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Winding Stem Holding Screw Has A Stripped Thread

WillFly

By WillFly
in Watch Repairs Help & Advice

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WillFly Distinguished Member

WillFly

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I've acquired an old and very worn Tiresa head (Swiss, 17 jewels) to play around with - broken mainspring, etc. - and I'm having some trouble in undoing the screw that holds the winding stem. It turns freely - but doesn't actually unscrew - so the thread is probably mangled - and there isn't enough purchase for tweezers to grip it. Minor, but damned irritating! Unfortunately, it's not so loose that it will just drop out. Any ideas here?

 

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clockboy Distinguished Member

clockboy

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Will you will have to use rodico perhaps or a touch of super glue on the end of a pokie thing & hopefully it will lift it out. The only other thing I can think of is if there is no power in the watch is to remove the the bridge wheels etc and hopfully you can access the stem from this side & wiggle it out.

Edited by clockboy
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Geo Distinguished Member

Geo

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It could have a shoulder on it that holds it captive until you split the movement. I've come across that sort of thing before.

It's just a thought Will.

I've also seen them where you unscrew a couple of turns and then press the end of the screw to release the stem.

Edited by Geo
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clockboy Distinguished Member

clockboy

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Will had another thought!!!!

The screw has most likely detached itself from the retaining yoke that stps the stem coming out. What might work is to remove the movement retaining ring & have the watch dial up & wiggle it & at the same time pull the stem. Be careful as the stem can brake

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WillFly Distinguished Member

WillFly

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No, alas, I've had to put it on one side, just for the moment, as I've been chauffeuring various family members hither and thither and doing other domesticities. Grandkids school runs, mother-in-law (who's 88 and frail) to hospital for a test this afternoon, shopping tomorrow morning, hospital myself on Friday morning (suspect mole on back). All sorts of fun and games, and I like to book myself some tranquil play space!

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clockboy Distinguished Member

clockboy

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No, alas, I've had to put it on one side, just for the moment, as I've been chauffeuring various family members hither and thither and doing other domesticities. Grandkids school runs, mother-in-law (who's 88 and frail) to hospital for a test this afternoon, shopping tomorrow morning, hospital myself on Friday morning (suspect mole on back). All sorts of fun and games, and I like to book myself some tranquil play space!

Me & you seem to have the same hectic life Will. Me clearing a loft with 30years of crap in it. Grandson for the next two days etc etc. PS you might appreciate this in the loft found a box of my old LP,s + my faithful Thorens turntable, sadly with the counter balance weight is missing. All this and them watches still need looking at!!!

Edited by clockboy
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WillFly Distinguished Member

WillFly

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I'm hoping to get a "window of opportunity" to sit down with it this weekend. The grandkids and the local health centre have been taking up the week, and I've got to sort out 3,000 pieces of sheet music into a filing cabinet I collected from an eBay seller on Monday afternoon, and I can't get the cabinet into the garage until I've shifted amps and crates out of the way, and then I've got to get my son over to give me a hand with shifting the cabinet, and then... and then...

 

So I'm a bit busy at the moment! :D

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      Unfortunately I'm not that lucky. I started on the train side and after I noticed the binding I pulled everything out except the driving wheel to rule everything else out. It still binds. I'm going to double check that the pinion is fully seated on the staff first, then if no joy I'll push the bridge jewel up a fraction of a mm. Fingers crossed!
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      Happy to have helped, great way to start the day with a win! 🥳
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      By GuyMontag · Posted

      I have that French tech sheet too, it is a little different than the English one (eg, it doesn't have the auto works diagram). BTW, it looks like you are looking up the case number in the 1979 ABC supplement. The 1974 ABC catalog does have the 3093 case. As you determined it takes the 1222-5 crystal.  When I serviced my President 'A' (which also takes that crystal), I was able to fit a 29.8 crystal from my DPA crystal assortment. Those are, in my opinion, a great deal. The assortment comes with 10 sizes each from 27.8mm to 32.4mm in 0.2 increments. I pretty much use them for any non-armored crystal that takes a high dome crystal. I think they no longer make them but Cousins has still has some in stock but when I bought them they were around $40 for the set and now they are around $100. Still, at 40 cents a crystal it's still a good deal. For the large driving wheel, I remember I once assembled the keyless/motion works first and when I placed the large driving wheel it was interfering with the setting wheel on the dial side as the teeth were not fully meshing and it wouldn't fully seat. If that isn't the issue I got nothing and am looking forward to see how you solve it 🙂
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