21218878 Volvo FMX D11K 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 and the radiator. By maintaining proper thermal regulation, it prevents engine overheating and protects high-strength components from thermal stress during heavy-duty operations.

Vehicle and engine compatibility

This component is specifically engineered for Volvo FMX series vehicles featuring the D11K engine, including various configurations like the 480, 440, and 400 models. It is also compatible with several Volvo FM series variants such as the FM 480, FM 440, FM 380, FM 340, FM 300, FM 400, FM 360, FM 390, and FM 430.

Installation and maintenance guidance

For professional workshop technicians and fleet managers, we recommend inspecting the pump during routine belt service intervals. When replacing a water pump, it is vital to check the integrity of the housing and the condition of the mechanical seals to prevent leaks or bearing play. Always ensure that all mounting surfaces are clean to guarantee a perfect seal during installation.

Troubleshooting and inspection

Monitoring for signs such as coolant leakage from the weep hole or unusual mechanical noise can help identify potential failures before they lead to system breakdown.

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.