Can't remove chuck from drill - Ryobi Compact 18 Volt Hammer Drill P214 2015 - iFixit

I have the ryobi p214 cordless drill and no matter what I cant remove the chuck. I took the screw out from inside the jaws and I put an allen wrench in and held it with the jaws. I managed to turn the chuck counter clockwise but it just barely spins without loosening at all. How can I get the - Ryobi Compact 18 Volt Hammer Drill P214 2015

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