Seiko 7S26 Watch Service. Movement Disassembly Tutorial (SKX)
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- Опубликовано: 21 авг 2024
- This video is of the disassembly of a Seiko 7S26 movement as part of the watch service procedure. A very popular movement that is found in many Seiko watches and most notably the Seiko SKX. This was my first time inside one of these movements so I take you on my journey into the unknown! The aim of my channel is to try to inspire more people to try watch repair for themselves as a hobby.
I found the movement to be typically Seiko and well made although compared to the 70s Seikos I am used to these seem to have more nylon parts and thinner material. I guess this is progress for you.
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Hello, greetings from Pakistan. Today is my first day to came across your channel & subscribe with bell on. Am watch collector & admirer of Seikos. There's no honest watchmaker to find around, so am trying to fix, service & lubricate my collection. You are an honest person who clearly admits to get a small commission fro Amazon. Thanks for your guided material. Am a retired person trying to learn⌚
I am going to service my one, will be my 1st venture into watch repairs. Bought all the tools and oils etc and watching this series diligently. What could possibly go wrong🤣
how did it go? I am in the same situation but I don't think I am ready to jump in my skx :D, maybe try an old watch instead.
You make it look so easy, I tried to rebuild a module from a Ulysee Nardin, it was a mess, and I had watchmakers all around me helping. You are talented
Jack Purcell thank you for such praise. Not sure about the talent though . Just practice.
You sure made a lot of progress in only 4 years :) Better cameras etc too. :)
Brilliant job mate and thank you for working on it for me. Your videos really inspire me to try more myself .
alan776600 no problem Alan. It was time I got one of these oily watches in RUclips. I’ve done probably 5 now full of oil. Yours was not that bad compared to that Longines I posted on a while ago.
We will soon have this one running smoothly again so stay tuned for the rebuild video coming soon!
This was genuinely fascinating and interesting. Thanks for taking the time to explain all the various steps involved.
Thank you for commenting and your kind words. Glad you enjoyed it .
Nicely done, Mike. I enjoyed this very much as I am beginning my own journey as a watch tinkerer. You DO make it look easy and I hope with lots of practice I will have the confidence to dissemble and reassemble a movement without damaging it or losing any parts ;)
Great video. It reminded me of the time a mate of mine who knows nothing about cars tried to check the water in his. He removed the oil cap and filled it to the top with water.
So cool.Just learned more here than I have collecting for the last 5 years!
Robert E wow Robert that is a statement. Really happy you have watched and learnt something. It’s the whole aim of my channel. This is part of a series so there are the reassembly videos with the end result. I appreciate my videos can be very long but perhaps you would also find those interesting.
Thank you for taking the time to comment sir
What a wonderful journey! thanks for the ride! I have my seiko movement but it's really old and for what i know, never had a service sadly.
Thanks Mike, great video. Seems daunting to put back all those parts in exactly the same positions again.
David Hammond hello David . The more you do the more straightforward part placement becomes .
My Retro Watches using your videos will certainly help my friend, keep them coming.
Great video, thanks for taking the time to do it, cheers, Mark
Thank you.
I have a 7s26C about four years old, and the outer calendar works hold-down plate is quite different from yours. For one thing, it doesn't have that special screw that you had to modify a screwdriver to remove, just four regular slotted screws, which was nice.
The groups mentioned are great.
Thank you Mike. I guess with all that oil, it did inhibit any corrosion from moisture……just trying to look on the bright side. Very nice work and very much enjoyed watching!
My dad was a WD40 man, but fortunately he confined his attentions to clocks. :-)
Many thanks for this, Mike. I have one which needs servicing but have taken the view that it's best put off for as long as possible. Doesn't look especially daunting now though, because there's such a strong Seiko family likeness. Judging by the video it does look like the standard of manufacture is more functional than in the earlier movements, but there's an elegant simplicity to the design especially of the calendar works which looks like an improvement. All very interesting and helpful.
GenWivern2 Thank you! Oil overkill on this one . Glad you found the video useful. Need to clean then film the rebuild.
Very traditional Seiko in my opinion but just looks slightly cheaper parts.
Lol, can't sleep so binge watching your vids as I regulate a Komandirskie, it runs insanely fast and noticed not the fine adjustment arm but the main arm had been moved round like 60 degrees so took my good Amphibia out, looked at the angle of the main arm on that and rough set the Komandirskie's arm to roughly the same and the balance wheel is running a whole lot smoother but time will tell, set it to IAT at 0230am and will check it in 12 hours to guess how much its gained then if I can get my feeble brain in order I might be able to use the magic of maths to work out the angle fore or aft to bring it in to the area of the fine adjustment.
