How to a fit a barrel arbor back into the barrel on a Favre-Leuba 253?

[m0g]

Hello,

I'm currently trying to service a Favre Leuba 253 and the barrel is giving me some headache. Somehow the arbor and gear are one piece. How on earth am I supposed to fit the barrel arbor back in?

I already tried to brute force the arbor back in, resulting in both the destruction of the arbor and the mainspring. So I can already rule out that technique.

(Lovely movement though)

Thank you

[AndyGSi]

Have you tried inserting the arbor and then manipulate the spring through the gap so the collar will slide in.

[nickelsilver]

I get it in place, then rotate backwards while gently pressing down.

[m0g]

4 minutes ago, AndyGSi said:

Have you tried inserting the arbor and then manipulate the spring through the gap so the collar will slide in.

I haven't tried yet, but will definitely give a go. Thanks

[Neverenoughwatches]

27 minutes ago, m0g said:

I already tried to brute force the arbor back in, resulting in both the destruction of the arbor and the mainspring. So I can already rule out that technique.

I'm somewhat curious as to why you thought that technique might work

As with most arbors...reverse it in so it enters the wider spacing of the inner coil. A slight tilt will help it start. Brute force...lol...its not powerlifting...even that is mostly technique. If you made a shallow grunting noise....that was the moment to stop right there