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Deere & Company, doing business as John Deere (/ ˈ dʒ ɒ n ˈ d ɪər /), is an American corporation that manufactures agricultural machinery, heavy equipment, forestry machinery, diesel engines, drivetrains (axles, transmissions, gearboxes) used in heavy equipment and lawn care equipment.
Many John Deere and other tractors and stationary power units produced from the late 1920s to the early 1940s had compression relief petcocks on the engine block, one per cylinder. These were opened during starting to de-pressurize the cylinders when spinning the flywheel by hand.
The John Deere 4020 was an agricultural tractor model made by John Deere from 1964 to 1972. It replaced the nearly identical 4010 that had been introduced with Deere's New Generation series in 1960 and offered a number of improvements over the previous model including more horsepower, heavier rear axles, and a differential lock .
The 3020 is nearly identical to the John Deere 3010 model that it replaced. It has a wheelbase of 90 inches, and a fuel capacity of 29 gallons. It was offered with three different engine options including a 3.7L 4-cyl gasoline engine, a 4.4L 4-cyl diesel and a 3.7L 4-cyl LP gas engine all produced by John Deere. The 3020 was rated at 71 horsepower.
Three new 4WDs came to market in the fall of 1981; these were the 225 hp (168 kW) 8450, 290 hp (220 kW) 8650, and big 370 hp (280 kW) 8850; the 8850 came with the company's biggest engine, the 955 cu in (15.6 L) V8 engine; Besides the 8850, the John Deere 844 wheel loader and 990 hydraulic excavator were the only other John Deere products to ...
The 60's replacement was the John Deere 620, in 1956. Engine power was increased again by reducing engine stroke by 0.375 inches, increasing the rpm. [9] The Orchard 620 or O-620 used the new 620 engine and remained in production after the 630 was introduced. It was the only "20" series tractor in production after 1958. [2] [10]
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The John Deere Model R tractor was John Deere's first diesel tractor. A large, heavy tractor, it had fixed wheel widths and was not produced as a row-crop tractor with adjustable axles. The R was followed in the John Deere numbered model series by the John Deere 80, 820 and 830 tractors, which represented evolutionary upgrades to the basic R.
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