Hey zillah,
Not familiar with this one..but it looks like the fan has a screw that attaches it to the shaft..it also looks like it is pressed on..once you remove the screw you can try getting behind the fan with two same size screwdrivers and prying it off..
Makita 4014NV Parts List and Diagram : eReplacementparts.com
hope this helps?
cmoorejack