Caterpillar 320D Diesel Fuel Pump Solenoid Valve

Caterpillar 312-5620 Diesel Fuel Pump Solenoid Valve is a solenoid‑operated valve assembly designed for CAT 320D fuel pumps and the C6.4/C6.6 engine platforms. This electronic valve sits on the injection pump and governs fuel metering by controlling the pump’s hydraulic timing, delivering precise fuel flow and enabling proper engine shut‑off during operation. The 312-5620 valve is a common replacement part for CAT 320D models that use the C6.4 or C6.6 engine variants, reflecting its role in maintaining reliable pump performance across the 320D family. When selecting this part, verify that your pump assembly matches the 312-5620 specification and that the engine family corresponds to C6.4 or C6.6 to ensure correct fitment and operation. Replacing a worn or faulty solenoid valve with the correct 312-5620 helps restore intended fuel delivery characteristics and pump response, supporting consistent starting and smooth idle on 320D machines. This part is widely listed in supplier catalogs as the 312-5620 CAT fuel pump solenoid valve for 320D/C6.4/C6.6 configurations, underscoring its role as a standard maintenance replacement for CAT diesel injection systems.