21781059 FMX III Water Pump — Volvo Compatible

What does a water pump do?

This water pump serves as a critical component within the engine cooling system, responsible for circulating coolant between the engine and the radiator. By maintaining consistent fluid flow, it prevents overheating and ensures the engine operates within its intended thermal parameters during heavy-duty service.

Vehicle compatibility and engine fitment

This component is specifically designed for compatibility with various Volvo models, including the FMX III (330, 370, 380, 410, 430, 450, 460), FMX II (330, 370, 410, 450), FM (330, 370, 410, 450), and standard FMX series. It is built with high-strength components to withstand the rigorous demands of construction machinery and heavy commercial vehicle engines.

Installation and maintenance guidance

During installation or routine maintenance, technicians should inspect the pump housing and shaft for any signs of wear or leakage. It is recommended to check the drive belt tension and inspect the mechanical seal during every cooling system service interval to prevent unexpected engine overheating.

Troubleshooting and inspection

Regular inspection of the coolant levels and pump operation can help identify potential failures such as bearing play or leaks from the weep hole before they lead to significant engine damage.

OE cross-reference

525.03.0009 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21781059.