21221878 Volvo FMX D13C Water Pump

What does a water pump do?

This water pump serves as a critical component within the engine cooling system, ensuring the continuous circulation of coolant between the engine block and the radiator. By maintaining steady flow, it prevents overheating and protects heavy-duty engine components from thermal stress during intensive operation.

Vehicle and engine compatibility

This part is designed for Volvo FM models including the FM 480, FM 440, FM 380, FM 340, FM 300, FM 400, FM 360, FM 390, and FM 430. It is also compatible with Volvo FMX units equipped with D13C engines. This component is engineered to meet the rigorous demands of heavy commercial vehicle service.

Installation and maintenance guidance

To ensure correct installation, technicians should inspect the mounting surfaces and gaskets during replacement. It is recommended to check the condition of the drive belts and pulleys while performing service to prevent premature wear of the new unit. Proper alignment is essential to avoid bearing play or shaft vibration.

Troubleshooting and symptoms

Monitoring for symptoms such as coolant leaks from the weep hole or unusual mechanical noise can help identify potential failure before it impacts engine performance. Consult your authorized distributor.

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.