85003125 Volvo FMX 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. By ensuring a consistent flow of coolant, it prevents engine overheating and maintains stable operating temperatures even under high thermal loads common in heavy commercial vehicle operations.

Compatible Volvo trucks and models

This part is specifically designed for Volvo FM and FMX series trucks. It is compatible with various models including the Volvo FM 480, FM 440, FM 380, FM 340, FM 300, FM 400, FM 360, FM 390, and FM 430. Additionally, it fits Volvo FMX II variants such as the 460, 330, 420, 500, 540, 370, 520, 430, 400, 440, and 480 models, as well as Volvo FMX and FMX III versions including the 480, 440, 400, 460 LNG, and 420 LNG.

Installation and maintenance guidance

For professional workshop technicians and fleet managers, it is recommended to inspect the pump housing and mechanical seals during routine cooling system maintenance. When replacing this component, it is best practice to check the condition of related belts and gaskets to ensure system integrity. Proper installation ensures the impeller operates smoothly without vibration or leakage.

Troubleshooting and monitoring

Monitoring for signs such as coolant leaks from the weep hole or unusual bearing noise can help prevent unexpected engine downtime. Maintaining this component ensures the longevity of the entire cooling circuit in your heavy commercial vehicle fleet.

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 85003125.