That's actually very good to know. We aren't really in a tillage area; bought it to pull a baler. Thought about getting one of the european style mowers where you can mount it on the front and rear, but it doesn't have a front PTO, and the dealer said it's cost prohibitive to put it on aftermarket, so baling it is. I wasn't certain it was a Magnum engine; the mechanic at the dealer said it looked a lot like it, so that's what I based it off of.
On a different not, a mechanic friend that works for CAT told me that with a slight upgrade of the injectors and tweaking the pump, it could put out almost 100 hp more than it does currently, with about the same fuel consumption. Not sure if I'll go that route - seems to have plenty of power for what I'll use it for anyway.
Thank you again for the info! That's good to know. It is a little light for what it is - right around 15k lbs. Compared to other tractors of the same hp, they appear to weigh a lot more. I guess that's how they get the higher road speed. The new models, I read, have gone to a 6.4 ltr Cummins, and the big one's have 8+ ltr cummins.