How to get the chuck off my drill

[IFMJohn]

Welp, I purchased an air drill from the cornwell truck the other day. He threw in a jacobs quick change chuck with it. So I went to change it, I pulled the small allen head screw out and went to pull off the chuck but it didnt budge. My coworker (mechanics) told me to put a prybar behind the chuck and pry it off. I tried, the chuck didnt come off but I did manage to make the chuck not move anymore (it wont tighten or loosen). Now i've got a broken drill. Any idea how to get the chuck off without damaging the drill?

 

[ckblum]

Throw the short end of an Allen key in there, tighten it up (if it's not completely screwed up), give the Allen key a smack to loosen the chuck off the threads.

That's how we all did it on our Sioux, Pan-Am, CP drills.

 

[stikman56]

The check should be threaded on. Was the screw down inside it left handed threads?

 

[Ruger_556]

Those chucks thread on, grab the chuck with something and reverse the drill after taking the screw out.

 

[IFMJohn]

Please disregard this stupid thread. I figured it out about 2 minutes after I posted.