Product Specifications:
The 3190677 is a heavy-duty, precision-engineered Hydraulic Unit Injection Pump (HEUI Actuation Pump) (Aftermarket Replacement) designed specifically for Caterpillar C7 and C9 diesel engines. Acting as the heart of the HEUI fuel system, this pump generates the extreme hydraulic oil pressure required to actuate the unit injectors. These robust engines are widely utilized in heavy earthmoving equipment, including the popular 324D, 325D, 330D, and 336D series excavators, as well as various H-Series wheel loaders. Manufactured to verify against rigorous OEM testing protocols to restore proper actuation pressure, eliminate hard starts, and ensure maximum horsepower.
📊 Part Number Cross Reference
(Data verified via global catalog search)
| Brand (Ref Only) | Part Number |
| Caterpillar (Ref) | 319-0677 / 3190677 |
| Reman Part Number | 10R-8899 / 10R8899 |
| Alternative Replacements | 10R-3134, 10R-3144, 254-4357, 295-4777 |
🚛 Fits Applications (Engine & Vehicle)
(Verified application list)
| Make | Machine / Model | Engine Code |
| Caterpillar | Excavator: 324D, 325D, 328D LCR, 329D, 330D, 336D, 340D L | C7 / C9 |
| Caterpillar | Wheel Loader: 950H, 962H | C7 / C9 |
| Caterpillar | Asphalt Paver: AP-1055D, BG-2455D | C7 / C9 |
| Caterpillar | Integrated Toolcarrier / Forwarder: IT62H, 584 | C7 / C9 |
👨🔧 Tech Notes & Installation Guide
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✅ Fix Low Actuation Pressure & Hard Starts:
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The Problem: A worn HEUI actuation pump cannot generate the required hydraulic pressure to fire the injectors. This results in extended cranking times, stalling, check engine light codes, and significant power loss under load.
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The Fix: Install this brand-new injection pump to restore factory hydraulic pressure parameters. (Note: Only 1 pump is required per engine).
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✅ Direct Replacement Installation:
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This pump is precisely calibrated on the test bench to match OEM flow and pressure standards. Ensure proper gear timing alignment during installation according to the manufacturer’s service manual.
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⚠️ Critical System Flush Warning (HEUI):
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EXTREME DANGER: If your original pump suffered internal mechanical failure, it almost certainly sent metal shavings through the high-pressure oil lines directly into your injectors. You MUST thoroughly flush the oil system, change the engine oil and filters, and inspect the injectors prior to startup. Failure to clean the system will instantly destroy the new pump and your injectors.
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🔍 Explore More Heavy Duty Parts:
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Looking for more options? Browse our complete selection of Diesel Pumps.
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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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