239133 Volvo FL12 TD122 Overflow Valve

What does an overflow valve do?

The injector pump overflow valve is a vital pressure control component that manages fuel circulation within the injection pump of heavy commercial vehicle engines. By redirecting excess fuel back to the low-pressure circuit, it maintains a constant recirculated volume at a specific pressure threshold, which is essential for stable combustion and air purging.

Vehicle and engine compatibility

This specific component is designed for use in Volvo FL12 trucks featuring the TD122 engine. It serves as a reliable replacement for maintaining the internal pressure balance of the fuel system, helping to prevent irregular fuel flow and performance drops in heavy-duty applications.

Installation and maintenance

For workshop technicians, ensuring a clean environment during installation is critical to prevent contaminants from entering the fuel system. When replacing this component, it is essential to bleed air from the system and verify that the part matches the specific requirements of the injection pump to ensure proper pressure regulation.

Troubleshooting and selection

Consult your authorized distributor.

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.