Product Specifications:
The 1830691 is a heavy-duty, precision-engineered HEUI Fuel Injector (Hydraulically Actuated Electronically Controlled Unit Injector – Aftermarket Replacement) designed specifically for Caterpillar 3126 and 3126B 6-cylinder diesel engines. These robust powerplants are widely utilized in heavy construction equipment, including 320C, 322C, and 325C series excavators. Manufactured to verify against rigorous OEM testing protocols to ensure optimal fuel atomization and factory-level horsepower.
📊 Part Number Cross Reference
(Data strictly verified via OEM catalogs – Do NOT mix with 177-4754/10R-0782)
| Brand (Ref Only) | Part Number |
| Caterpillar (Ref) | 183-0691 / 1830691 |
| Interchange Numbers | 178-6342, 128-6601, 188-1320, 196-4229 |
| Reman Part Number | 10R-1257, 0R-9348, 0R-9350 |
🚛 Fits Applications (Engine & Vehicle)
(Verified application list)
| Make | Machine / Model | Engine Code |
| Caterpillar | Excavator: 322C, 325C, 320C | 3126 / 3126B |
| Caterpillar | Wheel Loader: 938G II, 950G, 962G | 3126 / 3126B |
| Caterpillar | Motor Grader / Track Loader | 3126 / 3126B |
👨🔧 Tech Notes & Installation Guide
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💰 Why Replace the Full Set?
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The Risk: Mixing a brand-new HEUI injector with old, worn units on your 6-cylinder 3126 engine causes uneven fuel delivery. This leads to Cylinder Power Imbalance (Engine Vibration, Drivetrain Stress, and Heavy Exhaust Smoke).
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The Fix: Take advantage of our Volume Discounts to install a matched set of 6 units. This ensures uniform injection pressure and restores smooth factory performance.
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✅ Verification & Calibration:
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IMPORTANT: This injector replaces Reman numbers 10R-1257 / 0R-9348. It is structurally similar but functionally DIFFERENT from 10R-0782 (177-4754). Please verify your Engine Serial Number (ESN) or the part number stamped on your old injector before installation.
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⚠️ Critical Cleaning Step:
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HEUI Warning: This system uses high-pressure engine oil to actuate fuel injection. You MUST change the engine oil, install a new oil filter, and flush the entire fuel system with a new fuel filter prior to installation.
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🔍 Explore More Heavy Duty Parts:
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Looking for more options? Browse our complete selection of Fuel Injectors.
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Keep your engine running smoothly with our premium Engine Components.
⚖️ Legal Disclaimer
Part numbers, OE numbers, and brand names (e.g., Caterpillar, CAT) 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.
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