use long levers ( shovel? ) and a piece of plywood and dish soap. keep em standing straight up and scootch them right up to the hub.. get 1 nut on and you are golden..
use a bottle jack onthe tractor so you can preciseliy line it up[.. but back it up with a jack stand within 1/2" of the bottle jack lift..
if anything shifts suddenly.. don't even think.. just jump back..