Hi Ian thanks for your comment. Are you using a timegrapher? usually if a watch is running very fast there is a good chance the coils are touching on the hair spring.
Thank you for the great video
Just wathcing this is a pleasure
Another great video Mike, as usual.
BeKinder DesignChateau thank you so much.
Super stuff mate, I'm learning heaps of valuable tips and info from your videos
Big Like👍
Wow thanks !
Subscribed! Thanks! Let’s do a Silita next!
skx171 is my favorite, great video
Thank you.
Reminds me of my daddy's theory, "If a little oil is good, a lot of oil is better". I remember he once oiled a rifle so much that the oil soaked into the stock where it joins the receiver and stained it.
Sometimes less is more.
Thank you so much for making these videos. I'm using them as a guide for my seiko 5 that I'm working on right now. Stuck trying to get that 0.8mm phillips out. I've ordered a 0.5 mm flat blade and I hope that will work.
Lee Reynolds thanks. For that screw I took my smallest flat blade and filed the sides to fit. Works a treat .
Good luck with your project
This is satisfying to watch Mike. I am here since I have a similar movement and have started to disassemble mine. My 7s26 is not winding for some reason. When the oscillating weight is attached, I noticed that even though the first reduction wheel moves along when the weight is rotated, the paw levers are not grabbing enough the second reduction wheel's teeth and resulting for the ratchet not to turn and wind the spring. But if I take away the oscillating weight and manually rotate the first reduction wheel, the paw levers are doing its job pretty well. I'm thinking it could be the angle of the 1st reduction wheel has to do something with the way the paw levers work. I am a tinkerer so I would do what I can to try and fix this (or replace some parts) so I can save some money going to a watch repair shop.
Very nice disassembly.
very nice disassemble sir see you more
Francis Oblena thank you.
I was waiting for this one. Cheers for showing.
MeesterDash no problem. Thank you.
good stuff mike keep it up
Wow...!!! 👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻 Thanks...!!!
Great video. The 7s26 is a good movement, very nice to work on, I've done some of them over the last months, but not as oily as this one, it sure needs a cleanup :-)
Ole Johan Pålsrud thank you. I found the disassembly very straightforward except the parts jumping out when I removed the setting lever spring!
Hopefully the rebuild will go smoothly and video well.
Wonderful Thank you:)
Hello ThE Real MB! Is that a glass of wine or Moebius back there?!?! BTW... this ViDeO is REALLY clear and bright. Well lit! Well done as usual.
Robert S Shiraz. Do like my Red pal.
@@MyRetroWatches I love ThE ReD, too. But the Sulphates HATE me. So I stick to ThE Whisky. Neat, please! ;)
HI,! i''M a SEIKO VINTAGE collector, starting at 66 movement, till de first 7Sxx.
You do a excelent video work, many peopel DON'T know how many time it's behind, this!!!
Now I looking all yours videos, and I hope find a 6138 (fucking) movement, its very hard to finished the Damm chrono...
Any way, big work!! and thank for you time !!
Marcelo
I have, almost 200 SEIKO, but in all the hole collection, THE 6138 PANDA, for me is the most beautifull, and the "baby PANDA" TOO.
REGARDS!!!
Thank you for your kind words. Your collection sounds very good.
I have no video on Chrono yet. Still learning those movements . I can only video on movements I am confident about .
Panda chrono are very nice !
Nice video Mike. Did you try demagnetizing the movement? It is amazing what you see after a watch is sent through the postal system. I have seen many that have become magnetized in shipping.
Thank you for the always helpful commentary, which is often lacking from the servicing done by more professional folk. As regards the camera getting in your way, might I suggest you consider moving the camera such that we (the viewers) look at the process slightly from about the 11 o'clock position in your standard field of view? What happens then is that you can better see what you need to see, and we look from beyond your left hand as you dissemble and assemble. Obviously, from too far away, we lose the fine detail, so not too far off dead centre above the watch, but a little to the North-north-west of the compass centre? Just a suggestion... No offence meant - your videos are always very helpful.
No offence taken sir, always open for advise and criticism and can get everything thrown at me in the comments section... Camera angle is always hard, some people dont like how I do it but my thoughts are that the overhead shows how it would look if you are doing it, so If you were using the video as a tutorial you have the right orientation on the screen to your bench. If I ever invest in proper DSLR camera and equipment then I might be able to find another way but that is a long way off as the channel does not make any real money to throw investment into it other than how I am doing it for now. In my recent "Pogue" video I do change to a B roll here and there for the viewers experience although this has then made editing twice as long...
