Stem Problems With Sellita Sw 200

[mwilkes]

I have a couple of Sellita SW200 movements, which are equivalients of ETA 2824-2, and they're driving me crazy.

 

The stem is held in with detent that you push with a pointy stick. However, i find that every second time i try to replace the stem, something goes out of kilter and I end up having to disassemble the keyless work. I think the yoke is too easily lifted out of the sliding pinion.

 

Am I doing something wrong? Does the keyless work need to be set to a certain position before removing/replacing the stem? Or am i just pressing too hard on the release stud thingy?

 

Thanks

 

~Mark

[rogart63]

Are you using the right stem? Either that or you are pressing to hard? How does the setting lever spring looks? . 

Edited November 9, 2015 by rogart63

[mwilkes]

spring looks ok, and the stem came with the movement - i'm actually wondering now if it's the alignment of the case - I might be forcing the stem in slightly diagonally. Have to look tonight.

[SSTEEL]

Don't use a pointy thing, use a 1.20mm flat watchmakers screwdriver, this ensures you don't push the button too far down, and screw things up.

 

Do you know the history of the watch?  I have experienced similar on some movements, and turned out that a previous owner, or watch repair guy replaced the Swiss parts for Asian and they didn't mate right, thus coming out of position.

 

How old is the movement?  Again, I have had similar issues you are experiencing, where in some cases, the harbour that the sliding pinion rests with the stop lever (Hack lever) this harbour was worn due to incorrect/over lubrication, and the whole area was scorned/scratched/worn.

Edited November 9, 2015 by SSTEEL

[mwilkes]

Thanks SSteel - it's actually a new movement. Bought a couple of 'em on the bay to play with. I'll try the not-using-pointing-things technique and see if it helps. 

[perpetual92]

Same thing was happening to me on some cheap Chinese movements. I just bought new eta keyless works parts and a few other high wear partS to solve the problem plus really to keep on hand to service my ETA genuine watches in the future...

[steven]

You need to pull the stem to time setting position before pressing on the detent stud with a screwdriver to remove the stem. The keyless work still in the time setting position when replacing the stem, the stem should goes in smoothly while pressing on the detent stud.

Sent from my iPad using Tapatalk