Thanks for the comments. Surprisingly it can push a good amount for a 23 horse diesel tractor. I'll have to get a pic of it pushing as much as it can handle and post it up here. The only time that I have trouble is when I'm trying to lift snow that is so wet and heavy that its pretty much slush. We're thinking about selling it and upgrading to a Kubota L5740 with an 8ft pusher.
I'm having a lot of trouble with the tractor right now though. It will start and then die, and not start up again. It has done this atleast once every storm. So I assumed that it was gelling diesel, but I always put in power service anti gelling fluid. So today when it happened I went to the water separator and pulled that off and there was a lot of water in there so I cleaned it all out and changed the filter and this helped nothing. How I got it started last time this happened was I got a hair dryer and heated all the fuel lines and injectors and fuel filters. After about an hour or two of this I got it started. It was around 32 though so I doubt that the diesel with fuel additive would gel at that temp.