The crawler excavator R 944 C Litronic is a machine for multiple application ranges. A multitude of attachment options and variants of undercarriages allow an optimal configuration to achieve the highest performance in all application ranges. A hydrostatic fan drive and a separate swing circuit, as well as an efficient air-conditioning system and a sensor-controlled automatic idling also contribute to the standard machine configuration. The engine generation, as further developed for the “C-series”, assures an effective power delivery, a high efficiency degree, long life expectancy and complies with the emission standard 3a / Tier III.