G,Day gell.
If you are talking about the seal NEAREST the wheel yes you need a press and the planetary bearing will need to be preloaded ,before pulling the axle assembly out ,with the tractor sitting on level ground give the rear wheels a good rock like stand facing the wheel and put both hands on the top of the tyre and give the tractor a good rock ,you will most likely hear a CLUNK this is the tapered roller bearings loose inside so after stripping ,cleaning and fitting a new seal and possibly new bearings the assembly must be preloaded which require a certain ammount of knowledge and special tools I would suggest taking the complete axle assembly to your local Massey dealer.
thats all the help i can offer.
bemidji??sounds like victoria??.
happy Days .
HUtch.