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Longines moon phase chronograph balance wheel stopped


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6 hours ago, Klassiker said:

Well done! Most likely not a case screw through, and now missing from its proper place in the movement.

That’s what you’d think but in fact it was a case screw just above the escapement wheel on the perimeter and I popped it in.

No screws missing this time!

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1 hour ago, Jon said:

Well done!

Thanks for all your help and advice Jon.  I am not ashamed to say "if you can't be good, at least be lucky".  This applies for me in this case.  Thankfully, Longines was in no rush to send me the repair packaging which made me even more desperate and  therefore adventurous!

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@nickelsilver or someone else, can you describe the tools and procedure for checking screw torque in a movement?

I've never seen or used a torque wrench smaller than about 20cm in length,  there must be watch-delicate torque screwdrivers.

When we torque bolts, it's our standard procedure to mark the bolts so we know they are torqued. Are torqued movement screws not marked because that would marr the jewelry, or because these are non-critical components, and because the customer pays for the consequences? This problem should only happen once ever, then the manufacturer puts into place procedures to prevent the problem in the future.

 

I guess it's these "dynometric torque cylinders"?

https://www.cousinsuk.com/product/screwdriver-dynometric-torque-cylinders

 

Not cheap at all! and you have to buy a different one for each torque setting, yikes

Edited by KOwatch
more info
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    • in general this shouldn't be any change. but in general questions like this it be nice to know the specifics of the watch in other words how was it performing before it was cased up and what is it doing now.
    • just as a reminder this watch is a Swatch group product. This will bring up a problem like spare parts and technical information. that I found some links to some information on when I talk about your watch and some of the technical and basically your watch is equivalent to 2834-2 for which I'm attaching the technical sheets. But equivalent does not mean exactly the same you want to do a search on the group for C07 as we discussed this watch before including the technical differences how it's supposed to be regulated and basically because it's watch group there is no parts availability. https://calibercorner.com/eta-caliber-c07-xxx/   https://www.chrono24.com/magazine/eta-movements-from-the-2824-2-to-the-powermatic-80-p_80840/ https://www.watchuseek.com/threads/h-10-movement-details.4636991/ eta CT_2834-2_FDE_481857_15.pdf
    • people be honest.... Swatch is evil for the watchmakers and repairers, BUT not everything in watches from Switzerland is from the Swatch-Group. As far as i know, Selitta got sacked by Swatch as a Movement-Assembler for them and they started to produce Movements in their own Name with slight Modifications. As far as i know, they sell Parts to the Market for their Movements. In most cases, if a ETA-Movement fails, it is a valid Option to replace it with a Selitta Movement, which i consider the Solution for this Mess with the Swatch-Group...... I have no Connection to anybody at Selitta, but being a Swiss-Guy, i still like to have Swiss-Made Watches, but not from the Swatch-Group.   ok ? regards, Ernst
    • Just one more greedy act by Swatch. They started a number of years ago here in the US..cutting off supplies to watchmakers that could build complications that many Swatch houses couldn't even touch. Old school masters who had gone through some of the most prestigious houses in the world. Otto Frei has some statements on their page about it. I tell all my customers to avoid new Swiss watches like the plague,..unless they just want an older one in their collection that still has some parts out on the market, or they have really deep pockets and don't mind waiting months and paying through the nose to get it back. Plenty of others to choose from..IE Seiko,..or other non-swiss brands Even a number of Chinese brands are catching up with the Swiss,..and I think that in time, their actions will be their downfall
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