ETA 7750: Part 1 - Disassembly
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- Опубліковано 6 жов 2024
- Disassembly of a Tourneau ETA 7750 Chronograph Movement. This watch was having issues with intermittent stopping. Also, the day indicator on the watch was not aligned correctly in the day window.
16-Mar-2020: Some notes and corrections based on feedback from user CaptCalvin on watchrepairtalk.com.
05:50: It can be seen that the dial washer, or indicator distance piece, is missing
10:57: I incorrectly show how to orient the day/date driving wheels. The day wheel is correctly shown aligned to the mark on the movement plate. But the date wheel should be pointed at the post of the intermediate date wheel, not the cannon pinion. The intermediate date wheel sits between the day and date driving wheels.
20:27: The lock stops the movement of the chronograph seconds wheel - not the minute counting wheel
25:09: CaptCalvin suggests not removing tension from the cam jumper in this fashion. He suggests leaving the jumper in place and removing the cam screw. You should be able to maneuver the cam away from jumper easily. You can now remove the jumper. I will try this technique next time.
31:02: The fourth wheel appears to have been replaced, most likely with one from a Chinese clone such as from Dandong. - Наука та технологія
Just completed my first disassembly of a 7750 today and your video was very useful. Keep up the great work. Very concise.
Your way how you are explaining outstanding thanks a lot from dubai
beautiful work - a joy to watch.
Thank you for understanding my watch 😉
I actually know how hard this job is as I just did it a week ago. And is no joke
Just a constructive critique. Can you put the camera at an angle? So your hands do not block the view everytime.
Dude - cool video. I have a vague memory of a friend who was doing watch repair - was that you? I see that you have a bit of a following here - decent number of views on some of your videos. Nice work. And thanks for tuning into my channel. Truly appreciate it.
Excelente video me gustó 👌 muy bien explicado. Tengo una duda sobre este tipo de máquina , que es mejor para el mecanismo que se encuentre funcionando el cronógrafo o este parado? .
Talented.
Have a rotor where the edge displaces. You can see at start of video that thin strip on edge of rotor. Does that mean it's time for a new rotor?
Hi Stu-do you do repairs for other people?
Question. You mention around 6:00 that the dial is loose, and thus the day disc is as well. When I recently installed my first day disc, it clicked imto place, and seemed secure (i.e. not floating). It functions properly. Should it float, and be secured by the dial?
This video teach me service 7750.i follow this video service my fortis 7750
Telling us how to release the dial would have been helpful. We aren't all lucky enough to work on a watch with a loose dial.
Almost the same thing happened to my relatively new watch. The chronograph won't reset and later the movement stopped. I found a screw head stuck on top of the rotor. Is that a common occurrence on 7750's?
Same here but with an 'older' watch: 8 year old Fortis 7750 ... Gladly it was an easy fix (90 €) - first worse case estimation was around 800 € for a full repair. However I wouldn't have been mad - I work in the industry, the watch got no service so far and I use it DAILY (been to concerts and so on with it, too). 7750s are called 'tanks' for a reason :-)
@@Stag_Stopa thanks
Is it normal for screws to back themselves out on a mechanical watch???