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ETA 2892-A2 Service Walkthrough


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27 minutes ago, Knebo said:

I'm worried that the pre-lubrication has dried out. 

The pack the part is in is oxygen free so it stops or rather slows down oxidation of the lubricant on the part. It is already a 'dry' lubricant, so is unlikely to dissipate like greases and oils. If the lubricant on the reversing wheel(s) has gone over time, you'll soon know when winding the watch and seeing the rotor spin as well. if that is the case, remove the reversing wheel, clean and lubricate. No biggie!

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Ahhhh, yes @Jon!!

That's the kind of knowledgeable answer that I was hoping for! Thanks a lot!

Indeed, I installed it as-is from the package and everything seems to be working fine+smoothly. No rotor spinning at manual wind.

Your answer now gives me confidence that I'll also work fine for a while (hopefully a full service cycle).

 

I will also quote your answer in another thread that I started around this topic.

 

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Wow i could have used this a dew years ago VWatchi! What a thorough walkthrough. When I did a 2890-2, I don't remember there being such a difference in some of the oiling of the train of wheels. I just do 9010 on them all. I do have a question for you and for anyone else.

I noticed that some of your parts have oxidized after cleaning. I have that issue sometimes and I'm not quite sure what causes it. I just did a Rolex 645 and had this issue on a lot of the pinions on the wheels. It seems to have definitely robbed me of some amplitude. I use an ultrasonic for all my cleaning, in addition to hand cleaning. Water and Liquinox. Then distilled water and a rinse in IPA. Sometimes it happens, sometimes it doesn't. Id like to be able to tell when it will happen so I don't lose amplitude. Does anyone know?

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7 hours ago, SwissSeiko said:

I noticed that some of your parts have oxidized after cleaning. I have that issue sometimes and I'm not quite sure what causes it.

I don't really remember, but I have it in my mind that I treated some of the parts of the keyless works with pure vinegar (24 %) to remove rust. I don't think you saw any oxidation on any other parts, did you?

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19 hours ago, VWatchie said:

Thank you for your kind words! 🙂

ETA2892A2.jpg.598fc9909877200b46d5a11229ee05ed.jpg

It's from ETA's technical documentation. Surprisingly, you can still find the latest versions of these documents for many, but not all, of ETA's calibres here: https://shopb2b.eta.ch/en/ I assume it's only a matter of time before these documents are removed. I've meant to download all of them but haven't gotten to it yet. As a backup Cousins has most of them, but not always the latest versions.

 

Oh boy!!!

Thanks again for your post of this. I hadn't oiled there and the watch was running fine anyways (280° amplitude, fully wound, dial up). But I now added a bit of 9010 at that point of the seconds pinion and amplitude jumped to 300-310!! Wow. 

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16 hours ago, VWatchie said:

I don't really remember, but I have it in my mind that I treated some of the parts of the keyless works with pure vinegar (24 %) to remove rust. I don't think you saw any oxidation on any other parts, did you?

I saw oxidation on some random screws here and there, and on the nickel(?) plated pinions that are on the train of wheels.

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19 hours ago, SwissSeiko said:

I saw oxidation on some random screws here and there, and on the nickel(?) plated pinions that are on the train of wheels.

Yes, now that you mention it, I probably used vinegar to remove rust on some of the wheels and screws as well. That's my only explanation for the oxidation.

On 6/7/2024 at 10:18 AM, Knebo said:

But I now added a bit of 9010 at that point of the seconds pinion and amplitude jumped to 300-310!!

That's great! It's easy to underestimate how critical oiling is. I suffer greatly when I watch many YouTube channels where they just slap on some oil here and there. They use the wrong amount and apply it in the wrong place (misses). No wonder we often don't get to see the results on a timing machine.

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3 hours ago, VWatchie said:

It's easy to underestimate how critical oiling is

..and how critical EACH oiling point is. 

3 hours ago, VWatchie said:

I suffer greatly when I watch many YouTube channels where they just slap on some oil here and there. They use the wrong amount and apply it in the wrong place (misses). No wonder we often don't get to see the results on a timing machine.

Absolutely. 

And many don't even show the oiling properly. They probably know this it's a minefield. 

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4 hours ago, Knebo said:

And many don't even show the oiling properly. They probably know this it's a minefield. 

Or they don't care or are blissfully unaware! Good quality oils and proper oiling techniques are the most critical aspects of a service.

Attached is a link where I allow myself to be uninhibitedly vicious! 😆

https://www.watchrepairtalk.com/topic/26353-whats-your-favourite-youtube-watch-repair-channel/page/2/#comment-218905

I even commented one of the videos with: "I really don't mean to be rude, but you're drowning that movement in oil. It's not going to run well or for long. You really need to do something about your oiling skills, or lack thereof."

Edited by VWatchie
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VWatchie.

I do have to agree with you. I started oiling 2 1/2 years ago. Looking back, I'm sure I would have filled the swimming pool. I now base my oiling on Adam's demonstrations of Weekend watch repair. Very lucid views.  I have noticed the differece in the final outcome of my movements. My preperation and cleaning is noticeable in what it produces. Good smooth wheel trains and easy controlled motion of the keyless. 

Yes I do, as I hope others do, take note of the comments of members. 

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VWatchie

I have followed Adam since his start just over a year ago.  His videos are full of information and usually diplay a full disassembly and build. What is interesting for us beiginners is that he shows screw removal and placement. Plus he talks about what he is looking for when completing the install of items. Also, he includes the errors so that we can see where not to make the same mistake. 

His oiling and cleaning process has altered. Less is more, but enough to be enough. 

Adam of 'Weekend watch repair' is a member of this forum and has given information freely to many. As do you members. 

I am doing another build of a Seoko Mellmatic 4006, so am using

https://www.youtube.com/watch?v=H2UOIUcUEYA&t=3290s

His latest shows the difference in his oil and cleaniing application.  Like him, I also have adapted. Don't have his equipment, but feature his system.  ish...

https://www.youtube.com/watch?v=_UCNqdRq6mI

 

 

Edited by rossjackson01
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