21280077 Volvo FMX & FM Water Pump

What does a water pump do?

This water pump serves as a critical component within the engine cooling system, facilitating the continuous circulation of coolant between the engine block and the radiator. By maintaining consistent fluid flow, it prevents overheating and ensures the longevity of high-strength engine components under heavy-duty operating conditions.

Vehicle compatibility and fitment

This part is specifically designed for Volvo FM series models, including variants such as the FM 300, FM 340, FM 360, FM 380, FM 390, FM 400, FM 430, FM 440, and FM 480. It is also compatible with various Volvo FMX models like the 400, 440, and 480. This component is essential for maintaining thermal stability in these heavy commercial vehicles.

Installation and maintenance guidance

During installation or routine maintenance, technicians should inspect the pump housing and shaft for any signs of wear or leaks. It is highly recommended to check the drive belt and associated seals during replacement to ensure the integrity of the entire cooling circuit. Consult your authorized distributor to verify specific fitment.

Troubleshooting and inspection

Monitoring for symptoms such as coolant leakage or unusual mechanical noise can help identify potential failure before it impacts engine performance.

OE cross-reference

525.03.0020 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21280077.