Re: Rear wheel hub - ouch!
Tap, tap, tap, tap, back and forth till loosens. Not side to side, but on ends of the key. Sometimes if there is a little room at the head of the key to fit in a sharp tool, tap in there to get "under" the key a little. Just remember keys are cheap, but shafts and keyways are not. Be careful not to mash the keyway in the shaft.
Did this thing take a lightning strike on that hub??
Anti seize, any brand will do, and should be widely available at any auto parts store. Parts are machined to fit together and work without having to be seized up!
Looks like you are on the last lap headed for the back stretch, good luck rest of the way.
X 500 48" Deck 48" blade
Sears Suburban Super 12 1968
Craftsman 1990 something LG Tractor 46" deck