I will keep trying to improve is what I think I am trying to say.
Thanks for the info regarding Seiko manuals.
Ya know, these (hundred dollar) Automatic Seikos are designed to run for 10 to 15 years with no problems or maintenance. I get a laugh when it is recommended to service these every couple years!
-Just buy a new one, LOL.
/R
Basically like the NH35 but without the main bridge.
Nice video, like
Morteza Saremi thank you sir.
Looks like the Amaco cadiz in that 7s26 mvt! They’re not pretty as you say mikey, but how many have they banged out??
They are indestructible really, Even that one swimming in oil still ran reasonably!
Another interesting vid as well bro...
Ian Margetts thanks as always Ian. All the Seiko movements are robust I just feel that in these there are quite a few plastic parts which will age badly and go brittle unless it’s some good plastic
Hi mate,
Just Googled the 7s26 and your video pops up 😅 is there any movement or watch you haven't worked on 👌 great video as always. Keep up the great work 💪
Haha plenty I’ve not covered yet!
I wish the timegrapher company makes it play "Jingle Bells" when the watch is in snow globe mode :).
Yu Zu haha
Hi Mike. Love your content. I have a 7S26 movement which was not working. I was disassembling it while watching your video and when I was removing the dial, I heard a sound and I think it was watch unwinding suddenly ( I had the hands removed by then). I heard it twice I believe and also vaguely saw date changing (I think ... all this was quick and sudden). There was no sound or feel of any part dropping or flying. I wondered a little but then I kept opening the movement. When I reached the part where I had to manually unwind it, I saw (not surprisingly) that that there was no Click to hold the watch from unwinding. Although it all makes sense (that the Click spring dropped and watch unwound itself as the balance was already removed) , I am really puzzled by this. I never heard saw/felt or heard any part dropping/flying. Secondly, the click should not drop unless I have removed the gears from the back of a watch but the only two things removed were the balance wheel+pallet fork and the rotor. Being new to this, I thought to get yours (others) opinion on this incident. Since it was my first time, I was very very careful in each step but I never thought (because I watched about 10 videos before I opened this movement) that the Click would go out like that as it can not drop out while the Barrel and Train Wheel Bridge and Ratchet Wheel are still in place. Can you (or any other veteran) could solve my puzzle? Thanks
You should not remove the pallet fork unless you have taken all the power from the spring.
If you have not taken the power out then the watch will wiz around until it’s ran out of power.
The pallet fork is the break to control all of this.
@@MyRetroWatches You are correct. I first moved the pallet fork left and right but it did not click , the escapement wheel did not move so then I removed it thinking there is not power. It did not unwind when I removed it, it did unwind way after that when I was removing dial. BTW, I am stuck at the removal of that notorious small Philip screw :(
What a great video. I hope to be able to try this myself one day on my SKX. Came across your Facebook group today when I was trying to find more information on my beloved 7025-8100. Look forward to learning more and contributing.
Hello Mark thanks for finding my channel. I do have a series of videos on the 7025 so please look at my playlists. I am sure I will see you in the group.
I think the last one working on that watch used Marmite instead of oil :)
My watch has stopped moving and through the case back, I can see that the "heart" is not "beating". How do I fix this myself?
Kon F2P I have an SNXS73 that did the same. Did you figure out what to do?
If you’re referring to the balance wheel that springs back and forth really quickly, you can purchase that part and replace it if you can’t disassemble and service it yourself. Otherwise, it could be the spring has bent or broken, the wheel might have warped, the jewels might need cleaning and lubricant. Or all of the above.
@@whatsstefon oh hey, the watch actually fixed itself after i accidentally dropped it xD
Had the same problem and it turned out that the rotor needed tightening. Back to life
Oct 92
Thanks for the video. Really helpful. Will go through the rebuild steps with you on your assembly videos.. so much easier than trying to follow a technical sheet. Ps. How long did it take you to notice Disassembly is spelt wrong and say "Doh!"
Where is it spelt wrong?
@@MyRetroWatches On the thumbnail ;) Disassmebly
@@nemes15G thanks , I hadn’t even noticed!! All changed now!
@@MyRetroWatches 👍 Great channel in fairness. Keep up the good work.
I'm watching the video well in South Korea. You watched the 7s26 movement overhaul video well. Watching this video, I would like to overhaul the 7s26 movement for fun. I have a question. I want to know the size of the minus screwdriver required to overhaul the 7s26 movement. I hope you tell me. The tools are so expensive that I only want to buy the size I need.
