21218878 Volvo FMX/FM Water Pump

What does a water pump do?

This water pump serves as a critical component within the engine cooling system, responsible for circulating coolant between the engine block and the radiator. By maintaining consistent flow, it prevents engine overheating and ensures the thermal stability required for heavy-duty operations.

Compatible Volvo vehicles

This component is specifically designed for Volvo trucks, including the FM series (models 300 through 480) and the FMX series (including FMX II, FMX III, and LNG variants). It provides a reliable solution for fleet managers and workshop technicians looking to maintain high-performance engine cooling in heavy commercial vehicles.

Maintenance and installation

To ensure proper function, technicians should inspect the pump during routine belt services. Monitoring for signs such as coolant leaks from the weep hole or unusual bearing noise can prevent more significant engine issues. Proper installation ensures seamless integration with the existing cooling circuit.

System reliability

Maintaining the integrity of the cooling system is essential for the longevity of heavy-duty engines. For optimal performance, always verify that the pump meets the specific requirements of the vehicle's engine configuration.

OE cross-reference

525.03.0006 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21218878.