I have a dewalt cordless 18v. drill and the keyless chuck no longer works. How do I go about replacing it myself?

 

Start by identifying your model number and type at: http://www.toolpartsdirect.com/cgi-b...d.cgi/7/dewalt

Then see if they have an exploded parts breakdown for your drill... it will illustrate how everything comes apart. And possibly you can even order the replacement parts from them.

Usually there is a machine screw right down the throat of your keyless chuck.