The JD 170 was manufactured by Owatonna MFG (Mustang) back in the early '70s. It was Owatonna's knockoff of the very popular Bobcat 610 skidloader. It has a mechanical drive system utilizing steel clutch plates ( troublesome) and a rubber drive belt. It was heavy, underpowered, and prone to mechanical breakdown. Unless you are very mechanically inclined, I would pass on this unit. A Bobcat 600 or 610 would be a much better machine of this vintage. Easy to work on, very reliable and great parts availability.
OrangeGuy