Product Specifications:
Engineered to dominate in extreme earthmoving and continuous commercial hauling environments, the 0445120231 is a premium aftermarket Common Rail Fuel Injector. Precision-calibrated for the highly utilized Cummins QSB / ISB series and Komatsu 4D107 / 6D107 diesel engines (the robust powerplants driving the legendary PC200-8 and PC220-8 excavators as well as commercial trucks), this component aggressively cures rough engine idling, excessive exhaust smoke, and sudden power loss under peak hydraulic loads. By leveraging advanced internal flow dynamics and premium high-pressure nozzle metallurgy, it ensures a true plug-and-play installation. Fleet managers and heavy equipment technicians can entirely bypass costly dealership ECU software diagnostics, instantly restoring optimal fuel atomization and maximized breakout torque to keep high-stakes construction and transport projects strictly on schedule.
📊 Part Number Cross Reference
(Data verified via global catalog search – Extensive Interchangeability)
| Manufacturer Ref (Bosch Style) | Original Equipment (Komatsu / Cummins) |
| 0445120231 | 6754-11-3010 / 6754-11-3011 |
| 0445120059 / 0986435597 | 6754-11-3012 / 4945969 / 3976372 |
🚛 Fits Applications (Engine & Vehicle)
(Verified application list)
| Make | Model / Application | Engine Size | Year | Engine Code & Specs |
| Komatsu | PC200-8 Excavator | 4.5 L | Various | QSB4.5 / 4D107 (4-Cyl) |
| Komatsu | PC220-8 Excavator | 6.7 L | Various | QSB6.7 / 6D107 (6-Cyl) |
| Cummins | Various Commercial Trucks | Various | Various | ISB / QSB Series |
👨🔧 Tech Notes & Installation Guide (FAQ)
Q: Why should I replace the full set of 4 or 6 injectors on my QSB4.5 / QSB6.7 engine?
A: Operating heavy excavators or commercial trucks with a failing injector causes massive common rail pressure drops and severe cylinder washing. This directly results in violent engine stalling under heavy digging or cargo payloads, increased exhaust emissions, and a critical loss of earthmoving power. We highly recommend utilizing our Volume Discounts to install a fully synchronized set of 4 or 6 units (depending on your 4D107 or 6D107 block) to ensure perfectly matched cylinder firing and restore maximum factory torque.
Q: Does the 0445120231 injector require IMA coding?
A: No. This unit is strictly calibrated on advanced DCI test benches to perfectly match official OEM nominal flow data. Because its physical delivery quantities are tightly controlled within standard factory tolerances, your excavator’s ECU will utilize its built-in self-adaptive learning (fuel trim) to automatically synchronize the injection. You get a true plug-and-play installation without needing manual dealer trim code entry.
Q: What is the critical cleaning step before installation?
A: Construction and earthmoving environments expose fuel systems to extreme dust and abrasive contaminants. You must thoroughly flush the entire high-pressure fuel rail system and install brand-new OEM-spec 5-micron fuel filters before cranking the engine to prevent immediate internal valve scoring and firmly protect your warranty.
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⚖️ Legal Disclaimer
Part numbers, OE numbers, and brand names mentioned above are for reference and identification purposes only. This product is a compatible aftermarket replacement part and is NOT manufactured, sponsored, or affiliated with the original equipment manufacturers.
