Ford Model 800 Tractor Specs

by Chelsea Oliver Updated July 05, 2023
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Henry Ford began experimenting with tractor design in the early 1900s, establishing Fordson. While Ford stopped tractor production in the United States in 1928, it was continued in England. The Ford 800 series of tractors consists of the 820, 850 and 860 models. The 820 was produced between 1955 and 1957, and the 850 and 860 were produced from 1954 to 1957.

Engine and Transmission

The Ford 800 series tractors have identical vertical inline Ford EAF gasoline engines with natural aspiration, four cylinders and eight valves. The bore and stroke is 3.9 by 3.6 inches and it has a 2.8 liter displacement with liquid cooling and a 14.2 coolant capacity. It has oil bath air cleaner, a compression ratio of 6.75 to 1 and 2,200 rated revolutions per minute (rpm). The oil capacity is 4.7 liters and it has six starter volts. All three models have unsynchronized gear transmissions with five forward and one reverse gear and a dry disc clutch.

Bore Definition

The bore is the inner diameter of a cylinder in an engine.

Dimensions and Tires

The Ford 820, 850 and 860 tractors weigh 3,400 pounds operating and 6,700 pounds ballasted. The 850 and 860 models share their other dimensions, measuring 121.8 inches in length, 64.75 inches in width and 59.3 inches in height. They have 75.18 inch wheelbases and 21 inch ground clearances. The front and rear treads measure 52 to 76 inches. The front tires for both models are six by 16 and the rear tires are 12 by 28. The 820 is smaller than the other models, with a 74.5 inch wheelbase, 113.6 inch length and 55.5 inch height. The ground clearance of this model is 19 inches, the front tread measures 52 to 80 inches and the back tread measures 48 to 76 inches. The front tires are six by 16 and the rear tires are 10 by 28.

Power, Mechanical and Electrical

The main differences in the Ford 800 tractor models is that the 820 has no three-point hitch or hydraulics, and the 850 has a transmission power take-off (PTO) while the 860 has a live PTO. Both the 850 and 860 have 540 rear rpm and a type 1 three-point hitch with 1,250 pounds of lift. Each model has three, 14-inch plows and a claimed belt power of 40 horsepower. The tested drawbar and belt power in the 850 is 35.16 and 39.55 horsepower, and in the 860 is 39 and 45.41 horsepower, respectively.

The chassis of each model is a 4-by-2, two-wheel drive with manual steering, differential mechanical expanding shoe brakes and an open operator cab station. Power assist steering for these models is optional. Also identical is the positive electrical grounds, 20-amp generator charging systems and single six-volt batteries.

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