Sometimes they are rusted on and you may have to soak it in penetrating oil and use a 2 jaw puller to get it off. I hope not. Use a bit of antisieze on the shaft when you install the new one and it will never be an issue. Good Luck.Thanks for all th advise. The part I need to change out is the blade adapter - I didn't know the correct lingo. I also didn't realize it just pulled off after you remove the bolt for the blade. Easy fix - thanks.