Vostok 2414A

[fjseal]

The above mentioned Vostok movement will run all night 'dial down,' but as soon as I turn it over 'dial up' it stops. Can anyone think of anything that would cause this. I have checked the shock jewels and tried swapping them over but no success. Can there be anything obvious that I am missing?

[nevenbekriev]

The first thing to check is hairpring side balance pivot

[rehajm]

Yah the pivot…and end shake?  The balance drops a bit and fouls, maybe the staff above the pivot on a deep jewel setting or the roller on…something…there’s also the always fussy center pivot spring and the third wheel contact with center seconds and fourth..

Edited October 25, 2024 by rehajm

[Neverenoughwatches]

11 hours ago, fjseal said:

 I have checked the shock jewels and tried swapping them over but no success.

Hey, this may mean two things. 1. You turned the cap stones over in their respective settings, so which way are they facing now ?   Or more probably you mean you swithched top and bottom with one an other.....top and bottom cap stones can be of different thicknesses...so i would switch them back for now until you know for definite that they were the wrong way round before you switched them. So dial down runs and dial up stops, something is increasing the friction in this position and you just need to find out what that is. Be it excess endshake in the escapement causing interactions to fail , such as the pallet fork gaurd finger and impulse pin, hairspring touching something...are all the trainside pivots  clean and ok ?..in particular..the escape, the pallet fork and balance, are the endstones ok for these as well ?

[VWatchie]

25 minutes ago, Neverenoughwatches said:

top and bottom cap stones can be of different thicknesses

I'm almost certain that the cap jewels have the same thickness on the Vostok 24xx movements. Either way, it shouldn't cause the balance to stop oscillating (you don't say, just mentioning it). Most likely the balance staff pivot that goes into the chaton on the balance cock is broken off, but great that you list a variety of other possible causes!

[Neverenoughwatches]

10 minutes ago, VWatchie said:

I'm almost certain that the cap jewels have the same thickness on the Vostok 24xx movements. Either way, it shouldn't cause the balance to stop oscillating (you don't say, just mentioning it). Most likely the balance staff pivot that goes into the chaton on the balance cock is broken off, but great that you list a variety of other possible causes!

Without checking on this movement i didn't know H , just a mention that top and bottom cap stones can vary o  vsome watches... no I'm pretty sure that wouldn't change any heights more to do with how the shock system works. Having a bit of a list for OPs gives them a few things to look at before coming back, its always nice when they do to say " ive found the problem...it was ...........

[VWatchie]

3 minutes ago, Neverenoughwatches said:

more to do with how the shock system works

Yep!

[Neverenoughwatches]

Personally i dont think its good to give OPs direct answers, i think you as a teacher know this, point them in the direction they need to go and let them find the answer themselves....much better way to learn imo.

[nevenbekriev]

On 10/26/2024 at 10:44 AM, VWatchie said:

I'm almost certain that the cap jewels have the same thickness on the Vostok 24xx movements.

Yes, this is true for all USSR/Russian watches. They never did different cap stones, settings and shock springs for the main plates and balance bridges.

Edited October 27, 2024 by nevenbekriev

[VWatchie]

11 hours ago, nevenbekriev said:

Yes, this is true for all USSR/Russian watches. They never did different cap stones, settings and shock springs for the main plates and balance bridges.

That makes a lot of sense and fully aligns with Russian/Soviet thinking—functionality at the lowest possible cost.

[Neverenoughwatches]

22 minutes ago, VWatchie said:

That makes a lot of sense and fully aligns with Russian/Soviet thinking—functionality at the lowest possible cost.

In the labour market, thats known as " an apprentice "

In Russia, if it can fly....attach a missle to it....those poor Russian pigeons