How to remove stem from ETA 955.112

[VWatchie]

My 80-year-old father asked me if I could repair his TISSOT watch which he got from my mother at his 40th birthday (as he remembers it). Now, he hasn’t been using it for some 20 or 30 years and he misses it. The problem being that the crown has come loose from the stem. The date can be set but the time can only be set in counter clockwise direction by moving the crown in clockwise direction. However, as soon as the crown is turned in counter clockwise direction it comes loose from the stem.

So, my plan is to remove the stem from the movement and glue its threads with Loctite 648. I want to remove the stem to get better control over it when gluing on the crown, and that is my problem and my question; how do I remove the stem?

The movement is a quartz movement, ETA calibre 955.112 and it is the very first quartz movement I’ve tried to repair. I thought it would be an easy task as I’ve been working on several mechanical and automatic ETA watches. I thought I would find a setting lever screw or a springed setting lever to remove the stem, but I can’t see any. Perhaps it is hiding underneath those blue plates? Anyway, I don’t want to take any unnecessary risks before having asked for your advice.
 

[watchweasol]

Hi   I think its the small black pin just south of the stem in your first picture press it down gently and pull the stem.

I Have enclosed the tech sheets for your interest.

612_ETA955.102,955.112,955.122,955.132,955.402,955.412,955.422,955.432.pdf

[vinn3]

26 minutes ago, watchweasol said:

Hi   I think its the small black pin just south of the stem in your first picture press it down gently and pull the stem.

I Have enclosed the tech sheets for your interest.

612_ETA955.102,955.112,955.122,955.132,955.402,955.412,955.422,955.432.pdf 3.01 MB · 1 download

very good refural,  thanks   vin

[VWatchie]

1 hour ago, watchweasol said:

Hi   I think its the small black pin just south of the stem in your first picture press it down gently and pull the stem.

I Have enclosed the tech sheets for your interest.

612_ETA955.102,955.112,955.122,955.132,955.402,955.412,955.422,955.432.pdf 3.01 MB · 2 downloads

Thanks @watchweasol but I can't see "the small black pin" in the first picture (which was only there to show the calibre). The only black pin I can detect in my pictures is in the second picture (south of the stem) but that must surely be one of the dial feet, no? I've been eying the PDF (thanks) but just can't figure it out 

Any other suggestions anyone?

[rogart63]

Press this button . If it's difficult to remove and there is rust . You can remove the circiut board . Then you can see the stem and maybe even remove the clips that holds the setting lever. 

Edited December 31, 2019 by rogart63

[watchweasol]

Hi Watchie   apologies a senior moment old age.  I think rogart is on the target its a while since I had one to do. at least I was the right side of the watch 

[VWatchie]

1 hour ago, rogart63 said:

Press this button . If it's difficult to remove and there is rust . You can remove the circiut board . Then you can see the stem and maybe even remove the clips that holds the setting lever. 

Thanks @rogart63! I suspected that "button-thingy" but as I was pressing it lightly with my tweezers it wouldn't budge one bit. I'll give it another try with some more pressure now that I know what it is and see what happens. If it doesn't move I'll remove the circuit board to get a better look. I don't expect it to be rusty as the movement looks to be great condition.

Happy New Year everyone!

[watchweasol]

Hi Watchie  I was watching one of Marks Videos dismantling an eta and rogart is right but it looked as Mark used quite a forecfull push to release the stem.

[Chopin]

I had to work on a similar movement once and I too had trouble removing the stem. I had to press hard on that little tab but also to use a bit of force and wiggle the crown until it eventually came out.

[VWatchie]

I just excused myself for a few minutes in the celebrations of the new decade and gave that button a bit more pressure and the stem came out as easy as pie. No resistance or problems whatsoever. Well, back to the new decade. See you on the other side!

As always, thank you guys and what would I do without you!?