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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. 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.

4. Tractor - Wikipedia

   en.wikipedia.org/wiki/Tractor

   Therefore, operator's manuals for most of these tractors state one must always stop the tractor before shifting. Cutaway of a John Deere tractor. In newer designs, unsynchronized transmission designs were replaced with synchronization or with continuously variable transmissions (CVTs). Either a synchronized manual transmission with enough ...

5. Combine harvester - Wikipedia

   en.wikipedia.org/wiki/Combine_harvester

   Self-propelled combines started with standard manual transmissions that provided one speed based on input rpm. 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.

6. Threshing machine - Wikipedia

   en.wikipedia.org/wiki/Threshing_machine

   The name combine is derived from the fact that the two steps are combined in a single machine. Also, most modern combines are self-powered (usually by a diesel engine) and self-propelled, although tractor-powered, pull-type combines models were offered by John Deere and Case International into the 1990s.

7. List of tractor manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_tractor_manufacturers

   Mahindra Tractors (India) . Erkunt (Turkey)(part of Mahindra) . ArmaTrac; Mahindra; Mitsubishi Agricultural Machinery (Japan)(own 33.3%); Trakstar (formerly Mahindra Gujarat and Shaktimaan brands)