#Cat bulldozer generator#
Instead, it turns a generator that creates as many as 330 amps of AC electrical current at 480 volts. Though huge, it’s a liter smaller than the unit in the D7R, and-for the first time-it isn’t mechanically connected to the tracks. The engine is a turbocharged diesel-a 9.3-liter inline-six that makes 235 horsepower. Still, in full-on work mode, the D7E consumes fuel at a rate of five to nine gallons per hour, which is why it comes with a tank as large as 126 gallons.
#Cat bulldozer manual#
At the same time, the new dozer’s electric drivetrain consumes 25 percent less fuel, thanks in part to a downsized diesel engine and the elimination of the efficiency-sapping torque converter and three-speed manual gearbox, which it no longer needs.
#Cat bulldozer series#
Apparently they prefer to launch their sloppy missiles onto land, and this tactic reduces the amount of guano spattering dozers.Ĭompared with the similarly sized, conventionally powered D7R Series 2 that it replaces, the D7E’s overall performance is up 10 percent, which is measured by how much material can be pushed in an hour by its blade-it’s five feet high and 13 feet wide. However, customers can choose custom colors for example, did you know that machines destined for landfills are often painted blue? That’s done in an attempt to fool birds into thinking they’re looking down at water. But somehow they still arrived at exactly the same paint scheme as before: uniform dull yellow. The company says the D7E project involved almost 500 engineers over the course of roughly a decade to produce this completely new dozer with the first-ever electric drivetrain. In Caterpillar’s lineup of dozers, the D7E fits roughly in the middle at the light end, there’s the 17,000-pound D3, which might be used for small commercial construction, and at the other end, there’s the mammoth D11, an intimidating 250,000-pound brute built for mining work, with a nine-foot-tall blade and nearly seven-foot-tall tracks. This 60,000-pound D7E-that’s as much pork as 10 Range Rovers-is about six inches longer than a Chevy Suburban (including the blade), but it’s more than nine feet wide. in 1925, and still produces one of the biggest chunks of revenue for the world’s largest maker of construction and mining equipment. uh, wait, what is it again? “We consider this a diesel-electric hybrid powertrain,” says senior project engineer Keith Heiar, “but we’re not labeling it with the ‘hybrid’ word on the side of the machine.” That’s because, although the company’s first-ever electric drivetrain is the greenest thing in the stable, it doesn’t have auxiliary battery storage and therefore doesn’t fit the category as defined by the automotive world.Īmong Caterpillar’s almost 30 different categories of machines, the D7E belongs to the rather clumsily alliterative and repetitive “track-type tractor” unit these are commonly referred to as “dozers.” This type has a long history, dating back to the formation of Caterpillar Tractor Co. From the August 2010 issue of Car and Driver.Ĭaterpillar’s new D7E bulldozer is the world’s first hybrid-uh, electric.
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