A solution when the crown of UPO does not screw

[Francisco]

One of the problems of some reps is the tube where the crown is screwed, because the steel used is soft and the tube-screw is damaged after some use. The result is that you cannot screw the crown any more.

For Oris Carlos Coste rep we found a solution, in this tuto:

Now we solve the same problem for the UPO. The owners of this rep are complaining about the same issue

[gran]

me like this

[plaifender]

just when you think it couldn't get any better.... francisco goes and does it again! now if only we had lathes laying around our houses.. this mod would be a sinch!

[vafarmer70]

Thanks for the tips you continually teach me things

[DemonSlayer]

Thanks for the tutorial Francisco. I was really hoping that the new tube would be a straight swap, how unfortunate. Importantly however it does allow for a second option instead of being stuck with 'gen tube + crown'.

[dluddy]

Fantastic tutorial Francisco - thanks for continuing to share

[HauteHippie]

Good stuff, as usual, F. The lathe sure is an indispensable tool!

[kbh]

I don't see any reason this couldn't be done with either a Dremel or small drill press and a file. Spin it and file it down to size.

Somebody try it and report back.

[maxman]

Thank you so much Francisco, this Is going to help a lot of people

[FxrAndy]

Thanks Francisco, how much had to be removed from the out side and the end of the tube?

[Francisco]

Thanks Francisco, how much had to be removed from the out side and the end of the tube?

the end of the tube is just a bit... in this way the crown touches the case when the it is screwed.

about the outside diameter...it is not a bit. I did not take measurements... you finish when you can screw the crown.

regards,

Francisco

[FxrAndy]

Thanks Fancisco, Now i have a lathe i will be able to do this if i ever have the need

[Francisco]

just a note to confirm that the same procedure can be applied to the chrono UPO, the new rep with modified movement to have subdials in correct position.

I have just repaired one of these reps.

regards,

Francisco