0103 064 Injector Pump Overflow Valve for Volvo

What does an injector pump overflow valve do?

The injector pump overflow valve is a critical component designed to maintain constant internal pressure within the fuel injection pump by redirecting excess fuel back to the return line. By regulating this pressure, the valve ensures stable engine idling and consistent fuel delivery, which is essential for maintaining optimal engine power and preventing irregular combustion cycles.

Compatible vehicles and engines

This component is compatible with a wide range of heavy commercial vehicle engines, including Volvo models such as the FH series (D12, D13, D16), FM series (D10, D11, D12, D13), FMX, VHD, VNL, and B-series engines. It is also suitable for Renault Trucks engines including the Kerax, Magnum, and Premium models equipped with DXi series engines. Additionally, it fits Mack Granite and Pinnacle units with MP7 and MP8 engines.

Installation and maintenance

For proper installation, technicians should ensure the M10x1 thread is clean and free of debris. It is vital to verify that the opening pressure of the valve matches the requirements of the specific injection pump installed in the engine. Regular inspection of the valve during fuel system maintenance can help prevent symptoms like increased fuel consumption or unstable idling.

Selection guidance

Always confirm the compatibility with your specific engine type before installation to ensure precise fuel regulation and long-term system reliability.

OE cross-reference

0103 064 (Injector Pump Overflow Valve) is the equivalent of the Renault Trucks and Volvo OE numbers. This part directly replaces Renault Trucks OE numbers 7420741620, 7421010372, 7421697342. It also replaces Volvo OE numbers 20523255, 20741620, 21010372, 21419969, 21697342.