I would hope you have a detail of the spindle.
But just in case here is one
So once the nut # 2 is removed the spindle knocks out of the housing down towards the blade.
No need to remove the housing unless you are thinking about using a press .
If you have an impact then just hold the blade , tightly so a glove would not hurt
If you don't have an impact then it becomes a bit more difficult but the trick is to block the blades from turning
Do not hold the blade bolt because it will turn
Use a hollow point drift on the spindle to avoid damage to the grease nipple .
The bottom bearing usually comes out with the spindle & the top one gets knocked out.
Note the circlip
Bearings are 6205's
I use a Z on the top and 2 RS on the bottom
You will stuff the grease seals which is why I use the shielded & sealed bearings but the grease seal must go back in to make up space.
It is a weird set up as there is nothing stopping the spindle rising up in the housing other than the fit between the lower bearing & the housing
For my professional customers I make up a spacer to go between the outer race of the lower bearing and the circlip.
The shielded bearings ( ZZ ) are not sealed so allow air & grease to exit the housing when you grease them.
I like to have them on the top because that is where the air space will be and also where water will get in unless you are silly enough to use the deck wash .
If you remove one of the rubber seals then the outer will pop when you grease the spindle sp leave both of them there but the inner shield can be removed which I normally do.
Full time users get about a full season out of the bearings .
I can not fathom out why Toro used such a light duty bearing in a very strong housing .
Allow an hour for each one till you get the hang of it.
I have not found any difference in the service life of the bearings between using sealed & unsealed bearings and the grease seal is dearer than the bearings .