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Balance wheel issue

MarkF
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MarkF Member

MarkF

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I just serviced a new ST36 movement to get it well oiled and ready to put into a new case. 
Everything went fine - oiled both incaclocs and reinserted them. When I put the balance wheel in it swung freely and engaged the palette fork, so I inserted the screw into the balance bridge and tightened it. When I did the balance stopped moving. As I loosend the screw on the bridge about a quarter turn it started moving again with good amplitude. 
I have a feeling this is a common issue but I have no idea what is wrong. Is it possible to overtighten the bridge screw, or is something rubbing on something?  Any clues or advice is as always really appreciated. 

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MarkF Member

MarkF

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Turns out it was the incabloc. Not sure if the jewel was upside down on if it just wasn’t centred on the pivot. I took it out and the watch worked fine. So I cleaned and re-oiled it and carefully reinserted it, and everything works fine now. Problem solved. 

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