Seiko Calibre 4006 Escape Wheel Doesn't Stay In Place

[chriz74]

I have this seiko bellmatic with calibre 4006, the watch is not running. I disassembled it and found that the escape wheel doesn't stay vertical (meaning that the jewel is not holding it in place, so it pivots on it's base), so, as far as I can understand, it's not making contact with the hands wheels and so the watch is not running. However there's also something else, the watch winds but it doesn't unwind, I don't understand why. Shouldn't a malfunction like that of the escape wheel also make the watch unwind very fast?

 

Edited April 2, 2015 by chriz74

[Maurice]

Sounds like the escape wheel has a broken pivot. It may have snapped and the wheel is now dislodged jamming the gears!

[chriz74]

The fact is it seems not broken to me. Comparing it to the image in the service manual seems it's ok...

[chriz74]

Imagine it moves on the base like this -> V where the base of the v is the pivot and the V describes the pivotal movement in circles ... So it's the upper part that is not held by the jewel on the upper plate.

Edited April 2, 2015 by chriz74

[Geo]

The top pivot will be broken off or the top jewel has severe problems which is unlikely. :(

[Maurice]

At the apex of the V or inverted V for the top there should be a tiny spike That is the pivot... Or not if its broken, Very hard to see as its tiny you will need quite high magnification to see it!

[chriz74]

It seems there to me. Now I reassembled the watch. I will check it again in the next days and take a close up picture.