Seiko 7S26 Watch Service. Assembly Tutorial Part 1 Motion Works

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In this video I demonstrate how to assemble a Seiko 7S26 watch movement as part of my Seiko 7S26 watch service series. This movement is commonly found in the iconic Seiko SKX watches. I will take you through each part placement step by step and where to oil when necessary to do so as part of the watch service. This is part one which will cover the motion works side of the movement.
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Опубликовано:

9 сен 2024

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Комментарии : 88

@MyRetroWatches 5 лет назад

Have my videos have helped you? why not support the channel in some way You can make a one off/ monthy donation here in only one click: www.buymeacoffee.com/MyRetroWatches If you would like to purchase any tools & equipment then please see my Amazon affiliate & eBay (I do earn a small commission from any sales.) Thank you. Link: Link: myretrowatches.co.uk/tool-sale-links/ If you would like to buy any of my T-Shirts then please look here: teespring.com/stores/my-retro-watches

@levanthasis 2 месяца назад

- Incredibly talented. Hat off. -

@nunyabusiness9056 2 года назад

Brilliant video. Attemping my first assembly/dissassembly and then service soon. I cannot thank you enough for those closeups of the oiling.

@dodgydruid Год назад

All been going on here at Watson Towers lol Picked up a 1955 Roamer, serviced too and a Tissot Seastar 2030 quartz for a ridiculous cheap price but needs a stem and crystal, paid a tenner for the Roamer and its on a really unusual rally bracelet :) Spotted I hadn't given this vid a watch so going to sit back with my cup o' tea and enjoy :D

@adrianbirkett594 5 лет назад

Well done!, and no cursing or swearing!!!!. Good role model👍. Adrian🍀🍀

@MyRetroWatches 5 лет назад

Thanks Adrian. No swearing on this one . I save that for off camera😂

@andrewdeweerd461 4 года назад

Thanks! I took apart my Seiko divers watch when the second hand fell off. After pushing it back on, watch ceased running. Agh. I removed the movement and noted that the fingers on the escape wheel were not engaging the jewels on the pallet fork. I'm guessing (?) that I had put too much pressure on the cannon pinion when pushing the second hand on, which then flexed the bridge that captures the escapement pinion, and the escapement "escaped" its seating. So, I decided to disassemble the whole thing and clean. As usual, my exuberance in reducing a machine to its elements was directly followed by the discovery that the reverse operation was far more difficult. Your video made it easy though. I'm watching the balance wheel oscillating happily at this very moment. I've just ordered a timeographer and will get it beating properly before finishing the day/date assembly. You're a very good instructor with just the right touch of humor, self-deprecation, and demonstrable competence in the subject. Subscribed!!!

@MyRetroWatches 4 года назад

Hello Andrew. sorry for late reply to your comment. Firstly thank you for your kind words, I really appreciate comments like this as it motivates me to do these videos in the first place. really good news that you have your watch running again. Its a great feeling and one I am ever so slightly addicted to.

@olejohanpalsrud6896 5 лет назад

Great video, but I notised that you put the one wheel in the clutch the wrong way, the brass one. I've also done that a few times. Exept from that, great work.

@MyRetroWatches 5 лет назад

Ole Johan Pålsrud haha well spotted! Someone else also told me this so it’s rather embarrassing. In my defence I fitted that part by my naked eye....

@SriramVad 5 лет назад

I just bought an snxs77k ( the same movement. ) But it didn't work no matter how much I shook it ... So I gave it two firm whacks on the back and it started to work. But now it's running 16 mins fast everyday and I'm having to set the time daily. This video can definitely help me with that. Thank you so much.

@MyRetroWatches 5 лет назад

Hi, giving a watch a big whack is not recommended as you can do damage to the pivots and bend them. This is why the balance has shock protection. If it has stopped then its jammed up probably with old oil and needs cleaning / servicing. Now its running fast the chances are you have messed up the hairspring coils.

@SriramVad 5 лет назад

@@MyRetroWatches oh gee thanks. Yeah I guess that's what the problem is. I'll try doing something 😂. Or I'll just give it to service.

@gtcih 2 года назад

Hi Mike. Thank you very very much for your videos.

@GenWivern2 5 лет назад

Splendid - thanks again Mike. You remarked before about the workaday sort of finish on these movements, and that's fair comment, but watching the re-assembly reinforced my impression that the design is really quite elegant. Relatively repairer friendly too. Off topic: I find myself in need of a bigger movement holder. This is what comes of having your head turned by pocket watches ... I'm tempted to stick it in the lathe chuck. :-/

@MyRetroWatches 5 лет назад

Thank you for your comment. With regards to the finish I would say its functional and well engineered, it does what its meant to do and very well also but compared to older 7### Seikos like the 7019 there really is no comparison, the parts have been "thinned" or made with nylon to keep the costs down. I have never worked on a Pocket watch and yes clearly you need bigger kit!

