what is a 777 dump truck?

A 777 dump truck, also commonly called a triple 7 dump truck or rigid body dump truck, is a large, off-highway haul truck typically used in open-pit mining and quarrying applications. Here’s a breakdown of its key characteristics:

Size and Capacity:

  • Large size: These trucks are massive, with a gross vehicle weight (GVW) exceeding 100 tons when fully loaded. They stand tall, often exceeding 10 meters (33 feet) in height and stretching over 15 meters (50 feet) in length.
  • High capacity: Their large dump beds can hold significant amounts of material, typically ranging from 50 to 100 tons per load. This allows them to efficiently transport large quantities of mined materials like rock, ore, and sand.


  • Open-pit mining: Due to their size and capacity, 777 dump trucks are well-suited for hauling large volumes of material in open-pit mines, where vast quantities of earth and rock need to be removed to access valuable resources.
  • Quarrying: They are also commonly used in quarries for extracting and transporting crushed rock, gravel, and other construction materials.
  • Limited use on public roads: Due to their size and weight, 777 dump trucks are not designed for regular use on public roads. They are primarily used in off-highway environments like mine sites and quarries.


  • Caterpillar: The Caterpillar 777 is the most widely recognized model in this category. It’s a popular choice globally due to its robust design, reliability, and efficient performance.
  • Other manufacturers: While Caterpillar is a dominant player, other manufacturers like Komatsu and Hitachi also offer similar large, off-highway dump trucks in the market.

Additional Notes:

  • Durability: Built to withstand the demanding conditions of mining and quarrying environments, 777 dump trucks are known for their durability and ability to operate reliably under heavy loads.
  • Advanced features: Modern 777 dump trucks often incorporate advanced features like automatic transmissions, engine performance optimization systems, and improved operator comfort technologies to enhance efficiency and safety.

Overall, the 777 dump truck is a powerful and specialized vehicle crucial for large-scale mining and quarrying operations due to its ability to efficiently transport massive quantities of materials in demanding off-highway environments.