21030340 Volvo FMX III Cooling System Water Pump

What does a water pump do?

This water pump plays a critical role in the engine cooling system by circulating coolant between the engine and the radiator. By maintaining constant fluid movement, it prevents overheating and ensures the engine operates within its designed thermal parameters, even under heavy loads.

Compatible Volvo models and engines

This component is specifically designed to fit Volvo FMX III models including the 380, 420, 460, and 540 variants. It is also compatible with several Volvo FM series engines such as the FM 380, FM 420, FM 460, and FM 500. These parts are essential for maintaining the reliability of heavy commercial vehicle engines during intensive operation.

Maintenance and replacement guidance

For optimal performance, technicians should inspect the pump during routine belt service. Signs of wear include coolant leakage from the weep hole or unusual mechanical noise from the bearing assembly. Regular checks help prevent unexpected downtime in fleet operations.

Troubleshooting cooling system issues

When replacing this unit, ensure all connections are secure and the cooling system is properly bled to avoid air pockets. Consult your authorized distributor for further information.

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 21030340.