0101 040 Mercedes-Benz Compatible Overflow Valve

What does an overflow valve do?

This injector pump overflow valve acts as a critical pressure regulation component within the diesel fuel injection system. By redirecting excess fuel back to the return line, it maintains the necessary pressure balance inside the pump, which is essential for consistent fuel injection timing and volume.

Compatibility and application

Designed for heavy commercial vehicle applications, this component is compatible with Mercedes-Benz engines. It ensures that the internal pump pressure remains constant, preventing irregular fuel flow and helping to maintain engine idling stability. Check the compatibility list.

Maintenance and installation

For optimal performance, technicians should inspect the overflow valve during routine fuel system maintenance. A faulty valve can lead to increased fuel consumption or loss of power. Ensuring correct fitment and pressure settings is vital for long-term engine health and efficiency.

Troubleshooting fuel pressure

This part serves as a reliable replacement for worn components, helping to prevent air ingress and maintaining the integrity of the high-pressure circuit in heavy-duty diesel engines.

OE cross-reference

0101 040 (Injector Pump Overflow Valve) is the equivalent of the LASO and Mercedes-Benz OE numbers. This part directly replaces LASO OE number 20071504. It also replaces Mercedes-Benz OE number 4570700246.