Product Specifications:
Built to withstand the brutal conditions of heavy earthmoving and continuous industrial operation, the 0445120058 is an industrial-grade aftermarket Common Rail Diesel Fuel Injector perfectly matched for the highly dependable Cummins ISB/QSB 6.7L and Komatsu SAA6D107E-1 engines. Functioning as the core power delivery mechanism for heavy construction equipment like the Komatsu PC200-8 and PC220-8 excavators, this precision component strictly adheres to original factory flow dynamics. Upgrading to this unit instantly corrects poor fuel atomization, helping fleets restore crucial hydraulic breakout force while eliminating sluggish engine response under heavy loads. Fully engineered as a mechanical drop-in replacement that totally bypasses the need for complicated ECU programming, offering true plug-and-play functionality.
📊 Part Number Cross Reference
(Data verified via global catalog search – Extensive Interchangeability)
| Manufacturer Ref (Bosch Style) | Original Equipment (Cummins / Komatsu) |
| 0445120058 | 4976281 / 4939061 (Cummins) |
| 0986435508 / 0986435508 | 6745-11-3102 / 6745-11-3100 (Komatsu) |
🚛 Fits Applications (Engine & Vehicle)
(Verified application list)
| Make | Model / Application | Engine Size | Year | Engine Code & Specs |
| Komatsu | PC200-8, PC220-8, WA320-6 | 6.7L | Various | SAA6D107E-1, Tier 3 |
| Cummins | Industrial & Construction | 6.7L | 2007-Up | ISB 6.7, QSB 6.7, 24V |
👨🔧 Tech Notes & Installation Guide
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💰 Why Replace the Full Set?
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The Risk: Leaving degraded injectors in a 6-cylinder 6.7L engine alongside a single new unit guarantees erratic fuel rail pressure. This directly triggers severe engine knocking, sudden stalling under heavy digging loads, and dangerous hydraulic power loss.
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The Fix: We highly recommend taking advantage of our Volume Discounts to install a complete, synchronized set of 6 units. This restores perfectly balanced cylinder firing and factory-level excavating and towing capacity.
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✅ Direct Replacement (No Coding Required):
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Calibrated on advanced DCI test benches, this unit offers true plug-and-play installation with no IMA programming needed, instantly saving your field mechanics valuable repair downtime.
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⚠️ Critical Cleaning Step:
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High-pressure common rail systems on construction sites are incredibly sensitive to dirt and contamination. You absolutely must thoroughly flush the entire high-pressure fuel rail and lines prior to installation. Always equip a brand-new 5-micron fuel filter to protect the internal precision valves from microscopic debris.
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🔍 Explore More Heavy Duty Parts:
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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.
