Komatsu 6144-61-1500 Water Pump Assembly

The 6144-61-1500 water pump assembly is a gear-driven centrifugal pump designed for the Komatsu 4D94 engine series. It features a cast iron housing and steel impeller construction to withstand heavy-duty operating cycles in construction machinery. The unit integrates the bearing housing, seal assembly, and impeller in a single housing flange mounting configuration. This component regulates engine temperature by circulating coolant through the engine block and radiator. It is engineered to match OEM flow and pressure specifications for the 4D94-2P, 4D94-2N, and 3D94-2A engine variants. Direct replacement for OEM part numbers 6144-61-1500, 6144-61-1501, 6144611500, and 6144611501. Compatible with serial number breaks including 4D94-2P S/N 12336-UP and D21P-5 S/N 45007-UP.