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  2. Caterpillar D9 - Wikipedia

    en.wikipedia.org/wiki/Caterpillar_D9

    The unit featured the same new type of elevated drive sprocket undercarriage as had been introduced on the larger D10 in 1977. [i] The new undercarriage design reduced strain and shock loads on the final drives [2] and gave the "belly pan" more ground clearance. The elevated-drive-sprocket undercarriage is a modular design.

  3. Caterpillar D7 - Wikipedia

    en.wikipedia.org/wiki/Caterpillar_D7

    In 1986 the 215 hp (160 kW) D7H was the first D7 equipped with Caterpillar’s elevated drive sprocket undercarriage. The D7R replaced the D7H in 1996, followed by the D7R Series 2. The electric drive D7E entered service in early 2009, returning to a traditional ‘flat-track’ configuration for this iteration only.

  4. Caterpillar D8 - Wikipedia

    en.wikipedia.org/wiki/Caterpillar_D8

    1982: 335 hp (250 kW) D8L replaced D8K. The D8L was the first D8 with the elevated drive sprocket undercarriage. 1984: D8L SA (special application) for farming applications premiers. Available with a three point hitch, for mounted implements.

  5. 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 ...

  6. Crawler excavator - Wikipedia

    en.wikipedia.org/wiki/Crawler_excavator

    John Deere 135P excavator with rubber tracked treads. A crawler excavator, also known as a track-type excavator or tracked excavator, is a type of heavy construction equipment primarily used for excavation and earthmoving tasks. It is characterized by its tracked undercarriage, which provides superior mobility and traction compared to wheeled ...

  7. Excavator - Wikipedia

    en.wikipedia.org/wiki/Excavator

    Most wheeled, compact and some medium-sized (11 to 18-tonne) excavators have a backfill (or dozer) blade. This is a horizontal bulldozer-like blade attached to the undercarriage and is used for leveling and pushing removed material back into a hole.

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