- EN
| Parameter | Specification |
|---|---|
| Product Name | Caterpillar Fuel Injector |
| COGENG Part Number | 557-7633 (5577633) |
| OEM Equivalent | Caterpillar 557-7633, 5577633 |
| Product Type | Common Rail Fuel Injector |
| Technology | Electronically controlled solenoid injector |
| Engine Compatibility | Caterpillar C9, C9.3 |
| Equipment Compatibility | CAT 330, 336D, 336D2, 336E, 336F, 340D, 345C, 345D excavators |
| Material | Iron + Rubber (seals: Viton / HNBR) |
| Packing | PP bag inside, carton box outside |
| Place of Origin | Guangdong, China |
| Brand Name | COGENG |
| Certification | ISO9001 |
| Supply Capacity | 500 PCS |
| Brand | Part Number |
|---|---|
| COGENG | 557-7633, 5577633 |
| Caterpillar | 557-7633, 5577633 |
| Interchange | 557-7634, 557-7635, 10R-4761, 10R-4762, 10R-4763, 10R-4764, 10R-4765, 10R-4766, 10R-4767, 10R-4768, 10R-4769, 10-4761, 10-4762, 10-4763, 10-4764, 10-4765, 10-4766, 10-4767, 10-4768, 10-4769 |
| Parameter | Specification |
|---|---|
| Engine Compatibility | Caterpillar C9, C9.3 (9.0L - 9.3L, 6-cylinder) |
| Displacement | 9.0L - 9.3L (549 - 567 cu in) |
| Cylinders | 6-cylinder engine |
| Injection System | High-pressure common rail (EUIM) |
| Control Type | Solenoid valve, electronically controlled by ECU |
| System Voltage | 24V DC (CAT standard) |
| Fuel Type | Diesel |
| Parameter | Specification |
|---|---|
| Injection Pressure | Up to 1,800 bar (26,000 psi) |
| Spray Pattern | Multi-hole nozzle optimized for C9/C9.3 combustion chamber |
| Flow Rate | OEM specification (±3% tolerance across set) |
| Response Time | ≤ 0.5 ms |
| Parameter | Specification |
|---|---|
| Body Material | High-strength hardened alloy steel |
| Nozzle Material | High-speed tool steel, precision ground |
| Solenoid Coil | Class H high-temperature insulation (180°C) |
| Internal Filter | Stainless steel screen (20-30 micron) |
| Seals | Viton (FKM) high-temperature resistant |
| Weight (each) | Approx. 0.8 - 1.2 kg (1.8 - 2.6 lbs) |
| Model | Series | Engine | Application |
|---|---|---|---|
| 330C | C-Series | C9 | Fuel injector |
| 330C L | C-Series | C9 | Fuel injector |
| 330D | D-Series | C9 | Fuel injector |
| 330D L | D-Series | C9 | Fuel injector |
| 336D | D-Series | C9 | Fuel injector |
| 336D L | D-Series | C9 | Fuel injector |
| 336D LN | D-Series | C9 | Fuel injector |
| 336D2 | D2-Series | C9 | Fuel injector |
| 336D2 L | D2-Series | C9 | Fuel injector |
| 336D2 XE | D2-Series | C9 | Fuel injector |
| 336E | E-Series | C9.3 | Fuel injector |
| 336E L | E-Series | C9.3 | Fuel injector |
| 336E LN | E-Series | C9.3 | Fuel injector |
| 336E LH | E-Series | C9.3 | Fuel injector |
| 336F | F-Series | C9.3 | Fuel injector |
| 336F L | F-Series | C9.3 | Fuel injector |
| 336F LN | F-Series | C9.3 | Fuel injector |
| 336F XE | F-Series | C9.3 | Fuel injector |
| 340D | D-Series | C9 | Fuel injector |
| 340D L | D-Series | C9 | Fuel injector |
| 345C | C-Series | C9/C11 | Fuel injector (C9 models) |
| 345D | D-Series | C9/C11 | Fuel injector (C9 models) |
| Engine Model | Displacement | Application |
|---|---|---|
| Caterpillar C9 | 9.0L (549 cu in) | Excavators, wheel loaders, industrial |
| Caterpillar C9 ACERT | 9.0L | Tier 3 / Stage IIIA compliant |
| Caterpillar C9.3 | 9.3L (567 cu in) | Excavators, wheel loaders |
| Caterpillar C9.3 ACERT | 9.3L | Tier 4 / Stage IV compliant |
Frequently Asked QuestionsNote: The 557-7633 injector is compatible with both C9 and C9.3 engine platforms . Verify compatibility with your equipment model, engine serial number, and ECU configuration before ordering. Contact COGENG with your machine details for exact application verification.
Q: What Caterpillar engines and equipment use the 557-7633 fuel injector?
A: The COGENG 557-7633 fuel injector is a direct OEM replacement designed for Caterpillar C7 and C9 diesel engines where this injector part number is specified. These engines power a wide range of Cat equipment including excavators (such as 329D, 330D, 336D series), off-highway trucks, wheel loaders, and other heavy machinery. Always verify this part number against your engine's parts manual or the original injector's identification markings to confirm exact compatibility before ordering.
Q: What are the symptoms of a failing fuel injector on a Cat C7 or C9 engine?
A: Common symptoms include engine misfire on one or more cylinders, rough idling or uneven engine operation, loss of power under load, increased fuel consumption, black or white smoke from the exhaust, hard starting, fuel dilution in the engine oil, active diagnostic trouble codes related to injector circuits, or the engine entering a derate or limp mode. Faulty injectors can lead to internal engine damage if not addressed promptly, making timely replacement essential.
Q: Is this injector a direct plug-and-play replacement?
A: The COGENG 557-7633 fuel injector is manufactured to exact OEM specifications for nozzle geometry, spray pattern, fuel delivery rate, electrical connector type, and mounting dimensions. It is a direct physical replacement requiring no modifications when installed on compatible Cat C7 or C9 engines. However, injector trim codes must be programmed into the engine ECM using Caterpillar Electronic Technician (Cat ET) after installation to ensure proper fuel delivery calibration.
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