OEM spec common rail injector for CAT 320D and 323D excavators. Flow-tested to restore C6.4 performance (OEM 326-4700). OEM quality wholesale rates
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The Ruich Value 326-4700 is an OEM-spec common rail fuel injector expertly calibrated for the Caterpillar C6.4 6.4L engine. Designed for high-pressure precision, it restores factory fuel atomization in CAT 320D and 323D excavators, eliminating rough idling. OEM quality wholesale rates available.
In the mid-size earthmoving sector, the Caterpillar C6.4 ACERT engine relies on exceptional fuel delivery to sustain its high-torque output. As a direct replacement for the Caterpillar 326-4700 injector, our assemblies are engineered to manage the intense pressures of the Denso common rail system architecture utilized by CAT. For fleet managers and independent workshops handling a 320D excavator injector replacement, installing a unit with verified flow characteristics is the only way to guarantee optimal combustion and Euro-compliant emissions in heavy construction environments.
The 6.4L ACERT diesel engine is highly sensitive to fuel impurities. Microscopic debris passing through degraded fuel filters causes severe common rail control valve wear. This internal erosion prevents the injector from holding rail pressure, ultimately causing C6.4 hard start diagnostics to point directly at injector failure. Symptoms typically include extended cranking when the engine is warm, heavy exhaust smoke, and severe power loss under load. Our precision-manufactured injectors utilize hardened internal valving to resist this abrasive wear and restore rapid starting.
Sourcing through a trusted wholesale CAT injector provider eliminates the prohibitive downtime and markup associated with dealership networks. Every CAT C6.4 common rail injector we supply undergoes comprehensive multi-point dynamic testing to ensure OEM spec flow calibration across idle, emission, and full-load states. Whether your facility is executing a complete excavator engine rebuild or performing routine maintenance on a 323D fuel injector replacement, our factory-direct distribution provides the reliability required for continuous hydraulic duty.
| Parameter | Technical Value |
|---|---|
| Primary OEM Number | 326-4700 / 3264700 |
| Reman Reference | 10R-7675 |
| Engine Compatibility | Caterpillar C6.4 ACERT (6.4L Inline-6) |
| System Type | High-Pressure Common Rail (HPCR) |
| Actuation Mechanism | Electronic Solenoid Valve |
| ECU Calibration | Unique Trim Code Required |
| Fuel Mapping | Multi-Injection Event Compatible |
Our diesel fuel injection catalog extensively covers the Caterpillar ACERT engine family, spanning from the C4.2 and C6.4 up to heavy-duty C15 common rail systems. Explore our complete Caterpillar Categories for additional high-pressure pumps, control valves, and precision engine rebuild components.
| Premium OEM | Cro. Ref. P/N / Reman | Application Engine | System Type | Application Vehicle |
|---|---|---|---|---|
| 326-4700 | 10R-7675 | Caterpillar C6.4 | Common Rail (Denso) | CAT 320D, 323D Excavators |
| 320-4740 | 10R-7676 | Caterpillar C4.2 | Common Rail (Denso) | CAT 315D, 318D, 319D Excavators |
| 2645A749 | 320-0690 | Perkins 1106C; CAT C6.6 | Common Rail (Denso) | JCB JS200; CAT 924H, 938H Loaders |
| 2645A747 | 320-0680 | Perkins 1106D; CAT C6.6 | Common Rail (Denso) | CAT 120M Grader; Industrial Gensets |
| 2645A753 | 321-3600 | Perkins 1106D; CAT C6.6 | Common Rail (Denso) | Caterpillar 428E Backhoe Loader |
| 387-9427 | 10R-4761, 263-8218 | Caterpillar C7 ACERT | HEUI (Hydraulic) | CAT 324D, 325D, 329D, 950H |
| 387-9433 | 10R-7224, 254-4399 | Caterpillar C9 ACERT | HEUI (Hydraulic) | CAT 330D, 336D Excavators |
| 371-3974 | 0445120347 | Caterpillar C9 | Common Rail (Bosch) | CAT 336E (Newer Series), Loaders |
| 10R-7222 | 0445110126 | Caterpillar C7 / C7.1 | Common Rail (Bosch) | CAT 320E, 323E, Industrial Apps |
| 4W-7018 | / | Caterpillar 3406, 3408 | Mechanical (Pencil) | CAT D8K, D9, Trucks (Mechanical) |
| 8N-7005 | / | Caterpillar 3304, 3306 | Mechanical (Pencil) | CAT D6D Dozer, 966C Loader, 12G |
| 127-8216 | / | Caterpillar 3116 | Mechanical (MUI) | CAT 320B, 322B, 325B Excavators |
| 127-8222 | / | Caterpillar 3116 | Mechanical (MUI) | CAT 950F, 960F Loaders |
| Make | Machine Model | Year Range | Engine | Application |
|---|---|---|---|---|
| Caterpillar | 320D / 320D L / 320D GC | 2006–2015 | CAT C6.4 | Track Excavator |
| Caterpillar | 321D LCR | 2007–2014 | CAT C6.4 | Compact Radius Excavator |
| Caterpillar | 323D L / 323D LN / 323D SA | 2006–2015 | CAT C6.4 | Track Excavator |
| Caterpillar | M322D Wheel Excavator | 2008–2015 | CAT C6.4 | Material Handling |
Answer: Yes. The 326-4700 is the standard new production OEM number used during assembly for the CAT C6.4 engine. The 10R-7675 is the official Caterpillar Remanufactured (Reman) part number for the exact same unit. Our high-precision replacements are fully interchangeable with both of these numbers, requiring no modifications to the fuel rail or electrical harness.
Answer: Common rail injectors operate at extreme pressures (often exceeding 26,000 PSI). Due to microscopic manufacturing tolerances, each injector delivers a slightly different fuel volume at a given electronic pulse. The factory tests each unit and generates a Trim Code (QR code/alphanumeric string). Using a diagnostic scanner (like CAT ET) to input this injector trim code tells the ECM exactly how to adjust the firing pulse, preventing cylinder imbalance and engine knocking.
Diagnosis: When the internal control valve wears down, it allows pressurized fuel to escape back into the fuel return line rather than being injected into the cylinder. The primary symptom is a “hard start” when the engine is warm (because hot, thin fuel leaks past the worn valve faster). Other symptoms include a noticeable lack of power under load and the ECM throwing low fuel rail pressure fault codes.
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For Fuel Injector: Spare parts available – Nozzle, plunger, repair kits. Part number required for final confirmation.
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