239133 Volvo VHD D12 Overflow Valve

The injector pump overflow valve is a critical control component that maintains constant internal pump pressure by redirecting excess fuel back to the return line. This component is essential for regulating the volume of fuel recirculated, which directly affects engine power, idle stability, and overall fuel consumption levels in heavy-duty diesel engines.

This specific overflow valve is compatible with Volvo VHD trucks equipped with D12 engines. It is engineered to meet the rigorous demands of heavy commercial vehicle service, ensuring that the fuel system operates within precise pressure thresholds to prevent irregular fuel flow or engine performance drops.

When performing maintenance or replacement, technicians should verify the exact pump specifications to ensure correct opening pressure. Proper installation ensures that the pressure balance within the injection pump remains stable, preventing air ingress and maintaining consistent fuel delivery to the injectors.

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.