8/6/2023 0 Comments 1954 d2 dozerThe 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. D7 armored bulldozer on flatbed truck for transport
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