20523255 Volvo FM10 D10A Overflow Valve

What does an overflow valve do?

This injector pump overflow valve is a critical control component that maintains the internal pressure balance of the injection pump by redirecting excess fuel back to the return line. By regulating this flow, the valve directly influences engine idle stability and overall fuel consumption efficiency. VADEN ORIGINAL components are engineered to withstand the demanding operating conditions of heavy commercial vehicle engines.

Vehicle compatibility and fitment

This specific unit is designed for Volvo FM10 trucks equipped with D10A engines. It serves as a reliable replacement for fuel system components in these heavy-duty applications, ensuring that the injection pump operates within its required pressure parameters to prevent performance drops or erratic idling.

Installation and maintenance

For proper installation, technicians should verify that the M10x1 thread size matches the existing pump specification. It is recommended to inspect the mounting surface and any sealing elements during replacement to ensure a leak-free connection and stable fuel pressure regulation.

Troubleshooting guidance

If engine performance becomes inconsistent or fuel consumption increases, inspecting the overflow valve is a vital step in troubleshooting the fuel system.

OE cross-reference

0103 064 (Injector Pump Overflow Valve) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20523255.