How do i remove the chuck from the Makita 12v

There is a left handed screw down at the bottom of the chuck. I believe it is a flathead screw. You need to make sure you are in the lowest gear and turn that screw clockwise. It seems odd, but turning to the right will loosen the chuck screw. Once the chuck screw is removed then you need to remove the chuck from the spindle. Remove the chuck like a regular screw. It has regular threads and should be removed by turning it counterclockwise. Good luck