I've bought a new 3/8 keyless chuck for my B&D drill and even before I
can find out that the new one is the wrong type and doesn't fit I'm stuck,
since I can't get the old one off the drill (old one doesn't tighten
very well and works loose).

I've removed the screw from the chuck, where one inserts the drill bit,
but the chuck is still very tight etc.

I've looked in my DIY books and skill books but no help ..

Thank you,
Neil