Open the jaws of the chuck all the way open. Inside the chuck you will see a slotted screw. Use a large flat head screw driver and remove screw. It will have left handed threads.
After you remove the screw put the end of the chuck in a vise where the 6 flats sides are. Put the drill in low gear and reverse. Hold tight and turn on the drill. This should run the chuck right off the spindle.
Answers & Comments
Open the jaws of the chuck all the way open. Inside the chuck you will see a slotted screw. Use a large flat head screw driver and remove screw. It will have left handed threads.
After you remove the screw put the end of the chuck in a vise where the 6 flats sides are. Put the drill in low gear and reverse. Hold tight and turn on the drill. This should run the chuck right off the spindle.
It works, but watch your wrists. A lot of torque to get it started.