21697342 Volvo FM13 D13A Overflow Valve

What does an overflow valve do?

This injector pump overflow valve serves as a critical control component within the fuel injection system. Its primary role is to maintain constant internal pump pressure by redirecting excess fuel back to the return line, which is essential for stable engine operation and consistent fuel delivery.

Vehicle and engine compatibility

This specific part is compatible with Volvo FM13 trucks equipped with D13A engines. It provides a reliable solution for heavy commercial vehicle fleets requiring precise fuel regulation. The component is engineered to meet OE specifications for seamless integration into the existing fuel system.

Installation and maintenance

For proper installation, technicians should ensure a clean working environment to prevent contaminants from entering the fuel lines. This valve features an M10x1 thread size. It is recommended that an experienced workshop performs the replacement to ensure the system is properly bled of air after installation.

Troubleshooting and selection

Monitoring fuel consumption and idle stability can help identify when a relief valve requires attention. Selecting a high-strength component ensures long-term durability under heavy-duty operating conditions. Consult your authorized distributor.

OE cross-reference

0103 064 (Injector Pump Overflow Valve) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21697342.