Wheel Horse D250
Here is a webpage devoted to this beast of a compact tractor.
I hope it helps you use, maintain, and repair it.
My 1981 D250 has an Wheel Horse ARK 550 loader with a Cessna Front PTO driven hydraulic pump. The loader is primarily why I bought it - I need to/enjoy digging in the dirt around the home. In addition to the loader, I have a dozer blade, York rake and a plug aerator. I have a dozen or so other WH tractors.
Suburban, Lawn Ranger, 551, 552, 701,1055s,1076,C100 etc.
This real nice restored D250 is owned by Charlie Pitcher. He brought it to this year's show, it was one of the fastest tractors there. You can reach him via the new forum.