Fuel injector 320-0680 for Caterpillar C6.6 6.6L engines. Fits 323D excavators and 928H loaders. Cross-reference Perkins 2645A747. Bulk orders welcome
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The Ruich Value 320-0680 is a premium common rail fuel injector specifically engineered for the Caterpillar C6.6 6.6L diesel engine. Fully interchangeable with Perkins 2645A747, it resolves hard hot starts and fits CAT 323D excavators and 928H loaders. Bulk orders welcome for fleet supply.
In modern mid-sized earthmoving equipment, the 6.6L common rail diesel platform provides the perfect balance of torque and emission compliance. The Caterpillar 320-0680 injector is the core fuel delivery component for this engine, ensuring high-pressure atomization. Because Caterpillar and Perkins share engine architectures in this displacement class, the CAT C6.6 is virtually identical to the Perkins 1106D series. Consequently, our CAT C6.6 fuel injector serves as a direct drop-in replacement for the Perkins 2645A747 injector, allowing fleet managers to service mixed fleets with a single, highly reliable component.
High-pressure common rail (HPCR) systems are extremely sensitive to fuel contamination. Microscopic debris bypassing fuel filters leads to severe common rail control valve erosion. When the internal control valve wears out, the injector bleeds off rail pressure back into the fuel return line. This results in the notorious C6.6 hard hot start condition, where the engine cranks excessively when warm, accompanied by injector stiction misfire and rough idling. Upgrading to our precision-manufactured assemblies prevents this pressure loss, restoring rapid startup and balanced cylinder firing.
As a premier source for wholesale Caterpillar injector replacements, Ruich Value guarantees that every unit is dynamically flow-tested across multiple load states on specialized test benches. Whether you need a 323D excavator injector or a replacement for a 928H loader injector, our factory-direct assemblies include the required factory Trim Codes. This ensures seamless integration with the engine control module (ECM) for any heavy equipment injector replacement program across the globe.
| Parameter | Technical Value |
|---|---|
| Primary OEM Number | 320-0680 / 3200680 |
| Perkins Cross-Reference | 2645A747 |
| Engine Compatibility | CAT C6.6 / Perkins 1106D (6.6L) |
| Fuel System Type | High-Pressure Common Rail (HPCR) |
| Actuation Mechanism | Electronic Solenoid Valve |
| ECU Calibration | Unique Trim Code Required |
| Reman Reference | 10R-7675 |
Our extensive common rail diesel catalog covers the complete C-Series and Perkins engine families. Explore our complete Caterpillar Categories for additional HEUI and CR injectors, high-pressure fuel pumps, and complete engine rebuild parts.
| 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 | 323D / 323D L / 323D SA | 2007–2015 | CAT C6.6 | Track Excavator |
| Caterpillar | 924H / 928H / 930H | 2007–2014 | CAT C6.6 | Wheel Loader |
| Caterpillar | M316D / M318D / M322D | 2006–2015 | CAT C6.6 | Wheel Excavator |
| Perkins | 1106D-E66TA Industrial | 2006–Present | Perkins 1106D | Generators / Pumps |
Yes, they are identical. The Caterpillar C6.6 and Perkins 1106D are sister engines built on the same architectural platform. Caterpillar uses the 320-0680 part number in their SIS network for earthmoving equipment, while Perkins uses 2645A747 for their industrial and agricultural applications. Our replacement injector is fully interchangeable between both systems.
Diagnosis: A hard hot start—where the engine cranks excessively when warm but starts fine when cold—is a classic sign of common rail control valve failure. When engine heat thins the diesel fuel, worn internal valves inside the injector allow the high-pressure fuel to bypass and return to the tank. Solution: The fuel rail cannot build the required pressure (typically 4000+ PSI) to trigger the ECU to fire the injectors. Replacing the faulty injectors with our precisely machined units restores the hydraulic seal and eliminates the hot start issue.
Answer: Due to microscopic variations in manufacturing, no two common rail injectors flow exactly the same amount of fuel. The factory tests each unit and generates a unique alphanumeric “Trim Code” that describes its specific flow characteristics. Solution: Using Caterpillar ET or a compatible diagnostic scanner, you must program this injector trim code into the Engine Control Module (ECM) upon installation. This allows the ECM to adjust the electrical pulse width, ensuring balanced cylinder power and preventing engine knock.
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For Fuel Injector: Spare parts available – Nozzle, plunger, repair kits. Part number required for final confirmation.
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