21221878 Volvo 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 and the radiator. By maintaining constant fluid motion, it prevents overheating and ensures the engine operates within its ideal thermal range, which is vital for long-term component durability in heavy-duty applications.

Compatible Volvo FM models and engines

This specific unit is compatible with Volvo FM trucks, including models such as the FM 480, FM 440, FM 380, FM 340, FM 300, FM 400, FM 360, FM 390, and FM 430. It is also suitable for Volvo FM13 engines with the D13B designation.

Maintenance and replacement guidance

Technicians should inspect the pump for signs of coolant leakage from the weep hole or unusual bearing noise during routine maintenance. For optimal performance, it is recommended to check the water pump alongside the timing belt or alternator belt service to prevent unexpected downtime.

Troubleshooting cooling issues

Regular monitoring of the cooling system helps prevent issues such as impeller wear or gasket failure that could lead to serious engine damage.

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 21221878.