Caterpillar C6.4 High Pressure Fuel Pump 2014-2022: OEM 326-4635

Quiet-Strength Fuel Delivery: Cummins C6.4 High-Pressure Fuel Pump (2014–2022, OEM 326-4635)

What is it?
The Cummins C6.4 High-Pressure Fuel Pump (2014–2022, OEM 326-4635) is a core component in the high-pressure common-rail fuel system for the C6.4 engine series. It takes low-pressure fuel from the supply system and compresses it to extremely high pressure to feed the injectors, enabling precise fuel delivery, proper combustion timing, and efficient engine operation.

Why Choose the Cummins C6.4 High-Pressure Fuel Pump (OEM 326-4635)?
This pump is built to Cummins’ original equipment standards—meaning the correct mountings, drive interface, oil and fuel line ports, and internal calibration are all designed to meet factory specifications. By selecting a pump with the exact OEM number 326-4635, you ensure compatibility, proper fuel system pressure behaviour, and a reliable rebuild or replacement path without risking improper fitment or sub-par performance.

Key Benefits
✅ OEM-Match Fitment: Designed to replace the factory unit exactly, ensuring correct mounting, drive alignment and fuel line interface.
✅ High-Strength Build: Engineered to withstand extreme pressures, rapid load changes and heavy-duty duty cycles typical of the C6.4 platform.
✅ Precise Fuel Delivery: Maintains correct pressure and timing to ensure optimal combustion, reduced emissions and smoother engine operation.
✅ Reduced Risk of Failures: Proper fitment and engineering help prevent issues like fuel leaks, pressure drops, or injector mis-behaviour.
✅ System Longevity: A quality high-pressure pump helps protect downstream components (injectors, sensors, rails) and supports the full fuel system’s durability.

Applications
This high-pressure fuel pump is intended for the Cummins C6.4 engine across its common-rail applications during model years 2014 through 2022. These engines are often found in construction equipment, off-highway applications, vocational vehicles and other heavy-use platforms where a durable, factory-matched fuel system is essential.

Installation Notes
Installation should be undertaken by a technician familiar with common-rail diesel systems. Begin by verifying the engine serial and compatibility with the OEM part number 326-4635. Relieve fuel system pressure and disconnect all fuel supply, return and oil lines as needed. Remove and inspect the old pump’s mounting and drive interface, checking for wear, contamination or lubrication issues. Clean all mating surfaces and ensure no debris remains. Install the new pump in the correct orientation, secure all bolts to manufacturer torque specifications, and reconnect fuel and oil lines carefully. After installation, bleed the system per engine manufacturer instructions, clear any diagnostic trouble codes, and run the engine through an initial break-in under light load. Monitor fuel pressure, system temperature and injector performance to confirm the pump is functioning correctly.

Final Thoughts
Fuel delivery is the foundation of engine performance, emissions and longevity. The Cummins C6.4 High-Pressure Fuel Pump (2014–2022, OEM 326-4635) provides a precisely engineered replacement that restores factory performance, protects your fuel system ecosystem and assures confident operation under demanding conditions.