20741620 Volvo FH13 D13C Overflow Valve

What does an overflow valve do?

The injector pump overflow valve is a critical control component that maintains internal pump pressure by redirecting excess fuel back to the return line. This component ensures that the fuel injection pump operates at a stable pressure, which is vital for maintaining engine power and consistent idle stability in heavy commercial vehicles.

Vehicle and engine compatibility

This specific part is compatible with Volvo FH13 trucks equipped with D13C engines. It serves as a reliable solution for maintaining the fuel system's integrity and ensuring the injection pump performs according to technical requirements.

Installation and maintenance

When performing installation, ensure the M10x1 thread is clean and seated correctly. Because any air or debris entering the fuel system can lead to engine faults, it is highly recommended that a workshop technician performs the replacement and bleeds the system of air afterward.

Troubleshooting and selection

Monitoring fuel consumption and engine performance can help identify when an overflow valve requires attention. Selecting the correct component ensures the pressure balance remains within the manufacturer's specified tolerances.

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.