I have a DeWalt DC988 Type 1 XRP 1/2" cordless drill/driver/hammerdrill with a keyless chuck that is locked up and stripped out. I pulled the center screw out of the chuck, but the chuck assembly won't come off. Don't know if I'm missing something or if I need to pry harder.
Put a large allen wrench inside the chuck and wedge in so it is stuck. Then take a hammer and hit the handle part of the wrench. Also spray WD40 down inside to loosen up the threads.
Don- toolsandmachinery.com, November 2008
after taking out the screw the chuck must be removed by unscrewing it from the shaft, clockwise I think (L/H thread).
