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The Komatsu D575A Superdozer is the largest bulldozer currently in production.

A Komatsu D575 with a man leaning against the tracks

It is built by Komatsu Ltd. of Tokyo, Japan at their Osaka plant. The D-575A is used primarily as a coal mining dozer in strip mining pits in North America & Australasia. Its size and power allow it to move more coal than other mining dozers and even the drag lines commonly used in strip mines.


The power required to move the 152.6 tonne (336,420 lb) machine comes from the Komatsu SA12V170E diesel engine producing 858 kW (1,150 hp). It has a ground contact area of 9.4342 m² (101.55 ft²) and exerts an average pressure of 159 kPa (23 lbf/in²) on the ground it sits on.

The dozer features a 69 cubic metre (90 yd³) blade capacity with a blade height of 3.64 m (11 ft 11 in) and width of 7.4 m (24 ft 3 in). The dozer itself is a total of 4.88 m (16 ft) tall and 11.72 m (38 ft 5 in) in length with a ground clearance of 745 mm (2 ft 5 in).[1]


These dozers operate primarily in strip mines in West Virginia, mostly operating on Massey Energy sites in Appalachia and to date, 17 D575A's in service in the West Virginia Coal Fields. There is one super ripper that operates in Las Vegas, and another in the South Island of New Zealand operating on the Stockton mine.

See also


  1. Earthmovers Magazine, October 2008, page 17 article by Keith Haddock

External links

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