Caterpillar C6.4 Common Rail Injector 326-4700 (10R-7675)

Restore 320D Precision: Caterpillar C6.4 Injector for Industrial Diesel Engine Parts

As a critical fuel system component within our wholesale Industrial Diesel Engine Parts catalog, this Caterpillar C6.4 Common Rail Injector (Part No: 326-4700) is engineered to meet the stringent emission and performance standards of the CAT C6.4 ACERT engine. We support diesel repair centers and fleet distributors with a high-precision fueling solution that ensures immediate throttle response and combustion efficiency for heavy-duty construction machinery.

The C6.4 engine, widely used in the 300-series excavators, is notoriously sensitive to fuel delivery irregularities. Our aftermarket injector addresses common failure modes such as control valve erosion and solenoid fatigue, which often lead to hard starting and white smoke. Whether you are troubleshooting a 320D Excavator or maintaining a forestry fleet, this unit serves as a direct-fit solution for OEM 326-4700 and Reman 10R-7675, delivering the reliability essential for commercial earthmoving operations.

326-4700 Injector Technical Specifications

Technician’s Note: Installation & Inspection

Technician’s Note: The Caterpillar C6.4 fuel system operates at extremely high pressures. When installing the 326-4700 injector, absolute cleanliness is mandatory; even microscopic dust can seize the control valve. Furthermore, you must replace the high-pressure fuel lines (quill tubes) whenever an injector is replaced, as the old tube tip will not seal properly against the new injector port, leading to fuel dilution in the oil.

Compatible Equipment for Caterpillar C6.4

Why Source Industrial Diesel Engine Parts from Ruich Value?

• Control Valve Hardness: Our control valve seats utilize high-grade hardened steel to resist erosion from high-pressure fuel return flow.
  Solves: Prevents the common “hard start” or “no start” hot condition caused by internal leakage.
• Precision Atomization: Nozzle tips are flow-matched to ensure a consistent spray pattern across all cylinders.
  Solves: Eliminates white smoke and rough idling issues associated with poor combustion.
• Solenoid Response: High-fidelity electromagnetic solenoids ensure rapid opening and closing times for precise injection timing.
  Solves: Restores lost engine power and throttle responsiveness in digging cycles.
• Fleet-Ready Inventory: We maintain a robust stock of 326-4700 injectors to support urgent breakdown requirements for 320D fleets.
  Solves: Reduces machine downtime costs in time-sensitive construction projects.
• Protective Packaging: Each injector is sealed in VCI plastic and boxed with tip protection caps.
  Solves: Prevents contamination and damage during transit to your warehouse.

Complete Caterpillar Fuel Injector Catalog

Our inventory extends far beyond the C6.4 series, covering a comprehensive range of Industrial Diesel Engine Parts for various fuel systems. We supply injectors for HEUI, EUI, and Common Rail applications.

Category coverage: Wholesale supply for Caterpillar 3126B, C7, C9, C10, C12, C13, and C15 engines.

View all specs in our Caterpillar Diesel Fuel Injector Catalog.

Or explore our complete Caterpillar Industrial Diesel Engine Parts Catalog

Technical FAQ: Caterpillar 326-4700 Injector

Q: Does this injector replace the 10R-7675 Reman number?

A: Yes. 10R-7675 is the Caterpillar Remanufactured part number for the original 326-4700. Our Ruich Value aftermarket injector is a 100% new unit that fully replaces both the 326-4700 and 10R-7675 without the need for a core return.

Q: Do I need to program trim codes for this aftermarket injector?

A: It depends on the specific production batch. Our injectors are manufactured to strict OEM tolerances to ensure a standardized flow rate. In many cases, they are “plug-and-play” ready, allowing the 320D ECU to adapt to the new injector through its self-learning cycle. However, if a specific trim code is provided on the injector body or test sheet, we recommend inputting it for immediate idle optimization.

Q: Is this injector compatible with the CAT 3126 engine?

A: No. The CAT 3126 uses a HEUI (Hydraulic Electronic Unit Injector) system, which is completely different from the Common Rail system used on the C6.4 (320D). They are not interchangeable. Please verify your engine model plate before ordering.

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We also supply control valves, nozzles, solenoids, and other repair kits for bulk fleet maintenance orders

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