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Help with 7S26 diagnoses

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Hi all, i have no experience repairing watches but I am a pretty hands on and mechanical guy. I am looking for some advice for my Seiko SNZG15, 7s26 movement. It's a pretty cheap watch so I have a feeling it might not be worth taking to a professional to repair. I will explain what happened and I hope that someone here can offer some advice.

I have worn the watch for three years straight. I was taking it off the other night and it slipped out of my hand and hit the floor face down. The Seiko emblem bent out from the face with the S still flush on the face and the o sticking out a bit, just enough to interfere with at least the hour hand. It's still ticking fine, but in my foolish curiosity I attempted to adjust the time. I don't remember which hand, but one of them came into contact with the emblem and got hung up. I was able to free it, but damage had already been done. Now I can't really adjust the time and the hour and minute hands are out of sink. When I turn the crown the hands don't move hardly at all, if any.  I'm thinking that since it is still ticking and keeping time that the actual movement is okay, but maybe some gears related to adjusting the time are damaged. Any thoughts? Can you even get replacement parts for this movement? I have watched some of the videos on this movement and I think that if it were the gears under the calendar and date wheels I might be able to replace them and just remove the emblem.

Thanks,

Eric

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6 answers to this question

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This is a simple movement to work on and while spares are available it may be easier to buy a used movement. The problems with the hands not moving could just be they need to be re-seated.

Check out Mark's video..most of the information you will require is here. Check back here if there's anything you need clarification on.

For the Seiko badge, if it is bent you will need to remove the badge, straighten it then re-install. The badge has two feet visible from the back of the dial.. you can poke it with a needle and the badge will come off.  You can't really bend it back while its still on the dial because it will spring back up. Once its flat, put it back in place and seal the pins in with some super glue. Let it dry overnight as the glue will give off gasses which will cloud the crystal.

Good luck

Anilv

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Further to the above, bond the pins with tiny spots of glue applied with the end of a needle, to the ends of the logo pins from the rear of the dial. Do not bond it directly to the front, as the glue will show and ruin the dial. Use just enough glue to make a solid bond, but remember, you may need to remove it again if things are not perfect. Acetone will remove superglue, but use with care, as it will also remove or damage many dial finishes.

The outgassing of superglue is a major issue when using it around anything transparent, near optical components and on some polished finishes.

I tend to use something a little slower curing if there is any risk of messing up glass or polished surfaces. Two part epoxy, and UHU, will also work, though they are more difficult to work with. They have the advantage/disadvantage (depending on the application) of much longer set up and cure times.

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Problem with two-part epoxy is that its quite thick, this may affect the operation of the day-wheel. Super glue will 'wick' into the joint. 

Anilv

 

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Thank you all for your input! It seems that the hands needed to be reseated as anilv suggested. I simply removed the badge for the time being and I'm not sure if I'll put it back on our not. It was a pretty stressful task having the watch taken apart even to the small extent that I did! The watch is now running really fast, gaining 5 minutes a day. Does it just need to be regulated? Or is that an indication that something else could be wrong?

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It is possible that the regulator was moved when the watch was dropped resulting in a change in the rate or even the beat. Another possibility is the hairspring has escaped from the regulator but this would usually result in a bigger variance.

Anyway, wear it for a while before you attempt to fix the rate.

Anilv

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