21781059 Volvo FM D11B Water Pump

What does a water pump do?

This water pump serves as a critical component within the engine cooling system, driving the circulation of coolant to prevent overheating. Manufactured with high-strength components, it is designed to withstand the rigorous thermal and mechanical stresses typical of heavy commercial vehicle operations.

Compatible Volvo truck models

The unit is specifically fitted to Volvo trucks, including various FM series models such as the FM 330, FM 450, FM 410, and FM 370. It is also compatible with Volvo FM11 engines featuring the D11B configuration. This ensures precise fitment for fleet managers and workshop technicians performing engine overhauls or routine cooling system maintenance.

Installation and maintenance

For professional installation, technicians should verify the integrity of all coolant hoses and the thermostat performance during replacement. Ensuring correct mounting torque and using high-quality gaskets is essential to prevent leaks and maintain optimal pressure within the cooling circuit.

System reliability

Regular inspection of the pump impeller and bearing housing can help prevent unexpected downtime in heavy commercial fleets.

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.