Product Overview Hydraulic main pump assembly designed for Komatsu PC3000-6 and PC4000-6 mining excavators. Built as a variable-displacement axial piston pump with integrated regulator valve group, it supplies high-pressure flow to the implement and travel circuits under the machine's open-circuit, electronically managed hydraulic system. The assembly is supplied complete and ready for installation after connecting suction, pressure and case-drain lines. Compatibility must be