The dozer blade on front of the tractor usually comes in 4 varieties: The Egyptian Army operates an unknown number of armored D7R II. The United States Marine Corps replaced its fleet of D7Gs with John Deere's 850J MCT in 2009. Later, the US Army developed a remote controlled version of the D7G for mine-clearing applications. The armor was developed by the Israel Military Industries (IMI). The US Army used armored D7G to clear mine fields and unarmored D7G and D7H for earthworks. Specially modified D7E's fitted with Rome plows were used to clear forest in the Vietnam war. This makes it ideal for working on very steep slopes, in forests, and for backfilling pipelines safely without risking damage to the pipe.Īn agricultural version without the blade and rippers is commonly used by farmers. The vehicle is powerful, yet small and light (16 to 20 short tons ) depending on configuration). It is primarily used to move material short distances or through challenging terrain. The D7R Series II at 240 hp (180 kW) power and an operating weight of around 20 tons, is in the middle of Caterpillar's track-type tractors, which range in size from the D3 77 hp (57 kW), 8 short tons (7.3 t), to the D11 935 hp (697 kW), 124 short tons (112 t). Compared to the Caterpillar D7R Series II, the D7E was projected to deliver 25 percent more material moved per gallon of fuel, 10 percent greater productivity and 10 percent lower lifetime operating costs. The C9.3 powers a generator that turns out electricity that supplies power to a pair of AC drive motors. This 235 hp (175 kW) D7E comes with a diesel-electric drive system powered by a 537cid C9.3 diesel engine. In March 2008, at Conexpo 2008 held every 3 years in Las Vegas, Caterpillar introduced the D7E. The high-drive design returned in 2020 with the introduction of the D7 (forgoing a generational letter under Caterpillar’s new naming system). The electric drive D7E entered service in early 2009, returning to a traditional ‘flat-track’ configuration for this iteration only. The D7R replaced the D7H in 1996, followed by the D7R Series 2. In 1986 the 215 hp (160 kW) D7H was the first D7 equipped with Caterpillar’s elevated drive sprocket undercarriage. The Caterpillar D7 is a medium track-type tractor manufactured by Caterpillar Inc. The new Cat D7E with diesel-electric Drive USMC D7G D7 armored bulldozer on flatbed truck for transport Two armored D7 bulldozers out on a mission in Ramadi, Iraq.
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