If I recall correct, the nursary my dad works for has a 960 Skid steer. They love to opperate it, as it has the single joystick control.
Unfortunatly, them guys dont take care of their stuff, and have wiped out all of the right side wheel bearings. That is a two Peterson, two day MINIMUM job to replace the bearings for just one of the 4 axles, as the inner bearing on each axel MUST go in from inside the opperator cage- with the seat and other things taken off.
So if the 945 is used, Id really study it- drive it and look for wobble in the wheels, and have the dealer drive it around and you watch from outside if the wheels wobble indicating worn bearings.
If new or well taken care of, just make sure to check oil frequently, and chane reguraly.