"HDH" wrote in message
t...
Hi All,
I have a Craftsman Industrial 3/8" electric drill (variable speed,
reversible) with keyless chuck (model 315.271490 if you must know). I am
unable to remove the chuck according the instructions, which have me
locking
in an allen wrench and hitting it clockwise with a mallet, then removing
the
chuck screw by turning it clockwise, and so on.

1. I must be missing something obvious because hitting the allen wrench
does
nothing except rotate the chuck. The chuck is basically free to turn so
how
exactly am I supposed to be loosening anything with this task?

The shock of hitting it "should" loosen the chuck from the shaft. I've done
it on another brand of drill and it works. Given that it has not worked yet
for you, try a larger wrench to get more leverage when you whack it.
Perhaps you'd get better results if you heated the chuck first with a hair
dryer. Make sure it is clockwise. I forget what direction it said. Give
it a good smack!
Ed