21221878 Volvo FH D13K Water Pump

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. Reliable circulation is vital to maintain optimal operating temperatures and prevent engine overheating during heavy-duty operation.

Vehicle and engine compatibility

This part is specifically designed for Volvo FH (FH4/FH5) models, providing precise fitment for various configurations including the 400, 440, 480, 500, and 520 variants. It is engineered to meet the rigorous demands of the D13K engine series found in heavy commercial vehicles.

Maintenance and installation guidance

When performing engine maintenance, it is recommended to inspect the pump alongside the timing belt or alternator belt. Technicians should check for signs of coolant leakage from the weep hole or unusual bearing noise to ensure system integrity during scheduled service intervals.

Troubleshooting and selection

Check the compatibility list to ensure this component matches your specific engine requirements.

OE cross-reference

525.03.0006 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21221878.