@JustWatches1 4 года назад

Thank you for these microscope oiling shots! I'm still just tearing down and rebuilding a few movements for practice, but really want to start cleaning and oiling (which seems like the hardest part of watch repair)!

@MyRetroWatches 4 года назад

Thanks. Just subbed to your channel. Oiling is not too bad with good magnification and the right oiler. I use either a black Bergeon or a black Bergeon erganomic, these are allot more expensive though. Anyone can do this its just learning a steady hand and practice. I have a video called Watch oiling experiment which I would recommend as I show no oil, too much oil and just right and the effects that has. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dGPSPNmh-dE.html

@JustWatches1 4 года назад

@@MyRetroWatches Thank you for the sub and the link to the oiling video! I am going to order some of those supplies soon, I'll let you know how it goes :)

@4427126 5 лет назад

Hi! I not speak, about the watch, is a common moviment.But your work with the camera, the style to speak, and the post edition, is the best I saw in all WWW.THANK YOU!!!! I a watchservice, but only work with SEIKO vintage, Till this movement, And a collector too, I have, almost, one watch for each movement. Regards Marcelo

@MyRetroWatches 5 лет назад

Marcelo Perez wow this is a very nice comment ! I am not sure I am the best on internet ... 😳. I will take the complement thank you. I do like Seiko and my favourite auto is 6106 as a basic hacking movement . I have not worked on Chrono yet but have a 6139 here waiting for me to start. Your collection sounds amazing .

@4427126 5 лет назад

@@MyRetroWatchesIm a SEIKO VINTAGE COLLECTOR, and A GOOD WATCH REPAIR, but only in SEIKO moviments. 66 to 7Sxx, because is enougth. And I like ti see videos like yours!! I saw a lots, bad cameras, novements, out focus, te guy speak in hi speed or like a stupid boy.If some day ,I have time, I make one about a 6139 and 6138, becouse , I never see in the www. You know how calibrate the chrono hands? is a bautifull moviment, but need to many time for make all de video.It's not easy, and I have 60 yo, and my eyes… I say again, thanks for your time!!!

@MyRetroWatches 5 лет назад

Marcelo Perez the 6139 (helmet I think 7100) is in poor shape and I need maybe parts. I know a spring for the pushers. I have never done a Chronograph so have allot to learn but my understanding is the 6139 is not too difficult . I am ready for the challenge! You sound very experienced so I am surprised you would watch my videos .

@4427126 5 лет назад

@@MyRetroWatchesAll the people have some thing to teach, maybe you don't know what, but some time, we say Holly shit!!! because the "newby" do some tihng important, that we never think. Maybe how use a tool, or the adaptation for the table, or the way u used the twisers. You fin peopel who work in a dirty table, with dirty hands, never used "rodico" for handle some parts, etc. This is the reason for see, all the people make, Then you choose the best and follow. What can you do, the next...5 years?? I hope be there for see. Meanwhile, you can ask me, all what you need, and maybe you can't find in the WWW. Marcelo

@BillMrWild 5 лет назад

Nice one Mike, hey that main spring was well gungy look forward to the next one. Thanks for posting.

@MyRetroWatches 5 лет назад

Bill A thank you Bill

@-Dash- 5 лет назад

Nice. Looking forward to the next part.

@MyRetroWatches 5 лет назад

MeesterDash coming very soon !

@scdevon 3 года назад

Nice work! My main attraction to Seiko is how plentiful parts are for them. With Swiss brands, good luck getting even new packaged ETA parts anymore unless you have a "parts account". In-house movement parts for Swiss brands since 2015? Forget it unless you want to constantly buy parts movements. Japanese is the way to go.

@MyRetroWatches 3 года назад

Very true. What is happening with Swiss parts is almost a crime. The materials house here in uk cousinsuk has been in a court battle for a few years now trying to take them on! We can only hope they win.

@scdevon 3 года назад

@@MyRetroWatches Thanks for your insight. The reality is that you can buy OEM Seiko parts everywhere online whether Seiko approves or not and cheap parts movements are everywhere. In America, Otto Frei is in a similar situation. They advised that they are limited to the Swiss parts on hand and that's it. There will be no more. Swiss brands are making a huge mistake with hobbyists and enthusiasts. Great channel!

@ianmargetts4940 5 лет назад

Ahh great vid bro, you make it look easy....!

