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2. List of John Deere tractors - Wikipedia

   en.wikipedia.org/wiki/List_of_John_Deere_tractors

   John Deere Model 60 (1955) John Deere Model 530 (1959) John Deere Model 430S (circa 1960) After years of testing, Deere & Company released its first proper diesel engined tractor in 1949, the Model R. The R was also the first John Deere tractor with a live independent power take-off (PTO) equipped with its own clutch. The R also incorporated ...

3. Tractor - Wikipedia

   en.wikipedia.org/wiki/Tractor

   John Deere tractor rollover diagram A classic Allis-Chalmers WD row crop tractor, absent any form of rollover protection. Agriculture in the United States is one of the most hazardous industries, only surpassed by mining and construction. No other farm machine is so identified with the hazards of production agriculture as the tractor. [42]

4. John Deere - Wikipedia

   en.wikipedia.org/wiki/John_Deere

   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.

5. Agricultural machinery - Wikipedia

   en.wikipedia.org/wiki/Agricultural_machinery

   A John Deere cotton harvester at work in a cotton field. Combine is a machine designed to efficiently harvest a variety of grain crops. The name derives from its combining four separate harvesting operations—reaping, threshing, gathering, and winnowing—into a single process.

6. Combine harvester - Wikipedia

   en.wikipedia.org/wiki/Combine_harvester

   Deficiencies were noted and in the early 1950s combines were equipped with what John Deere called the "Variable Speed Drive". This was simply a variable width sheave controlled by spring and hydraulic pressures. This sheave was attached to the input shaft of the transmission. A standard 4-speed manual transmission was still used in this drive ...

7. John Deere Model A - Wikipedia

   en.wikipedia.org/wiki/John_Deere_Model_A

   The A was produced in a wide variety of versions for special-purpose cultivation. It received a styling upgrade in 1939 and electric starting in 1947. With the advent of John Deere's numerical model numbering system, the A became the John Deere 60, and later the 620 and 630, 3010, 3020, 4030, 4040, 4050, 4055, and ended with the 7610. [1]