This is a mid 1970s B5100E, a 10 hp 2 cylinder diesel, 2WD, with three speeds and two ranges. It has a class one but narrow three point hitch and rides on turf tires.
I bought it well used from a local dealer who said it spent most of the time on brush hog duty. I have it as a toy.
It handles a 5' rear grader blade with no trouble, though I am far from learning how to be proficient with it. I also pull a 4' drag harrow with it to help maintain a 250' driveway.
The little thing always starts easily and has never missed a beat. The power is there for what I do with it although there is some slippage when trying to knock down a pile of dirt with the grader blade but that is because of the tires and my lack of experience.
I think the little thing would easily handle the duties on a small truck farm with some ag tires.
You'll see in one photo how it sits in a 4X8 trailer.