20741620 Volvo FM13 D13C Overflow Valve

What does an overflow valve do?

This injector pump overflow valve is a critical control component designed to maintain constant internal pressure within the injection pump. By redirecting excess fuel back to the return line, it ensures precise fuel metering and engine stability. This high-strength component is manufactured to meet rigorous requirements for heavy commercial vehicle fuel systems.

Vehicle and engine compatibility

This specific part is fitted to Volvo FM13 trucks equipped with D13C engines. It serves as a reliable replacement to ensure the fuel system operates within factory specifications, maintaining optimal pressure balance during various engine loads.

Installation and maintenance guidance

For proper installation, technicians should ensure the M10x1 thread interface is clean and free of debris. Because any air or contaminant entering the fuel system can cause significant faults, it is recommended that an experienced workshop performs the replacement and ensures the system is thoroughly bled of air after installation.

OE cross-reference

0103 064 (Injector Pump Overflow Valve) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20741620.