If the hubs haven't been attended to in awhile, the cone washers might be rusted - they're sometimes tough to get off. A couple of days before I planned to repack the bearings, I took the hub covers off and sprayed the cone washers with a good penetrating oil. I found that the longer the time the oil can work the better. If you have to beat on the studs to get the cone washers off, make sure you keep the nuts on otherwise the cone washers can go flying. Use anti-seize on the cone washers when you re-assemble.

Just follow the procedure in the FSM. You should replace the hub gaskets and the slotted ring. You'll need a 54mm socket.