The 3PS system was designed to increase productivity and reduce fuel consumption.
It has a triple pump system that allows operators to perform many tasks at the same time. The three pumps are split into several hydraulic circuits. The operator can use several functions at the same time without the operator being limited by a lack of hydraulic flow and power. This is also claimed to improve fuel consumption, as the new system is more energy efficient per processed volume of timber compared to a harvester without the triple pump system. The 3PS system is based on three hydraulic pumps, where the transmission pump is separate from the two other pumps, which are only used for the machines working hydraulics. The working hydraulics are split into two circuits, a high pressure and low pressure circuit. For processing functions that need lots of oil (or hydraulic power), the two circuits are combined for maximum power and performance. The low pressure circuit is otherwise used for hydraulic functions with lower needs, making sure that the 3PS system does not produce unnecessary hydraulic power. Hydraulic power demands are also coordinated by the machines diesel engine power output, and system power is regulated by the MaxiXplorer control system. The 3PS is a standard feature on the new Komatsu 901, 911, 931 and 951 harvesters. Source: http://www.komatsuforest.com/default.aspx?id=1848&newsid=133103