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Re: Removing the crown/stem of CASIO EF-321
There is a tiny point (end of small metal piece called setting lever)
on the left side of the stem (on watch movement, very close where the
stem is entering the movement). You have to push that point down
with a metal pin or tweezers. Crown (winder) must be pushed in to
normal position otherwise you will not be able to put the stem back
properly. So, do as follows: 1) Push the crown in, 2) Lay the watch down on flat surface and push on setting lever point, 3) While holding setting lever pushed in- extract the stem by gently pulling crown out of watch. If this doesn't work- upload picture here.
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First of all avoid setting the day and day of the week between 9.00 pm and 6.00 am. The day and day of the week may not change in the following day if you do.
1) Pull the crown to the first click.
2) Set the day by rotating the crown counterclockwise.
3) Set the day of the week by rotating the crown clockwise.
4) Push the crown back to its normal position.
Unscrew the crown by turning it counter clockwise until the crown is free from the stem. Then turn it clockwise six times. After this step push the crown in and continue turning it clockwise until it is once again screwed back on to them stem. DO NOT SKIP THE LAST STEP because although the watch will operate in the winding position it no longer water proof. A simple drop of water in the stem would mean death for your watch. If you wear the watch everyday I suggest you wind it once or twice a month.
The winding crown is loose on the stem. Get the stem completely out of watch and while holding in vice or pair of pliers screw the crown back on tight. Do not overscrew it, as the stem may brake. Even better would be to unscrew the crown first, dip the threaded stem end in to the Superglue and then screw the crown back. It will prevent from the same problem in future.
On some watches - scuba usually - the crown has a rubber seal and that seal is engaged when the crown is screwed to the case. If your watch is like this, you need to unscrew the crown before you can pull out the stem.
Twist the crown in a counterclockwise direction several turns. You will be able to tell when it is completely unscrewed because youwill feel spring tension. Pull out the stem to set the watch. When you finish, push the stem back in.
Push against the spring tension and carefully thread the crown back onto the case.
That should do it.
There is a tiny point (end of small metal piece called setting lever) on the left side of the stem (on watch movement, very close where the stem is entering the movement). You have to push that point down with a metal pin or tweezers. Crown (winder) must be pushed in to normal position otherwise you will not be able to put the stem back properly. So, do as follows: 1) Push the crown in, 2) Lay the watch down on flat surface and push on setting lever point, 3) While holding setting lever pushed in- extract the setting lever by gently pulling crown out of watch.
The crown is probably a screw down style. The screw down stem is designed to keep the water out and should be screwed shut when not adjusting the watch. Look at the watch stem from the side, look from the 3 oclock to the 9 oclock, you should see the end of the stem. Now turn the stem counterclockwise. After a number of turns, the stem should pop out a bit, it is now ready to set. Most waterproof automatic day/date watches have 4 positions for the stem:
1: screwed down (locked)
2: unscrewed position A
3: unscrewed position B (stem pulled out to first "click")
4: unscrewed position C (stem pulled out all the way.)
This is usually used to wind the watch, although some automatic watches cannot be wound by the stem.
Used to set day/date. Turning the stem one direction will advance the day and turning it the other direction will advance the date.
Used to set the time. Some watches will "hack," a term used to describe the ability to stop the second hand for accuracy purposes.
Be sure the watch is at least a little bit wound before starting theis procedure or it will not run when you get it set!
Unscrew the stem and pull it all the way out to position C. Now turn the stem to advance the time clockwise. Continue turning until the day/date advances, now you know you are in the AM 12 hrs of the day. It is important not to advance the day/date with the stem during the 3 hours before and the 3 hours after midnight, so go ahead and move the time to 8 am.
Now push the stem in sligthly until you are in position B. Sometimes it is easier to go to position A, the out to position B. Once in position B, advance the day/date until it is set for the current day/date.
Pull the stem out to position C. Adjust the time to one minute past the current time. Watch your reference timepiece until it matches your watch and push the stem in when they match.
Your watch is now set! Screw the crown down and wear it in good health.
Hacking. If you stop the second hand at 0 seconds, and wait for your reference timepiece to reach 0 seconds also, you can set the watch to within a second accuracy.
Movement slop. If you advance the time past the time you wish to set your watch and then "backup" to your chosen time, you will remove the slop from the geartrain and make your watch set more accuretly