457 070 02 46 Injector Pump Overflow Valve for Mercedes-Benz

What does an injector pump overflow valve do?

The injector pump overflow valve serves as a critical pressure control component within the fuel injection pump of heavy commercial vehicles. By redirecting excess fuel back to the return line or low-pressure circuit, it maintains a constant internal pressure threshold. This mechanism is vital for stabilizing engine idle and ensuring consistent fuel flow throughout the combustion cycle.

Compatibility with Mercedes-Benz engines

This component is designed for use in various engine configurations, including those found in Mercedes-Benz heavy commercial vehicles. Proper function of the overflow valve ensures that the injection pump does not over-pressurize, which helps prevent irregular fuel delivery and maintains overall engine running stability.

Installation and maintenance guidance

For technicians performing fuel system maintenance, verifying the seat and spring tension of the valve is essential during pump servicing. Ensuring the component is installed correctly helps prevent symptoms such as increased fuel consumption or loss of power. Vaden Original components are manufactured to precise dimensions to ensure seamless integration into existing fuel systems.

Troubleshooting engine stability

Regular inspection of the fuel return lines and the valve itself can prevent unexpected downtime in fleet operations. If engine stability becomes irregular, checking this component is a standard diagnostic step for workshop professionals.

OE cross-reference

0101 040 (Injector Pump Overflow Valve) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number 4570700246.