We have the model right before that. Its a 276 series 2. I have never been able to make it burn more then 1.8 gallons of fuel an hour. Ours had a PTO and 3 point at both ends. Before I started work here, someone had run the engine end drop box out of grease, and the box totally split apart. Ours now has the whole PTO out, but that is mainly from abuse. I think if it hadn't have had 10 different guys running it, it would still be in good shape.
If you are going to buy one, make sure the hinge pins aren't worn out. That is the weak point on the whole tractor. There are alot of guys around here that "push" a swather head, and pull a hydroswing. You can cut a lot of hay in a hurry.