The world’s biggest trucks – Caterpillar 797,797 B
Caterpillar 797 trucks, the first awarded in 2000-2001 the largest string.  V24-cylinder engine to its staggering 3400 horsepower. 797, 23 feet high, 47.5 feet long, 30 feet wide, when the dump were hoisted up 50 feet in height.  There are eight computers to monitor the oil pressure, torque, machine performance and tire temperature.  797 on the Michelin tires are designed for customization. Each tire has a 13 feet high, cost 30,000 U.S. dollars. 797 equipped with 850 gallons of the fuel tank, 1800 gallons of the fuel tank is also optional.  The vehicle itself was sold three hundred four hundred thousand dollars.
In the back of each wheel has a group of 42-inch brake discs, front 10, rear wheel 15. A computer controls the brake cooling system, pump 1160 gallons per minute the speed of the oil through the radiator on the disc, so that the brakes take away the enormous heat generated.  797 of the dump to accommodate 360 tons, but the loading of ore can easily reach 400 tons of time, coupled with weight of 288 tons, so the total mass has reached 648 tons.  Surprising is that its maximum speed is 40 mph. 
It’s almost crazy fuel consumption, with an average 65 gallons per hour, meaning that only run 0.3 miles per gallon.  Can be is such a car, around the clock at work, only regular maintenance in order to rest. 

Main parameters Model: CATERPILLAR 797
Type: mid-engined rear-wheel drive, 2 2 dump truck
Price: 3.43 million U.S. dollars
Engine Model: Cat 3524B HD TA
Displacement: 117.122 liters
Compression ratio: 15.5:1
Transmission: 7-speed automatic
Max power: 3400 hp / 1,750 rpm Maximum torque: 1677 NIU * m / 1300
Maximum speed: 1950
Average fuel consumptiontransfer: 788 L / 100 kilometers