@MyRetroWatches 5 лет назад

Thanks as always Ian. most kind.

@a.aguilar 5 лет назад

Good work! You really amazed me installing the balance, I'm not close at all to your skill in that area. I need to improve that.

@MyRetroWatches 5 лет назад

Agustin Aguilar thank you. Balance can be a pain but if you can understand what I am trying to say in the video it makes them allot easier. Use a visor with 2.5x mag or similar , plenty of light and bring in the balance looking at the bottom pivot and the hole it goes in. When you can see the two it makes it so much easier. If the impulse Jewel is the wrong side of the pallet ( wheel won’t turn in both directions freely) then just carefully lift the bridge up a bit and turn the balance wheel . Works for me practically every time now.

@a.aguilar 5 лет назад

@@MyRetroWatches I've bought a visor, with it and your instructions now it's been much easier. It took you about 10 secs, for me it's 1 or 2 minutes now, which is very impressive! Thank you Mike.

@MyRetroWatches 5 лет назад

Agustin Aguilar your welcome . It’s all about sharing the knowledge! A visor frees up your hands and you only need around 2.5X for magnification . Makes most of a service allot more practical . Good luck .

@nemes15G 3 года назад

Hi Mike. I think you might have got the little star gear on the stem on the wrong way around. The plain collar should be facing out with the little studded side facing in and engaging the little studs on the non gear side of the clutch. I think 🤔. Maybe? Just looking at your disassembly video for reference on the position and I think its the other way around

@MyRetroWatches 3 года назад

You will need to watch all parts. My mistakes are always kept into the video 😉

@nemes15G 3 года назад

@@MyRetroWatches Always do. You're very helpful and work on the sorts of watches that us tinkerers actually tinker with. Star 🌟

@nemes15G 3 года назад

@@MyRetroWatches ..and now watching part 2... duh. I'll catch up at some point

@siclucealucks 2 года назад

yeah - service manual is showing it the otherway around...and otherwise theeth on the clutch wouldnt make sense :D

@JohnDoe-jn4ex Год назад

I gotta try fix old sk 007.

@giulianofiorotto3529 5 лет назад

Perfect video!!!

@MyRetroWatches 5 лет назад

+Giuliano Fiorotto thank you. Happy you found it useful

@Fernando-or2rg Год назад

I doit same, but wheel dont moove. Plis orientación

@spidiq8 5 лет назад

Cracking video, that was the worst caked mainspring I've ever seen, it's a wonder it could wind in there, I was half expecting a tanker to emerge from the movement.

@MyRetroWatches 5 лет назад

spidiq8 thanks. Yes possibly the worst mainspring I have seen. How all that oil got in there is beyond me. Regret not showing a before and after photo now . No wonder it was running so poorly before .

@WhoTFstolemyname Год назад

I realize this is an old one but I've been working through your old videos. Great info and much appreciated as a tool for a hobbyist! How do you keep the screws straight when cleaning, etc.? Are there generally only a few sizes? My current thought is to just use extra washing baskets and try and separate as much as possible, but is there a better method?

@MyRetroWatches Год назад

Personally I rarely clean screws. Never thought it was all that necessary given the threads are in the plates and only the heads run the risk of dirt. If I see any that I think need cleaning then into the machine they go. To keep track of them, as a beginner it could be advisable to place the screw back on the mainplate for cleaning so you dont loose track of their position and order.

@WhoTFstolemyname Год назад

@@MyRetroWatches Ah thanks! Great tip. I've seen you use the pizza pie parts container, something like that would likely be helpful.

@crumbums 3 года назад

How do you remember where all the parts go back

@wildernessofzinn17 Год назад

Seiko has a beautiful 7S26 watch out with a blue dial and cut crystal. It's quite affordable for as nice as it is. The SNKN03. It's a 7S26-04C0. Check it out on eBay or your favorite Seiko purveyor 😁😁⌚⌚.

@soumitrahazra7900 3 года назад

On my Seiko Watch ratchet wheel looks like scratch ,is it possible ?

@bernardocourrege6283 3 года назад

Hi! Is it bad for my SKX to stop/sit during a day/date change? I mean when the watch runs out of power and isn't being used and stops in the midst of flipping the date.

@dannyclayton6169 Год назад

Great video, what size is the cross headed screw driver to remove the Callander cover please.

@MyRetroWatches Год назад

I don’t know the size. Seiko will sell you a tiny screwdriver but I just took a .6pm and filed the corners

@dannyclayton3201 Год назад

@@MyRetroWatches thank you for the reply.

