Drive
Workability & Durability
Gathering the technologies proven in construction machinery, called "Electronically-controlled Hydro-Static Transmission (HST)" and "Variable displacement pump with Closed-center Load Sensing System (CLSS)". The exceptional operability of the HST provides exceptional work efficiency. Higher durability and reliability with Komatsu original components.
Komatsu's Technologies Achieve an Outstanding Low Fuel Consumption and CO2 Exhaust
The combination of the high efficiency engine, CLSS and HST technology proven in construction machinery can provide powerful performance with at most 30% reduction on fuel consumption. There are no clutches which generate a loss in our HST, so engine output can be used effectively. Heavier duty operation provides bigger fuel saving benefit with Komatsu FH series.
Reduced CO2 Emission During High Load Work
The reduced fuel consumption enables reducing CO2 emissions. In case of high load work, about 10.7 ton/year CO2 emission is reduced.
Variable Engine Output Control Function
The HST controller senses weight of the load, automatically sends signal to engine ECM to control engine output to balance necessary power and reduce fuel consumption.
Gathering the Technologies Proven in Construction Machinery
The travel system is “Electronically-controlled HST,” Komatsu’s unique hydraulic drive system that has been employed for Komatsu wheel loaders and bulldozers. The HST hydraulic system uses “Variable displacement pump with CLSS,” a highly efficient hydraulic system employed in Komatsu hydraulic excavators. All the components contribute to fuel saving, reduction of burden on the environment and outstanding maneuverability.
Exceptional Operability of the HST
The HST drive system is continuously variable speed transmission and provides smooth acceleration and stepless ratio changes, thus there are less shock and worries for load shifting.
Higher Durability and Reliability with Komatsu Original Components
All of the main components such as engine, hydraulic pumps, hydraulic motor and the controller that sophisticatedly controls these components are designed, developed and manufactured by Komatsu.