Third Impact

Manual Labor Efforts

Reduction and limitation of manual labor, and rising labor force, with increased volumes of production on construction sites, ports, quarries, etc., in the 1960's required the creation of small energy-bulldozers. The first machines still used manual, but by the end of 1970 was widespread use of hydro-mechanical and, later, hydrostatic transmissions. Drive dozer blade also hydroficated. In addition to agricultural crawler tractors and mobile units began to use rubber crawler belt, and trim on the nose even further increased (bright example of this – a series of tractors Caterpillar Challenger). The final division of agricultural tractors was formed in early 1990, when the push bar with a rotary blade began to mount on the frame does not track the trolley and the frame tractor seat attachment for agricultural hitch effort to install three or pyatizubogo ripper, and the suspension became a semi-rigid suspension system with a transverse oscillating beam. Total worldwide industry Bulldozers easy class manufactured by Case, Caterpillar, Daewoo, Dressta, FIAT-KOBELCO (formerly FIAT-Hitachi and FIAT-ALLIS), hsw, Hyundai, Hitachi, hsw, John Deere, Komatsu, Shantui, xcmg and Walbon. A variety of model range is very large. There are modifications to the bucket with a scraper for cleaning the holds of ships to adhere to their walls and bottom of transported bulk goods. In mining there are modifications to poddirochno-loading bucket and an electric motor. To work on soils with low bearing capacity of producing modified lgp (y Komatsu – version of the index P), the track which increased and increased bearing surface track reduces ground pressure by 25