Crown on my rolex won't screw down

If it is a genuine rolex:

1. You twist the crown counter clockwise to unscrew it.
   
2. Gently pull the crown. You should hear it click into the last position. Turn the crown to change the time.
   
3. When you are finished, gently push the crown back in towards the watch case.
   
4. Screw the crown back down by turning it clockwise.
   

You probably have a screw down crown. Turn the crown counterclockwise and unscrew the crown. Now you should be able to pull it out. When tightening it back down, don't over tighten, just snug. This is to keep moisture out of your watch. Always have it screwed down unless you are setting the watch. Nice watch, Michael

The repair for this problem may be quick and inexpensive--or somewhat more expensive. Either way, it's considered a minor repair.
The crown and stem assembly in held in a Rolex movement by a small pressure screw. When this screw is loosened, the stem can be cleanly pulled out of the movement without damaging any parts. The movement can then be removed from its case. If the screw is too loose, it is sometimes possible to pull the crown and stem out with ordinary effort. The simple fix for this would be to have a watchmaker take the back off your Rolex (requires a special wrench) and slide the stem back into the watch while loosening and re-tightening the screw. If that's it, the repair takes about 5 minutes, most of which is spent removing and replacing the watch back.
Things can get more complicated. The set stem interacts with a thin sheet metal spring / detent that helps the stem "snap" to its various set and wind positions. Sometimes, when a stem gets pulled out, the force of that can snap the delicate little finger in this watch part. Replacing this watch part will require that the movement be removed from the case and the hands and dial be removed for access to the part. Once you get to it, the part itself can easily be replaced--it's designed to be replaced without disassembling the whole watch movement--but there's considerably more effort involved than just sliding the stem back in and tightening down the screw.

Unscrew the crown and then pull the crown out to the second click and turn. When done push the crown back in and screw the crown back down.

It is very important to screw the crown back down. If this is not done the watch is NOT water resistant.

Hope this helps.
Ken
Yellowstone Watch Inc.
www.yellowstonewatch.com

There isn;t any downloadable manuals for Rolex watches, but operation of Rolex Day-Date is very simple:
1) when you unscrew the crown, it is in winding position,
2) when you pull out the crown to the first click, it is in day and date setting position (depending wich way you turn the crown).
NOTE: to adjust the day or date, previously you have to advance hands forward, passing 12 o'clock (midnight) mark and stop advancing at 4.00 a.m. using the crown in position as described in chapter 3. When done - push the crown fully in, then pull out to the first click and only then adjust the day or date.
3) when you pull the crown further out to the second click, it is in time setting position.
To find the daytime or night time on the watch: pull out crown to the second click and advance watch hands forward till you pass the 12 mark on dial. If the date changes as you pass it - it is the night time (midnight). If the date do not change as you pass it - it is the daytime (noon).
After all settings being done, allways screw the crown back down as it protects the watch from water and moisture.
Never use watch in sauna- it's not designed for that.
Do not forget to rate, please.

There isn;t any downloadable manuals for Rolex watches, but operation of Rolex Day-Date is very simple:
1) when you unscrew the crown, it is in winding position,
2) when you pull out the crown to the first click, it is in day and date setting position (depending wich way you turn the crown).
NOTE: to adjust the day or date, previously you have to advance hands forward, passing 12 o'clock (midnight) mark and stop advancing at 4.00 a.m. using the crown in position as described in chapter 3. When done - push the crown fully in, then pull out to the first click and only then adjust the day or date.
3) when you pull the crown further out to the second click, it is in time setting position.
To find the daytime or night time on the watch: pull out crown to the second click and advance watch hands forward till you pass the 12 mark on dial. If the date changes as you pass it - it is the night time (midnight). If the date do not change as you pass it - it is the daytime (noon).
After all settings being done, always screw the crown back down as it protects the watch from water and moisture.
Never use watch in sauna- it's not designed for that.
Do not forget to rate, please.

There isn;t any downloadable manuals for Rolex watches, but operation of Rolex Day-Date is very simple:
1) when you unscrew the crown, it is in winding position,
2) when you pull out the crown to the first click, it is in day and date setting position (depending wich way you turn the crown).
NOTE: to adjust the day or date, previously you have to advance hands forward, passing 12 o'clock (midnight) mark and stop advancing at 4.00 a.m. using the crown in position as described in chapter 3. When done - push the crown fully in, then pull out to the first click and only then adjust the day or date.
3) when you pull the crown further out to the second click, it is in time setting position.
To find the daytime or night time on the watch: pull out crown to the second click and advance watch hands forward till you pass the 12 mark on dial. If the date changes as you pass it - it is the night time (midnight). If the date do not change as you pass it - it is the daytime (noon).
After all settings being done, allways screw the crown back down as it protects the watch from water and moisture.
Never use watch in sauna- it's not designed for that.
Do not forget to rate, please.

No, there isn;t any downloadable manuals for Rolex watches, but operation of Rolex Datejust is very simple:
1) when you unscrew the crown, it is in winding position,
2) when you pull out the crown to the first click, it is in date setting position,
3) when you pull the crown further out to the second click, it is in time setting position.
To find the daytime or night time on the watch: pull out crown to the second click and advance watch hands forward till you pass the 12 mark on dial. If the date changes as you pass it - it is the night time (midnight). If the date do not change as you pass it - it is the daytime (noon).
After all settings being done, allways screw the crown back down as it protects the watch from water and moisture.
Never use watch in sauna- it's not designed for that.
Do not forget to rate, please.

Unscrew the crown, pull out the crown fully to the second position. and rotate the crown counter clockwise or clockwise. Push the crown back in and screw down the crown.

Yes, you must unscrew the crown before you wind up or set the watch. Always screw the crown down afterwards this keeps the watch in a water resistant condition.