Hart-Parr 40

The Hart-Parr 40 is a standard-tread tractor that stands out with its solid build and historical significance. The tractor is characterized by its simple, yet robust construction featuring a 4x2 chassis and manual steering type. It operates on a two-wheel drive system and is equipped with a 2-speed gear transmission, with forward speeds of 2.14 and 3.12 miles per hour. The steel wheels' size is considerable, with the front being 28 inches in diameter and 5 inches wide, and the considerable rear wheels at 52 inches in diameter and 13 inches width, indicating its suitability for a variety of agricultural tasks. Underneath the bonnet lies the distinct power source—the Hart-Parr 4-cylinder, liquid-cooled engine that runs on kerosene. It displaces 617.7 cubic inches with a bore and stroke of 5.53125 and 6.5 inches respectively, which operates at a rated RPM of 802, producing 40.66 HP at the crankshaft and 21.62 HP at the drawbar. This configuration points to an engine designed for torque and durability rather than high-speed performance. Dimensions of this model are especially noteworthy, with a length of 140 inches, a width of 96 inches, and a 67-inch height. The operating weight sits at 6300 pounds, which underscores the tractor's substantial build and work capability. While modern comforts and technologies are not part of this piece of farm equipment, it certainly served its purpose well during its production period, demonstrating impressive fuel efficiency and cooling capacity for its time.