Really flooded this movement, Mike. BTW, is there a new toy behind you?
Well spotted!! Yes it’s a fully restored Brenray watch cleaning machine! Something else I plan on doing a video on soon too.
i have 16 year old daughter and she has hawk eyes she can find anything iv never dropped a part that she cant find ,see kids are useful not just a headach lol
nick kendall haha that must be very handy. I tend to find most things plus I have built a 1” tall wooden frame that fits around my mat, I use that if I am worried about a ping or I am working on a movement I’ve never done before. I also now oil cap jewels in a small container to limit the chances of loosing them. It’s jewels I can never find and are hard to replace .
Do you have a method for keeping the screws straight? It seems like it would be easy to get confused about what came from where. Also, is this a 7s26 a, b, or c?
This video is old so I can’t remember the version but they are all pretty much the same 7s26 & 36
Screws I just keep to the parts they belong to in my parts trays however I’ve done so many seiko I now know most of what goes were screws wise.
Hi are you still servicing watches, I’ve got an SKX that needs help, a new hair spring and time correction.
Thanks in advance
I have the same size screw driver and its too big to get inside the rotor screw.
Then it cant be the same size on the blade width. Scredrivers are measured by the width of the head not the thickness of the blade. My only suggestion is to try a smaller driver or grind the one down you are currently using so it fits the slot. Thanks for watching.
Most don't work on these movements, as it costs only $50 to get a new NH35/36 with hacking/hand-wind instead of $75 of manual labor to repair. Basically, drive the 7S26 into the ground and throw it away for a new NH35/36.
Yes allot of people do this. I am not one of them, I can service my own watches so do not need to spend any money. Others like this one was my friends who is a big Seiko collector he would want it all original rather than swapping out the movement.
@@MyRetroWatches so if I need to replace the movement on the 7s26 that I just bought (it a purchase without seeing inside) can I just drop in a NH36/36???? do the hands fit?? thanks for all the fab vids I really enjoy them,
I have a manual wind Seiko. One of the time marker bars at 9 oclock had come lose from the face. How should it be put back?
I have a seiko 6139-6002 and it works fine except the date dial is not working, would this be a easy fix if so where could i get it done.
Ok followed this tutorial, I have a dozen parts here in front of me. Is there a part two?
otto16121970 there is an end link at the end of the video to the first part of assembly. This video is just to disassemble.
Here is the playlist.
ruclips.net/p/PL1QqBaAlwtP42AAxTxfJ35VMTW2NneNTz
how do you keep track of all the screws and small parts
Hi! A kind question, I have a snk803 (7s26b).. though it works fine (very accurate for my standards) while wearing it, it seems to only run 2-4hrs of power reserve when I don't wear it.. what seems to be the problem with it? I believe it should run at least 40hrs of power reserve right? Thanks in advance and hope to be noticed..
Who knows could be many things but as it’s not winding much you should take it for a service .
deberias traducirlo al español aumentarias mucho las suscripciones
Thanks for a really helpful vid! I just want to as, I am looking at my 7s26 in my seiko 5 and the 2 levers that activate the winding are the opposite way round to what you have here. Do you think it matters? It keeps great time but I have had a power reserve issue since I got it. I have never opened it. Its as it was when I bought it.
Thanks
That is possibly your cause. When you move the rotor in each direction you should observe the levers working and the ratchet wheel moving.
@@MyRetroWatches yes it does work it just doesn't live up to the reserve that they say it has. I am skeptical of all the power reserve times to be honest. I have 5 seikos and none of them seem to last the weekend if I leave them. Thanks for your reply. Great content on your channel for us beginners! 🍻
Looks like the major difference between these and the 1970s Seikos is just cost reduction through less complicated machining.
hi,
I have a seiko presage and i noticed it has a plastic retaining ring / movement holder.
Will a plastic not hold as long as metal? I doubt it was chosen for shock resistance.
Thanks!
Seiko have used metal and plastic movement & dial rings over the years. Typically on 70s watches I work on the plastic ones are often broken.
Is there any harm done if an automatic stops (power runs down) during a day/date change? For example, a Seiko skx, which takes 5 hours to complete the whole day/date change.
No it will be fine.
Hi, can you tell me what the problem is with the Seiko 7S26, as it stops when I take it off and lay it down for a few mins
Hello. Do you know if dial from this movement can fit to a 7009a movement? What kind of dials can i swap in a 7009?
