21284318 Volvo FM Water Pump

What does a water pump do?

This water pump serves as a critical component within the engine cooling system, ensuring the consistent circulation of coolant between the engine and the radiator. By maintaining precise thermal management, it prevents engine overheating and supports long-term component reliability in heavy commercial vehicles.

Vehicle compatibility and fitment

This part is designed for compatibility with Volvo FM series trucks, including both FM II and FM III models. Specifically, it fits various configurations such as the Volvo FM 380, FM 420, FM 460, and FM 500. These components are essential for maintaining the operational integrity of these high-performance engines.

Installation and maintenance

For optimal performance, technicians should inspect the pump during routine belt service. When replacing a water pump, it is recommended to check the condition of the belts and seals to prevent future leaks or bearing noise. Proper installation ensures the impeller and mechanical seals function correctly under heavy-duty thermal loads.

Troubleshooting and inspection

Monitoring for signs such as coolant leakage from the weep hole or unusual bearing noise can help identify replacement needs before a system failure occurs. This ensures continuous uptime for fleet managers and workshop technicians alike.

OE cross-reference

525.03.0005 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21284318.