If you're talking about a finish mower, I run a 48" on the 15 hp version of that tractor with no issues at all, doesn't slow if the grass gets overgrown. I would think yours could run a 60" finish or 48" brush hog without a problem. There are a couple of YouTube videos of brush hogs on the Bolens diesels, but I don't recall details of which engine or size cutter, they look less than 5 foot to me.