Product Overview The K3V63S fan pump is a variable displacement piston pump with an electronic regulator, designed for Hitachi EX1200-6 and EX1200-7 excavators. It drives the auxiliary cooling fan and automatically adjusts fan speed based on oil temperature, ensuring efficient thermal management in demanding mining and construction environments. Part Numbers 4661674, 4482892 Model K3V63S Application Hitachi EX1200-6, EX1200-7 Excavators Function Auxiliary cooling fan drive