20921947 Volvo FM Series 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 and the radiator. By ensuring a constant flow of thermal management fluid, it prevents engine overheating and maintains stable operating temperatures during heavy-duty service. Built with high-strength components, it is designed to withstand the rigorous thermal and mechanical stresses found in commercial vehicle environments.

Compatible vehicles and engines

This component is specifically compatible with Volvo vehicles, including the FM III series (such as the 380, 460, 430, and 330) and the FM II series (including the FM 330, 450, 410, and 370). It is also suitable for various other Volvo FM configurations used in heavy commercial applications.

Installation and maintenance

For optimal engine health, technicians should inspect the pump during routine cooling system maintenance. When replacing this unit, it is recommended to check the condition of belts and gaskets to ensure a leak-free installation. Proper fitment is essential to maintain correct coolant flow rates and pressure levels within the radiator circuit.

Troubleshooting and inspection

Monitoring for signs such as coolant leakage from the weep hole or unusual mechanical noise can help identify potential failure before it leads to engine overheating.

OE cross-reference

525.03.0009 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20921947.