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  2. Three-point hitch - Wikipedia

    en.wikipedia.org/wiki/Three-point_hitch

    Three-point linkage on a Ferguson 35 tractor. The tractor and linkage are painted gold. The grey bars are a separate implement (a towing ball hitch) attached to the linkage. The three-point hitch is made up of several components working together. These include the tractor's hydraulic system, attaching points, the lifting arms, and stabilizers.

  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. John Deere Powershift transmission - Wikipedia

    en.wikipedia.org/wiki/John_Deere_Powershift...

    The John Deere PowerShift transmission was an eight-speed semi-automatic transmission without a torque converter, used in John Deere tractors, including the iconic John Deere Model 4020. [1] The Powershift is not to be confused with similar John Deere transmissions (including the Quad-Range and the PowrQuad [ 2 ] ), or with the Ford Ultra ...

  5. Overconstrained mechanism - Wikipedia

    en.wikipedia.org/wiki/Overconstrained_mechanism

    The reason of over-constraint is the unique geometry of linkages in these mechanisms, which the mobility formula does not take into account. This unique geometry gives rise to "redundant constraints", i.e. when multiple joints are constraining the same degrees of freedom. These redundant constraints are the reason of the over-constraint.

  6. 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 ...

  7. Six-bar linkage - Wikipedia

    en.wikipedia.org/wiki/Six-bar_linkage

    Six-bar linkage from Kinematics of Machinery, 1876. In mechanics, a six-bar linkage is a mechanism with one degree of freedom that is constructed from six links and seven joints. [1] An example is the Klann linkage used to drive the legs of a walking machine. In general, each joint of a linkage connects two links, and a binary link supports two ...

  8. Four-bar linkage - Wikipedia

    en.wikipedia.org/wiki/Four-bar_linkage

    If the linkage has four hinged joints with axes angled to intersect in a single point, then the links move on concentric spheres and the assembly is called a spherical four-bar linkage. The input-output equations of a spherical four-bar linkage can be applied to spatial four-bar linkages when the variables are replaced by dual numbers. [8]

  9. John Deere Model L - Wikipedia

    en.wikipedia.org/wiki/John_Deere_Model_L

    The L was first produced in 1937. Unlike most John Deere tractors, it was designed in John Deere's Dubuque Wagon Works plant in Dubuque, Iowa, and did not resemble previous Deere products. It departed further from tradition by using a non-Deere engine, a Hercules two-cylinder engine mounted in line, rather than transversely, as had been ...