Help with balance jewels refitting

[andyr1968]

Hi there, I'm hoping that someone has the solution to my little problem. I have a Raketa 2609 HA movement that I've stripped and cleaned with a view to use it to practise stripping an reassembling. I haven't got very far with the rebuild. I have removed and cleaned the balance end stone jewels and oiled them and when I put them back in the balance ceases to move freely. When I removed them I didn't necessarily keep them apart as top and bottom so I could be refitting the top on the bottom and vice versa. I've removed and refitted them probably a half dozen times in various combinations and the result is always the same, the balance stops moving freely. I think that I'm refitting the jewels correctly ( I believe the flat face is the side that you oil ) and I'm certain that everytime I do it the pivots are placed correctly. Is there anybody that has an idea what I'm doing wrong. I've added a photo though there isn't much to see. Please help cos it's doing my cheese in!!!

 

[rogart63]

Flat side down is right? The rounded side of the endcap jewels should be up. 

Looked in my parts drawer and found a 2614HA . The endcap jewel on the main plate is 0,18 mm thick. That is only one i have as the balance is caput.  And it has a flat end at both ends? But one of the ends is beveled . Like in my picture . Flat side down. 

Hope it can help you anything? 

[fjseal]

Hi there,

This being a Russian movement there may be a shim under the balance cock. The pic attached is a Vostok which shows what I mean. If you are just experimenting you could try making a shim from aluminium foil and give that a try. Balance jewel caps are sometimes different sizes top and bottom, but it seems you have tried all combinations.

[andyr1968]

Hi, thank you for the replies. It was of course the shim under the balance bridge, I'd taken it off for the cleaning process and as I haven't yet refitted anything else, the shim is still in the storage pot with the rest of the parts! Beginner's mistake but I'm just releaved it was a simple error. It is only a practise movement, but I didn't want to have ruined it before I'd even started.