Minute wheel sheared teeth?

[Michaeluk]

Hello

I have been learning for around a year now, progressing but still an amateur.

The stem will not wind or change time, but was not loose.

Upon dismantling the stem area was disturbed but that may have been me.

I have ordered the part but my question is what would cause this, the damage appears confined to 5 teeth only.

The reason I ask is out of fear of putting all new parts and then the same happening again.

Thank you

 

 

 

 

[RichardHarris123]

23 minutes ago, Michaeluk said:

Hello

I have been learning for around a year now, progressing but still an amateur.

The stem will not wind or change time, but was not loose.

Upon dismantling the stem area was disturbed but that may have been me.

I have ordered the part but my question is what would cause this, the damage appears confined to 5 teeth only.

The reason I ask is out of fear of putting all new parts and then the same happening again.

Thank you

 

 

 

 

What movement is it?

[Michaeluk]

5 minutes ago, RichardHarris123 said:

What movement is it?

It's a Tissot 781-2

[Nucejoe]

 Go on to Dr ranffts database, to see the entire family of Tissot 781,

Enter the keywords ;          TISSOT 781 RANFFT

the minute wheel off of at least some of the manual winds should enterchange with the variant you have. Next go to Julesborel site to find the minute wheels they have listed to readily have available for sale.    Expensive 

 You should find out what caused the teeth to shear off,  if such fault remains it might damage the new wheel too.

Possible causes generally are; 

Loose or worn locating axle/ pin for the minute wheel or adjacent one.

Issues in between the minute wheel and canon pinion side. 

Good luck pal

 

Edited April 1, 2023 by Nucejoe

[watchweasol]

Hi find attached sheets for thr tissot 781-1       Hope they are useful for you.

2790_Tissot 781.1,782.1,783.1,784.1.pdf

[Michaeluk]

14 hours ago, watchweasol said:

Hi find attached sheets for thr tissot 781-1       Hope they are useful for you.

2790_Tissot 781.1,782.1,783.1,784.1.pdf 2.84 MB · 2 downloads

Very useful thank you.

19 hours ago, Nucejoe said:

 Go on to Dr ranffts database, to see the entire family of Tissot 781,

Enter the keywords ;          TISSOT 781 RANFFT

the minute wheel off of at least some of the manual winds should enterchange with the variant you have. Next go to Julesborel site to find the minute wheels they have listed to readily have available for sale.    Expensive 

 You should find out what caused the teeth to shear off,  if such fault remains it might damage the new wheel too.

Possible causes generally are; 

Loose or worn locating axle/ pin for the minute wheel or adjacent one.

Issues in between the minute wheel and canon pinion side. 

Good luck pal

 

Excellent thank you, I'll investigate those areas.

The expense is what's making me cautious here