Product Specifications:
Designed for the grueling demands of heavy earthmoving and severe construction environments, the 0445120231 is a rugged aftermarket Common Rail Diesel Fuel Injector. Precision-engineered for the highly dependable Cummins ISB/QSB and Komatsu 4D107/6D107 series engines (powering popular PC200-8 and PC220-8 excavators), this heavy-duty unit flawlessly restores factory-level fuel delivery and consistent rail pressure under extreme stress. Featuring pre-calibrated flow data for exact ECU matching, it guarantees a true plug-and-play installation, enabling your heavy machinery to bypass expensive dealership diagnostics and instantly recover its maximum hydraulic trenching breakout force.
📊 Part Number Cross Reference
(Data verified via global catalog search – Extensive Interchangeability)
| Manufacturer Ref (Bosch Style) | Original Equipment (Cummins / Komatsu) |
| 0445120231 | 6754-11-3010 / 6754-11-3011 / 6754-11-3012 |
| 0445120059 / 0986435597 | 3976372 / 397637D / 4945969 / 5263262 |
🚛 Fits Applications (Engine & Vehicle)
(Verified application list)
| Make | Model / Application | Engine Size | Year | Engine Code & Specs |
| Cummins | Commercial Trucks & Industrial | 4.5 / 6.7 d | Various | ISB, QSB |
| Komatsu | Excavators (PC200-8, PC220-8) | 4.5 / 6.7 d | Various | QSB4.5 (4D107), QSB6.7 (6D107) |
👨🔧 Tech Notes & Installation Guide
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💰 Why Replace the Full Set?
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The Risk: Operating a hard-working Komatsu excavator or Cummins commercial truck with a degraded injector creates extreme fuel rail pressure drops. This directly leads to violent hydraulic stalling under heavy digging loads (憋车), excessive fuel waste, and rapid DPF soot accumulation that will trigger sudden, unexpected machine downtime on the job site.
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The Fix: We strongly recommend leveraging our Volume Discounts to purchase a completely synchronized set of 4 or 6 units (depending on your specific QSB4.5 or QSB6.7 engine block). This ensures perfect combustion balance, returning your heavy equipment to a smooth, robust idle and safely recovering its peak operational lifting capacity.
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✅ Direct Replacement (No Coding Required):
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Pre-calibrated to exact factory tolerances on advanced DCI test benches, this component delivers true plug-and-play functionality. It requires absolutely no complex IMA coding, entirely bypassing expensive diagnostic software and drastically slashing your mechanic’s repair downtime.
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⚠️ Critical Cleaning Step:
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Construction site fuel tanks naturally accumulate abrasive dust and mud over time. You must thoroughly flush the entire high-pressure fuel rail and equip a brand-new OE-quality 5-micron fuel filter before startup; failure to do so guarantees immediate contamination damage and will strictly void the 30-day manufacturing defect policy.
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🔍 Explore More Heavy Duty Parts:
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Looking for more options? Browse our complete selection of Fuel Injectors & Pumps.
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Keep your fleet running smoothly with our premium Engine Components.
⚖️ 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.
