21221878 Compatible Volvo FH 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 block, cylinder head, and radiator. By maintaining consistent flow, it prevents engine overheating and ensures stable operating temperatures during heavy-duty service. The unit is constructed using high-strength components to withstand the rigorous thermal and mechanical stresses of heavy commercial vehicle engines.

Compatible Volvo FH engines

This specific model is designed for compatibility with Volvo FH models including the 440, 520, 480, 400, and 500 variants. It is also suitable for Volvo FH II series engines such as the 500, 420, 460, 540, 400, 380, 440, 520, 480, and the LNG versions like the 420 LNG and 460 LNG. This part ensures precise fitment for these specific engine configurations.

Installation and maintenance

For optimal performance, technicians should inspect the pump during routine belt or timing belt service intervals. When replacing the unit, it is advisable to check the condition of the mechanical seals and gaskets to prevent future coolant leaks. Ensuring proper mounting and alignment during installation helps prevent premature bearing wear and noise.

Troubleshooting and monitoring

Regular monitoring of coolant levels and checking for signs of leakage from the weep hole can help identify potential issues before they lead to engine overheating. Maintaining the integrity of the entire cooling system is essential for fleet reliability.

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.