The 931’s immense work capacity is much due to the brand new 3-pump hydraulics, split into dual circuits which separate pressure levels. The system is power-regulated against the diesel engine and offers a class-leading hydraulic capacity of 584 l / min. Unique pressure and flow optimization enables you to work considerably faster without losing hydraulic power. You can operate several crane and head functions simultaneously with maximum hydraulic power, such as slewing the crane, feeding a log and manoeuvring the machine with optimally low fuel consumption.