Seiko 7009A 17J - Stops when shaken

[Rishah]

I have a beautiful Seiko watch with 7009A 17J movement (automatic), the problem is that the watch stops when shaken and does not starts again until shaken again. 

What can be the underlying cause and is it an easy fix. P.S. I am a novice trying to learn

[watchweasol]

Hi there could be several reasons for the watch stopping , from being dry/dirty and needing servicing to a mechanical failure for example a broken balance staff,   pallet/fork fault faulty wheel or wheels.    broken / damaged mainspring, the list goes on. Without opening the watch up the watch  and taking a look, sorry cant be more specific at this point   cheers

[Nucejoe]

If not shaken while runing, dose it just keep on running then?

[oldhippy]

It could even be a loose screw that is fouling the movement.  

[Rishah]

@NucejoeYeah if not shaken well it runs well

I opened the watch and all the screws are tight

There does seems to be some calcium deposit on the rotor

 

[Nucejoe]

I remove the rotor and put some naphta on screwdriver, gently smear each teeth of the escapement wheel with naphta and all jewels to the escape mech, that is jewels to the es apement pivots , fork pivots and balance pivots. 

Misaligned pallet jewels stops a watch on wrist and it can start to run again. we,ll get to that next.

 

 

[oldhippy]

The best thing is to have it all taken apart and cleaned. There is so much that can stop a watch, we can only make suggestions. A broken part can screw the movement up.