21781059 Compatible Water Pump — Volvo FMX

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. Engineered with high-strength components, it is designed to withstand the demanding thermal cycles and mechanical stresses typical of heavy commercial vehicle operations.

Compatible vehicles and engines

This component is specifically compatible with Volvo FMX models featuring D11K engines, including variants like the 330, 370, 410, 430, and 450. Additionally, it is fitted to Volvo FM series trucks such as the FM 330, FM 370, FM 410, and FM 450. Check the compatibility list.

Installation and maintenance

For optimal performance and to prevent overheating, technicians should inspect the pump during routine belt service. Monitoring for signs such as coolant leaks from the weep hole or unusual bearing noise can help prevent sudden engine failure. When replacing this unit, it is recommended to inspect associated belts and gaskets.

Troubleshooting guidance

Maintaining a reliable cooling system is vital for the longevity of heavy-duty engines in construction and transport applications. This water pump provides a reliable solution for maintaining steady temperature regulation during intense workloads.

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.