@zero-point3930 4 года назад

You forgot to put back the the second reduction wheel (which connects the "magic levers").

@MyRetroWatches 4 года назад

I mention at around 26 minutes that I have not fitted it and it will be fitted when u put the rotor on in the next episode.

@vext01 4 года назад

Thanks for making this video. I was wondering, what oils did you use? Thanks

@MyRetroWatches 4 года назад

hello, the main oils are Moebius 9010, D5. 8200 for mainspring an 8715 breaking grease on the barrel wall. Thanks for watching.

@leereyno 4 года назад

@@MyRetroWatches What oil did you use on the exit stone?

@VintageDigitalWatches 5 лет назад

Wow, very nice footage, what camera are you using Michael?

@MyRetroWatches 5 лет назад

Vintage Digital Watches I do all my filming on my iPhone XR. The microscope shots were on an iPhone 7 setup in a holder. All done in 1080p 60fps. I lose some resolution in digital zoom either from the phone or in edit.

@artl52 4 года назад

@@MyRetroWatches I'd be interested in your video setup. How do you hold or support the iPhone overhead while you are creating video. Thanks for excellent tutorial, superb "filming" and overall class. I'll be watching more of your vids.

@hendlers7071 5 лет назад

HI SIR, WHAT KIND OF MICROSCOPE DO YOU USE?? - TANKS FOR YOUR GREAT VID'S!!!!!!

@MyRetroWatches 5 лет назад

Hello thank you. I use this scope amzn.to/2Jp1xwv

@karlschneider6612 4 года назад

Hi love your work just a quick question I have a Seiko 5 7s26b but the hands will not stay on a slight nock and thay cum off. So can I put a 7s26c in its place or what can you recommend thanks Karl

@MyRetroWatches 4 года назад

If the hands are not staying on they are either not fitted correctly or are the wrong size. I cant see how another movement would help unless what you have is not right and using some parts from something else which would make the hands to fit so loose.

@nathancaswell4087 4 года назад

Hi mike what sort of magnifier do you use .?

@Andrewf73 3 года назад

When you put the balance wheel back into place, does the pallet need to be at a certain angle (up/down/centre) or does it just kind of "find its home" Which part of the balance wheel engages with the pallet? Thank you :) Learning lots!

@MyRetroWatches 3 года назад

does not matter what side the pallet is on as the impulse jewel on the balance wheel needs to fit in the fork. if it does not then the watch wont run and you will feel if you try to turn the balance that there is resistance because the impulse is pushing the fork from the outside rather than in. To put on a balance can be tricky at first if you are new. Just never force anything. I try to look and see the balance staff at the bottom, then I can see that I hover it to the jewel hole and lower it in.

@Andrewf73 3 года назад

@@MyRetroWatches Thank you for taking the time to reply. Really helps my understanding.

@LMF5000 4 года назад

At 16:01 you positioned the magic lever correctly, but by 16:45 the left half of the lever repositioned itself to the left of the brass stopper pin. I noticed that you then corrected it in your second video (with magic lever correctly positioned to the right of the brass stopper). Did you disassemble the whole bridge to do that, or did you bend the lever up to move it over the pin?

@MyRetroWatches 4 года назад

I just lifted it over the top. Happens a lot for me on 7### Seikos

@LMF5000 4 года назад

@@MyRetroWatches Cool, thanks for answering :)

@yourjhay 2 года назад

hi does the rotor have a chance to over-wound the mainspring ?

@MyRetroWatches 2 года назад

No. an automatic watch does not have a hook on the barrel wall for the mainspring to sit in. On an automatic you use a type of grease on the barrel wall. the mainspring will slip around at full wind rather than snap.

@yourjhay 2 года назад

@@MyRetroWatches Thank you very much

@ec-hi1br 5 лет назад

In what year we have the movement 7S26 on the Seiko 5 automático ? Thanks !

@scdevon 3 года назад

I think about 1988 through 2011.

@eliotbouvier3710 4 года назад

hello, I have a small problem, when I replace my balance wheel, the escapement works well but when I return the mechanism (in its working direction with the calendar up) the escapment stops. I don’t know why anyone could help me? thanks in advance

@MyRetroWatches 4 года назад

This is a difficult one but might be the balance / hair spring. if the spring is not flat then when turned the opposite way can touch on the bridge stopping it from working. equally it could be the balance staff is bent or broken so when you flip the movement its not in its pivot so out of position making it stop. I would try to examine with a loupe the spring in both positions to see if its moving when you turn it over.

@eliotbouvier3710 4 года назад

Thank you very much for your answer. I need to look in more detail but it seems that the problem comes from the airspring that touches different places