Since this era, the focus of domestic demand gradually started shifting from bulldozers to hydraulic shovels. Additional considerations, such as ease of operation, also became an important aspect of design.
This was the biggest Dump truck in Japan at the time. Due to its size, it was very hard to select and control quality of the right components and parts. It had the engine of Cummins' instead of Komatsu's, and tires of Bridgestone's that were required for size and strength.
Back then there was a large construction of a breakwater in the Canary Islands, a Spanish colony, located 100km west of the African continent, and 5 units of HD680 from the first mass production were supplied there. This let Komatsu gain a good reputation in Spain, and among 137 units of HD680 that were produced from 1975 through 1985, 49 units were used all over Spain.
Load capacity: 68,000kg
The history of the dump truck as a transporting vehicle is also the history of increasing the amount of loading to improve productivity at construction sites. At mines especially, new technology is being introduced consistently even today. Enlarging the size by mechanical and electrical formulas, and adding the GPS control system are some of the examples.