gplracer Posted October 15, 2008 Report Share Posted October 15, 2008 I am changing the case on my eta powered bkmariner. I know the crown/stem has to come out. Also there are some retaining screws. Does the rotor have to be removed or just the screws? Suggestions or tips? Thanks very much for your time. Link to comment Share on other sites More sharing options...
freddy333 Posted October 15, 2008 Report Share Posted October 15, 2008 The rotor is part of the movement, not the case. So just release the stem, unscrew & remove the 2 movement locking tabs & exchange movements. Then, reverse previous steps. Link to comment Share on other sites More sharing options...
im2 Posted October 15, 2008 Report Share Posted October 15, 2008 The rotor is part of the movement, not the case. So just release the stem, unscrew & remove the 2 movement locking tabs & exchange movements. Then, reverse previous steps. is there any tutorila/pictorials on how to do that? Well it sounds easy..but... you know.. Link to comment Share on other sites More sharing options...
alligoat Posted October 15, 2008 Report Share Posted October 15, 2008 Well, I'm sure there is a tutorial on this, but the search button isn't my friend! It's probably buried deep in the archives and by now the pics might even be gone! You need a 1.2mm screwdriver, first and foremost. Open the case, pull out the crown- people never seem to agree as to which position to pull it out to- maybe all the way out to the time setting position. Then you stick the screwdriver in the small slot next to where the crown/stem enters the movement- it's a slot with a circle in the middle- and gently pull the crown out. Next, you remove the two screws and hold down clamps- keep them away from the hairspring. Then you cover the movement w/ some watch paper, flip the case over, and the movement should come out. Sometimes the movement ring will keep it in, you might have to gently coax it. The biggest downfall is using the wrong size screwdriver and messing up the keyless works while trying to remove the crown/stem. I watch my watchmaker do it with a pair of tweezers, but obviously he does it everyday. The rest of us need to use a 1.2mm screwdriver, period! Link to comment Share on other sites More sharing options...
gplracer Posted October 15, 2008 Author Report Share Posted October 15, 2008 Thanks Alligoat. I had trouble finding a post about this as well. Link to comment Share on other sites More sharing options...
Justasgood Posted October 15, 2008 Report Share Posted October 15, 2008 Thanks Alligoat. I had trouble finding a post about this as well. For an ETA the crown must be in the Time setting (all the way out) position when you remove the stem/crown. A Steady hand and patience is all that is needed. Link to comment Share on other sites More sharing options...
freddy333 Posted October 15, 2008 Report Share Posted October 15, 2008 I know that Ziggy & others recommend pulling the stem out on ETAs, but I find it is better to leave it in the winding position (unscrewed, but all the way in). Otherwise, you risk having the clutch lever pop out of the channel in the clutch wheel (that holds the clutch wheel in position against the winding pinion) when you reinsert the stem. If/when this occurs, the clutch wheel slides too far to the left (away from the winding pinion) & you lose stem function. The only fix is to disassemble the keyless works & reset the clutch components (you need to remove the hands & dial to get to the keyless works). There are a few tutorials that describe how to remove an ETA stem, but you will need to Search them out. Check the Watch Repair section also. Link to comment Share on other sites More sharing options...
stilty Posted October 15, 2008 Report Share Posted October 15, 2008 I always remove the stem in pos. 1 as well (winding) I've never had a problem. I guess it is personal preference. Link to comment Share on other sites More sharing options...
gplracer Posted October 15, 2008 Author Report Share Posted October 15, 2008 This is going to make me nervous. Link to comment Share on other sites More sharing options...
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