More and more innovative technologies were applied to products with a heavy focus on hydraulic shovels. Using mechatronics for engine control was one of the examples of Japan's advanced electronics technology that surpassed the world standards.
Since HD680 in 1974, the demand for 85-ton class Dump trucks was rising, as larger models were desired more at mines.
Komatsu first developed HD780, which it shared many parts with. Then they built HD785 with a more powerful engine and larger tires, which was commercialized.
Load capacity: 78,000kg
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.