How to remove shock settings from Smiths 512 movement

[RobS]

Firstly sorry for poor image quality I only have an iPhone for photos. 
 

Im working on a 512 movement and I’ve had some trouble with the “jewels”. I’ve got the metal one out, but when I tried to put it back the three sides of the spring seem to need pressing all at once to fit it as there are three “holes”. I get two corners in but as I go for the third the first two pop out! Constantly I’ve lost the spring. I’ve done the similar ones on seiko movements without trouble. Assuming I find it/a replacement, what am I missing!
 

on the other side with the only ruby in the movement is a setting with no “gap”at all. How do I get the spring out, and of course get it back in! 
 

What am I missing! 
 

thanks in advance. 
 

Rob

[mikepilk]

If you look at this thread, you can see I had exactly the same problems with balance springs with 2 prongs on a Smiths 627. The slots in the chaton were not big enough to get the ends of the spring out. I had to bend them to get them out and back in. Not ideal. I don't fancy having to do it again as they could easily break, and where would you find replacements?

I didn't come across the 3 prong type. 

 

 

[RobS]

Thanks, I think the answer to the triple prong problem is going to be peg wood with a hollowed out middle to press all three legs in and turn. Although I think me finding the spring is going to be a tall order, perhaps one from the bag of assorted springs I bought will fit. I’m guessing the springs are not magnetic too?
 

As to the double prong problem. I guess I will try with a bit more vigour. Thanks for the advice. 
 

Rob

[RobS]

As an update, it transpired the setting on the balance side, with the jewel had one flat end and one curved. When I rotated it enough it popped out. The chaton was entirely conical and a tricky customer but once lubricated and dropped back in I put the flat edge in first and poked it in with the peg wood tool mentioned above (I made it with flattening off the end then sizing with a pencil sharpener before poking a hole in the end) then rotated and it went in well. 
 

For the other side, magnet searching for the spring has been fruitless. 
 

thanks for the link to the other thread

[Mercurial]

The triple lobed spring, as you suggest needs to be rotated to remove it or replace it. Suitably shaped pegwood should suffice, but tools (shaped as you describe) for the purpose also exist. 

If you have an assorted of replacement springs, a trilobe style KIF spring of the right size might fit. 

The other spring securing the jewel also needs rotating. There is a slight opening in the setting at about the 5 o’clock position in your photo and one side of the spring should be able to be removed  there when rotated into position. 

Hope that helps,

Mark

[mikepilk]

1 hour ago, Mercurial said:

The other spring securing the jewel also needs rotating. There is a slight opening in the setting at about the 5 o’clock position in your photo and one side of the spring should be able to be removed  there when rotated into position. 

Yes, it "should", but there was no way to get the springs out of my cal 627 without bending them. The ends were too big for the slots in the chaton. Whether they left the factory like that, or someone fitted new springs .....