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Caterpillar D7

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In March 2008, at Conexpo 2008 held every 3 years in Las Vegas, Caterpillar introduced the D7E. This 235 hp D7E comes with an electric drive system powered by a 537cid C9.3 diesel engine. The C9.3 powers a generator that turns out electricity that will supply power to a pair of AC drive motors. Compared to the Caterpillar D7R Series II, the D7E is projected to deliver 25 percent more material moved per gallon of fuel, 10 percent greater productivity and 10 percent lower lifetime operating costs. An agricultural version without the blade and rippers is commonly used by farmers.

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Caterpillar D7

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bulldozer

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Two armored D7 bulldozers out on a mission in Ramadi, Iraq.

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1938

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Caterpillar

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tracks

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In March 2008, at Conexpo 2008 held every 3 years in Las Vegas, Caterpillar introduced the D7E. This 235 hp D7E comes with an electric drive system powered by a 537cid C9.3 diesel engine. The C9.3 powers a generator that turns out electricity that will supply power to a pair of AC drive motors. Compared to the Caterpillar D7R Series II, the D7E is projected to deliver 25 percent more material moved per gallon of fuel, 10 percent greater productivity and 10 percent lower lifetime operating costs. The D7R Series II at 240 hp power and an operating weight of 25 tons, is in the middle of Caterpillar's track-type tractors, which range in size from the D3 57 kW (77 hp), 7 t (8 short tons), to the D11 698 kW (935 hp), 112 t (124 short tons). It is primarily used to move material short distances or through challenging terrain. The vehicle is powerful, yet small and light 16 to 20 t (18 to 23 short tons) depending on configuration). This makes it ideal for working on very steep slopes, in forests, and for backfilling pipelines safely without risking damage to the pipe. An agricultural version without the blade and rippers is commonly used by farmers. The US Army used armored D7G to clear mine fields and unarmored D7G and D7H for earthworks. The armor was developed by the Israel Military Industries (IMI). Later, the US Army developed a remote controlled version of the D7G for mine-clearing applications. The United States Marine Corps has replaced its fleet of D7Gs with John Deere's 850J MCT in 2009 The Egyptian Army operates an unknown number of armoured D7R II. The current model is the D7R Series 2 Track-Type Tractor and will be replaced by the D7E in early 2009.