The Caterpillar 789 dump truck is a model of haul trucks, typically used in open pit mining, manufactured by Caterpillar Inc.^[1][2] The 789 has a capacity of 177 tonnes, and its engine can produce 1770 horsepower. While some competing products use hybrid drive, the Caterpillar 789 has an entirely mechanical drive-train. The first Caterpillar 789 trucks were introduced in 1986.^[3]

The vehicle's controls are designed to work much like those of an ordinary truck.^[1] However, they have multiple mechanisms for the driver to slow or stop the vehicle. Next to the traditional brake pedal there is a second foot pedal to activate a secondary braking system. There is a lever to the right of the steering wheel, called the "retarding brake", used for less intense braking. Finally, the vehicle's drive-train will automatically change gears, while descending inclines, to help the driver keep its speed under control.

Because the vehicle provides the driver with a limited view, with many blind spots, they are equipped with multiple proximity sensors, and closed circuit TVs cameras.^[1]

The 789 averages 0.3 miles per US gallon (7.8 L/km).^[1] It has six tires, each of which are 12 feet (3.7 m) in diameter and cost $50,000 to replace.^[1]

Malcolm Nance, the author of Defeating ISIS: Who They Are, How They Fight, What They Believe, described ISIS suicide bombers driving Caterpillar 789 trucks loaded with explosives into fortifications.^[4]