willshak wrote:
Tony Hwang wrote the following:

The air flow sgould be upward. I think if you really want to remove
the blade just soak the seized part on the shaft with generous WD40 ,
let it work it's way a few hours, repeat in needed then bearing
puller....

Better than WD-40 is Liquid Wrench. Probably sold at the same place as
WD-40, or an auto parts store.
Let it sit for a while and try to remove it. If it still won't come
off, tap the end of the shaft with a hammer a few times.
If that fails, apply heat from a propane torch.

Better than WD-40 or Liquid Wrench is PB Blaster. Squirt some on it, repeat
whenever you remember, and come back the next day to remove it. You might
still have to tap it with something.

If that doesn't work, try the heat/cool approach with a torch, just don't
heat the shaft long enough to fry the bearings.

Jon