it might be and servicing it would be the best option.
I just wanted other opinions.. I may just fork out and have the movement serviced as he's offering to do it cheap anyway.
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Deleted
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Post by Deleted on Oct 30, 2015 19:29:20 GMT -8
Hi mate, no that could definitely be it but from memory the battery was a new one out of the packet. Perhaps it's an old battery though. When my Seiko watchmaker first put it together the other night it ran quite slow, and then i readjusted the time later on and it's been keeping time ever since but occasionally has this erratic hand. Most of the way around the dial it'll do 1 second jumps but then sometimes it'll do a half, and then a one and a half to be back on track. I might take it up to my other watchmaker on Monday and see what he thinks. From everything i've read these movements electronics wise.. either work, or they don't work. Anything relating to erratic hands seems to be that they need a service but then the Seiko watchmaker said there could be a number of things it might be and servicing it would be the best option. I just wanted other opinions.. I may just fork out and have the movement serviced as he's offering to do it cheap anyway. Since it runs and keeps time, I'm fairly confident it just needs a good cleaning and oiling. Apart from the stepper motor, most of the mechanism is the same as a mechanical watch and as such will require periodic servicing. Get it serviced and it will likely be good for another 20 years or more. |
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28A
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Ruining original Seikos since 2015.
Posts: 1,030
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Post by 28A on Oct 30, 2015 19:57:22 GMT -8
Alright, since i want to use this as a bit of a beater and eventually a TST as part of my regular rotation i'll get it serviced and hope for the best. I think the circuit and coil would be fine if it's working pretty good as is.
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Post by seikoholic on Oct 30, 2015 20:18:28 GMT -8
When 754x's need cleaning / servicing, they show it first in the sweep hand and/or the day/date change. But a fluttering or weird or inconsistent sweep hand means servicing.
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28A
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Ruining original Seikos since 2015.
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Post by 28A on Oct 30, 2015 21:06:23 GMT -8
I'm sure the movement worked fine before i pulled it apart but in saying that i've had it in and out of the case countless times so it's possibly got some crap in there somewhere. I guess a service should sort it out and any bad parts in the process but i would think it's just got some crap in it. The inconsistent seconds hand isn't doing it in a particular spot, completely random.. so a clean should fix it.
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Deleted
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Post by Deleted on Oct 30, 2015 21:13:59 GMT -8
I'm sure the movement worked fine before i pulled it apart but in saying that i've had it in and out of the case countless times so it's possibly got some crap in there somewhere. I guess a service should sort it out and any bad parts in the process but i would think it's just got some crap in it. The inconsistent seconds hand isn't doing it in a particular spot, completely random.. so a clean should fix it. One of the biggest mysteries is why 40 year old watches run fin until we mess with them. Just messing with them changes something that was not changed before. You may be right and it's just some small bit of ancient dust that has been dislodged by your ministrations. But that just points to the need for a full and complete service  |
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Adrian-VTA
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Adelaide, South Australia
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Post by Adrian-VTA on Oct 31, 2015 0:26:18 GMT -8
Gummy train or a hair/dust in the gears. Strip and rebuild. The module would be fine as it's supplying an impulse to the motor. Coil would be fine as it does move, but if you want to be sure, look up the spec and check the resistance.
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28A
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Ruining original Seikos since 2015.
Posts: 1,030
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Post by 28A on Oct 31, 2015 0:52:33 GMT -8
I know my desk is quite clean so i don't think it'd be something in there, every time i've pulled it out i've had it sit on a zip bag so not really much chance of dust or anything getting into it.. but i never did really test it when i got it because i pulled the battery to prevent leaking.. so it could have been gummy to begin with.
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cobrajet25
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Post by cobrajet25 on Oct 31, 2015 2:24:46 GMT -8
Definitely a mechanical problem if the skipping is intermittent.
I suspect it simply needs a service due to age, but a previous sloppy service (with too much oil) can cause similar problems with quartz watches.
Use too much oil and the step motor simply can't slog through it properly.
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28A
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Ruining original Seikos since 2015.
Posts: 1,030
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Post by 28A on Oct 31, 2015 2:40:24 GMT -8
Definitely a mechanical problem if the skipping is intermittent. I suspect it simply needs a service due to age, but a previous sloppy service (with too much oil) can cause similar problems with quartz watches. Use too much oil and the step motor simply can't slog through it properly. I didn't know that about using too much oil.. however i won't be the one servicing it (although i'd love to learn, i'm going to keep my eye out for another watch with this movement in so i can pull it apart and see if i can service it). I guess i just got lucky on the other watch i bought that had one of these in.. which ended up in my 6309-7040/7548 hybrid. That movement had a bit of battery leakage but no corrosion.. but service wise it seemed in good shape. Must be really just luck of the draw with the quartz movements. At least they ARE servicable though. |
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Adrian-VTA
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Adelaide, South Australia
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Post by Adrian-VTA on Oct 31, 2015 2:52:40 GMT -8
The old ones are anyway... Definitely a mechanical problem if the skipping is intermittent. I suspect it simply needs a service due to age, but a previous sloppy service (with too much oil) can cause similar problems with quartz watches. Use too much oil and the step motor simply can't slog through it properly. I didn't know that about using too much oil.. however i won't be the one servicing it (although i'd love to learn, i'm going to keep my eye out for another watch with this movement in so i can pull it apart and see if i can service it). I guess i just got lucky on the other watch i bought that had one of these in.. which ended up in my 6309-7040/7548 hybrid. That movement had a bit of battery leakage but no corrosion.. but service wise it seemed in good shape. Must be really just luck of the draw with the quartz movements. At least they ARE servicable though. |
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28A
WIS
Ruining original Seikos since 2015.
Posts: 1,030
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Post by 28A on Oct 31, 2015 4:06:19 GMT -8
Haha that's exactly what i was implying  |
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28A
WIS
Ruining original Seikos since 2015.
Posts: 1,030
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Post by 28A on Oct 31, 2015 18:37:20 GMT -8
Well just had a look at it this morning and the seconds hand is spending half it's way around the dial jumping backwards.. so it definitely needs a service.
I also noticed when i was screwing the crown back in prior to fitting the case back after taking the battery out.. the whole stem is spinning as the crown screws down. I gave my Seiko watchmaker a call and he said it's unusual but nothing that can't be fixed. He said he'll service it for $120 and jewel the mainplate as well so it should run a lot smoother. I asked about jewelling the bridge as it has 2 jewels and 2 bushes but he said they don't ever need doing. I dunno why they didn't bother using jewels on all four but anyway.. must of been cheaper i guess.
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