I have found on disk spools and axles DO NOT USE ANY spray or lube and they will come apart easier. The rust can come out if you do not spray it down with some oil based lube and make the rust into a paste. Take the axle nut off and then rattle the heck out of it with a BFH and they will come apart. The rust can fall out when it is dry. Spray it down and then you have to fight it apart.
On those bearings They are way cheaper from Shoup. Just call them the on line catalog is a Joke. Just have the JD part number and they can cross it right up for you.