20744939 Volvo FMX D13C Water Pump Equivalent

What does a water pump do?

The water pump serves as a critical component within the engine cooling system, acting as a centrifugal-type pump that continuously circulates coolant between the engine block, cylinder head, and radiator. This ensures that thermal loads are managed effectively during heavy-duty operations.

Vehicle and engine compatibility

This specific unit is compatible with Volvo FMX 480, 440, and 400 models utilizing the D13C engine. It is also engineered to fit a wide range of Volvo FM series trucks, including the FM 480, FM 440, FM 380, FM 340, FM 300, FM 400, FM 360, FM 390, and FM 430 models.

Installation and maintenance

For professional technicians and workshop specialists, it is recommended to inspect the pump alongside the timing belt or alternator belt during routine maintenance. Always check for signs of coolant leakage from the weep hole or unusual bearing noise to prevent engine overheating.

Troubleshooting guidance

Maintaining a stable cooling cycle is essential for preventing cavitation and erosion within the engine block. When replacing this component, ensure all gaskets and seals are seated correctly to maintain system pressure.

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 20744939.