The Fuel Injection Pump Solenoid for CAT 320D is a critical electrical component mounted on the fuel pump of 320D / C4.4 / C6.6 engines, used to precisely control fuel flow into the high-pressure section of the pump. Part number frequently used is 326-4700 (or 312-5620 in some variations) depending on pump model. This solenoid opens or closes based on ECU signals and regulates how much fuel the pump pressurizes. A failing solenoid can lead to issues like poor rail pressure, misfires, or failure to build injection pressure, which in turn affects performance and emissions.
Key Features & Insights:
-
Compatible part number 326-4700 for many CAT 320D engines.
-
Alternative / related solenoid: 312-5620, used in certain fuel pump assemblies for 320D / C4.4 / C6.6 engines.
-
Controls fuel admission to the high-pressure pump chamber, enabling proper rail pressure for injection.
-
Durable design to function reliably in high-vibration, high-heat environments.
-
Replacement recommended when diagnosing low pump pressure, erratic fuel delivery, or engine stalling / failure to start.
-
Because this is an electrical component, check wiring and ECU signal when diagnosing — a bad solenoid may not always be mechanical failure.
When to Replace:
-
If you observe reduced engine performance, injection pressure codes, or engine stalling tied to the pump, test the solenoid first.
-
Replace during fuel pump overhauls — solenoids are relatively cheap compared to the cost of a pump failure.
-
After replacement, ensure the fuel system is bled properly and check for consistent rail pressure.
Contact for Orders:
📞 +91 78885 29020
📧 paldieselservice.chd@gmail.com
Cat Fuel injection pump solenoid 320D 248-1064, 2481064-1
Reviews
There are no reviews yet.