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Updates for the 70-tones off-highway dumper Caterpillar

Updates for the 70-tones off-highway dumper Caterpillar

The new Cat® 775G Off-Highway Truck sets new performance standards for the model while meeting US EPA Tier 4 Final emissions standards. A combination of new drive train strategies and a 5 percent power increase over the previous model enable the 70-ton (63.5-tonne) payload class truck to hold a higher gear when climbing 10 percent grades in most applications. A number of new components and control changes boost efficiency. A key is the next generation of Cat transmission controls, named Advanced Productivity Electronic Control Strategy. The system enhances productivity, fuel efficiency and drive train durability, and it enables enhanced machine control.

To meet Tier 4 Final emissions regulations in the USA, the Cat C27 ACERT engine includes the Cat NOx Reduction System and Diesel Oxidation Catalyst. Working in combination with ACERT technology, the Cat NOx-Reduction System continually diverts and cools a small volume of the engine exhaust gases, then returns the cooled gases to the combustion chamber. This process reduces cylinder temperatures and, consequently, lowers NOx formation. The 775G engine produces net power of 779 hp (581 kW), and target gross weight of the truck is 246,500 lb (111 811 kg). As with the previous model, a number of different body options enable a customer to configure a truck to achieve optimum capacity and durability. The 775G will replace the 775F when it goes into commercial production in the fourth quarter of 2011.


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