I seem to have bad luck inserting stems into movements. I want to ask the knowledgeable folk here what exactly is the right way (predictable and repeatable) to insert the stem. I have an ETA2824 that keeps getting stuck in date set mode. I am able to partially open the movement and put the stem in, try a few times, then when I put everything together, the stem refuses to go in.
I also have a DG3804B. I attempted to change the DWO on this and was successful. I screwed on everything, put the dial and hands and put the movement in a case. Now the stem refuses to go in. I hate to keep having to open this movement from the top side because last time I did, the spring/filament that works with date set gear flew out. I managed to find it in the carpet, but don't think I will get lucky again.
So the key question is, how is this done reliably.
Do we put the movement in hand set position? OR it should be in winding position for me to pull out the stem?
I've heard different things from different people...some say put it in winding more, so there no way the spring can fall out of the pinion. Others say, put it in hand-set mode and gently insert.
Do we press the detent when inserting the stem back? OR do we just push the stem in and hope everything works?
How to ensure minute parts don't fly out? Or if they do, their flight is restricted?
(I am going to try and work on this DG3804 inside a ziplock baggie. This I feel will be difficult, but I seem to be able to work on small parts without needing magnification).