239133 Volvo FL12 TD123 Overflow Valve

What does an overflow valve do?

The injector pump overflow valve is a critical component within the fuel injection system that maintains pressure balance by redirecting excess fuel back to the low-pressure circuit. This component is essential for ensuring a constant recirculated volume, which prevents irregular fuel flow and helps purge air from the system.

Vehicle and engine compatibility

This specific overflow valve is compatible with Volvo FL12 trucks featuring the TD123 engine. It serves as a reliable replacement for maintaining the internal pressure thresholds required for optimal fuel delivery in heavy commercial vehicle applications.

Installation and maintenance guidance

When performing installation, technicians should ensure a clean working environment to prevent contaminants from entering the fuel lines. After replacing the valve, it is vital to bleed the air from the fuel system to ensure correct operation and prevent engine stumbling.

Troubleshooting and selection

Regular inspection of the overflow valve can help prevent issues like increased fuel consumption or loss of engine stability. Consult your authorized distributor to check the compatibility list.

OE cross-reference

0101 045 (Injector Pump Overflow Valve) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 239133.