There are two ways depending on what you need to do, if it is just change the weight you can do that by rotating the silver washer around the bearing until the flats line up and the weight will come off,
The hardest part is getting the washer retaining ring back on with out a special tool but it can be done
You can remove the winding bridge and undo the 3 small screws that hold the bearing on if you need to change the bearing as well, be careful as this bridge also holds the hacking lever in place and it is easy to forget to re fit it