Seiko service repair

[Colditz]

Hi

can anyone confirm that the Seiko 7S26C movement is wound only by the automatic work and not able to be wound manually?

Thanks

[Jon]

That's right... They're not hand windable

[JohnD]

Easily fixed by swapping out the movement with an NH36 one and you get the added bonus of hacking as well....(as I did with my SNX007)...

[jdrichard]

Easily fixed by swapping out the movement with an NH36 one and you get the added bonus of hacking as well....(as I did with my SNX007)...

So the swap out fits perfectly?


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[JohnD]

2 hours ago, jdrichard said:

So the swap out fits perfectly?


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Yes, The NH36 is really just a 7s26 with the extra complications added, the hands and dial fit the new movement , only thing that would have to be 'fettled' is fitting the existing crown to the new stem as the 7s26 stem doesn't support the hand winding complication. Straightforward on a 3 o'clock dress watch, a bit more complicated on the SKX as the screw down crown can't be removed from the original stem, I fitted a 'Dragon Shrouds' Jumbo crown to mine to get round that...

If you wanted to keep the white on black day and day wheels they can be swapped over to the new movement to replace black on white ones that it comes with..

Edited May 25, 2020 by JohnD

[jdm]

6 hours ago, jdrichard said:

So the swap out fits perfectly?

The answer "yes" given above is substantially correct but incomplete and hurried. 

For example, on the very popular swapping to a SKX 200m divers, one cannot reuse the original stem/crown combo, so a new one must be bought.

Then, one must reuse the original movement ring, as well the day disc.

But you cannot count on carrying over the date wheel, because that changes across versions. 

I wrote about that many times here and on WUS, it should be easy to locate my postings for those that desire to gain full understanding and do a perfect job. 

Edited May 25, 2020 by jdm

[Colditz]

Many thanks guys. I needed the reassurance I had not screwed up. The watch has been completely repaired and serviced. The pallet stones had come adrift and using Mark L's repair of his brother inlaw's Seiko and a different video Mark posted on setting the pallet stones with shellac the watch is now showing good readings on the timegrapher.

The watch is a friends so will not be swapping out the movement but thanks for the heads up on that.

I'll post pics of the timegrapher readings tonight.

 

[Colditz]

What through me out was in Marks first video of Seiko 7226C watch service at 4:20 to 4:30 (10 seconds of play time), Mark states he wound the movement manually. I now realise he must have used a screw-driver in the ratchet wheel retaining screw.

Once again thanks to all at WRT.