21419969 Volvo FH13 D13B Overflow Valve

What does an overflow valve do?

This injector pump overflow valve is a critical component that regulates internal pump pressure by redirecting excess fuel back to the return line. By maintaining a precise pressure balance, it prevents fluctuations that could lead to irregular idling or decreased engine performance in heavy commercial vehicles.

Compatible vehicles and engines

This specific part is engineered for Volvo FH13 trucks equipped with D13B engines. It serves as a reliable replacement for original components, ensuring the fuel system maintains the necessary pressure required for consistent engine operation across demanding duty cycles.

Installation and maintenance

Installation should be performed by a workshop technician to prevent air or debris from entering the fuel system. When installing this M10x1 thread component, ensure all connections are secure and the system is properly bled of air to maintain optimal performance.

Troubleshooting and selection

Monitoring fuel consumption and idle stability can help identify if the overflow valve requires replacement. Selecting a high-strength component ensures long-term reliability in the engine's fuel delivery system.

OE cross-reference

0103 064 (Injector Pump Overflow Valve) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21419969.