20741620 Volvo FM13 D13B Overflow Valve

What does an overflow valve do?

This injector pump overflow valve is a critical control component that maintains constant internal pump pressure by redirecting excess fuel back to the return line. It plays a vital role in stabilizing engine idle and ensuring consistent fuel consumption under heavy-duty operating conditions.

Vehicle and engine compatibility

This component is specifically compatible with Volvo FM13 trucks equipped with D13B engines. It serves as a reliable replacement part to maintain the integrity of the fuel system during heavy commercial vehicle operations.

Installation and maintenance

Installation should be performed in a clean environment to prevent contaminants from entering the fuel circuit. Ensure the M10x1 thread is seated correctly and that the system is properly bled of air after installation to avoid performance issues.

Troubleshooting and selection

Regular inspection of the fuel system components can help prevent sudden loss of engine power or irregular idling caused by pressure imbalances.

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.