0103 128 Injector Pump Overflow Valve for Volvo and Renault Trucks

What does an injector pump overflow valve do?

The injection pump overflow valve is a critical control component that maintains internal pump pressure by redirecting excess fuel back to the return line. By regulating this pressure, the valve ensures consistent fuel delivery to the injectors, which is vital for maintaining stable engine idling and optimal combustion efficiency in heavy commercial vehicle engines.

Compatible vehicle engines and models

This component is compatible with a wide range of heavy-duty engines, including Volvo D13, D16, FM, and VHD series, as well as Renault Trucks DXi11, DXi12, and DXi13 engines. It is also suitable for Mack Granite (MP7) and Pinnacle (MP8) applications. These parts are designed to meet the rigorous demands of professional workshop environments.

Installation and maintenance guidance

To ensure correct fitment, technicians should verify the specific engine model and pump type before installation. Proper maintenance of the fuel system, including regular checks of the overflow valve's sealing elements, helps prevent symptoms like increased fuel consumption or erratic engine performance. Consult your authorized distributor for compatibility details.

Troubleshooting fuel pressure issues

When replacing this component, it is essential to ensure the new valve matches the opening pressure requirements of the existing injection pump to maintain system balance.

OE cross-reference

0103 128 (Injector Pump Overflow Valve) is the equivalent of the Renault Trucks and Volvo OE numbers. This part directly replaces Renault Trucks OE number 7420884328. It also replaces Volvo OE numbers 20730966, 20884328.