Is it possible to replace a 7009A movement by a 7s26 ?
What are purple parts?
My whole reparation is on stoped because that darned tiny almost invisible last screw on the front, the star one, there is no way to get to it. It is to small.
which size of screwdiver you use by the crossheadedscrew at the calendarworks ?
I just filed the corners off a 0.6mm flat head driver to fit the screw.
Exxon Valdez.
Hello Mike:
Where can I find the service manual of the wacthes?.
I have some of them, but I can not find anaything about Casio.
Do you have any favorite web site?
Thanks
Hello Sir. Thank you for your comment. Casio I don’t know , especially if it’s analog . Forums are good and my Facebook group members help plus we have a files section full of data sheets on all kinds as members upload them .
For many Seikos I go here, you may have to join the forum to view.
www.thewatchsite.com/14-user-manual-technical-manual-casing-guide-downloads/15-seiko-calibers-technical-repair-manuals.html#/topics/15?page=1
:)
Hello, are the 7s26 and 7s36 Movement durable? How long is the livetime?
Roy definitely. I’m not sure how long they have been around for but a few decades. Seiko used then in lots of models.
Basic but refined so as long as serviced every 10 years you would not have much problems with them .
@@MyRetroWatches Thank you for your prompt reply. Would it be more durable if the clock didn't run every day? Does it damage the watch if you rarely need it?
Roy how there’s a question! Usually a debate on this.
I personally leave them unwound.. I have so many that a winder would be pointless.
Two arguments , if they are running they stay lubricated so run good.
Staying unwound prevents wear and tear to the movement so preserves the life of the components .
Leaving for years though is bad because the oils will start to dry and seize the movement .
Again that said for me this is good as I buy watches like that all the time. 40 year old Seikos never been serviced. You service them and they run perfectly. It’s possible that for 30 years they sat in a drawer ...
I've had two and they only worked for four months.
My rotor screw is very tight any suggestion to remove it. I already broke 2 screw drivers?
They should never be so tight. I cant really help to advise other than put some tiny drops of oil on it and leave it to soak on. They are only held in on a few threads.
@@MyRetroWatches tks for ur reply. Have u changed a balance wheel on a 7s26? I think I have to replace mine. It seems to be snap in place. Tks
Adrian Cho I have but it’s been a while. Changed the balance wheel and hair spring complete and fixed onto a new balance cock. There would be a screw on the stud to remove the spring , then move the regulator arm out the way
I manually wind my movement but the power does not go through to the balance wheel. Please can someone help me?
are you rebuilding yourself?
My Retro Watches yes I am rebuilding it myself. I forgot that I had to slightly push the balance wheel to get it to start. It has been working for over a day now but it seems that the balance wheel is moving slower than before. Do you know the reason why this is happening or do you know how to fix it?
Thanks
7s26 x 7s36?
You cant beat a few ml of 3 in1 😄
Helicopter Pad haha indeed. Has 100s of uses but pouring into a watch is not one!
How about a magnetic screwdriver?
You don't want a magnate any where near a watch movement. Magnetism of parts is a real problem as it can play havoc with the hair spring. I have read before watchmakers finding magnetised screws that meant they could not regulate it properly. Good practice is to demagnetise the watch on assembly.
Do you wanna sell that dial?
Randy boi sorry No. it’s not even my watch .
You've given tattoos before, haven't you?
your always complaining of your fingers being in the way of your shot, and they are constantly taking the camera out of focus, look at other watch makers videos, most have their camera set up at a 45 degree angle where the camera faces towards them . avoids that problem
This is a very old video. I now have a different setup and a proper camera I don’t have allot of room on my roll top bench to do angles (see more recent videos). Thanks
Whomever put that oil in there should stay away from the inside of watches.
Очень нудно и непонятно, есть более простые видео.
Half of the video we look at your fingers. This is terrible! The camera should be placed a little to the side, not on top, so as not to cover the lens with your hands and fingers.
No ones perfect. You are limited on space as I also need to see what I’m doing . Sorry you didn’t like it but I disagree it’s not terrible.
Please clean your fingers before pointing them at the camera, this is disgusting.
Then don’t watch it I’m not forcing you to.
Nylon gear that's real junk
John Pinner it is not uncommon to see them as intermediate wheels for the date driving wheel on Seiko 6309 & 6119 from the 70s . It’s hit and miss if the movement has steel or nylon. Have to say the nylon fair well in 40 years.
Just looks in this more modern 7S26 they have gone mad with them .
Thank you I'm still stock on the 60's with my Omegas