Product Specifications: Engineered specifically for the brutal environments of open-pit mining and heavy earthmoving, the 4P9076 is a heavy-duty aftermarket Mechanical Unit Fuel Injector. Precision-crafted for the massive CAT 3500 Series mobile engines (powering legendary machines like the D11N track-type tractors, 777B/785/789 off-highway trucks, and 994 wheel loaders), this component rapidly cures severe power loss, heavy exhaust smoke, and dangerous stalling under extreme payloads. Built to endure constant high-torque demands, it features exact OEM mechanical tolerances for a guaranteed plug-and-play installation. Mining fleet managers can bypass dealership programming bottlenecks, instantly recovering peak hauling performance and engine reliability to keep critical extraction operations moving.
📊 Part Number Cross Reference
(Data verified via global catalog search – Extensive Interchangeability)
| Manufacturer Ref (Bosch Style) | Original Equipment (CAT) |
| 4P9076 | 4P-9076 / 7E-3382 |
| 0R2921 / 0R-2921 | 7E3382 |
🚛 Fits Applications (Engine & Vehicle)
(Verified application list)
| Make | Model / Application | Engine Size | Year | Engine Code & Specs |
| CAT | D11N Track-Type Tractor | 3508 | Various | 3508 Mobile Engine |
| CAT | 777B, 785, 789 Off-Highway Trucks | 3508/3512/3516 | Various | 3500 Series Mobile |
| CAT | 994 Wheel Loader | 3516 | Various | 3516 Mobile Engine |
👨🔧 Tech Notes & Installation Guide (FAQ)
Q: Why should I replace the full set of 8, 12, or 16 injectors on my CAT 3500 Series engine?A: Operating heavy mining equipment with a failing unit injector causes massive uneven fuel delivery and cylinder washing. This directly results in violent engine vibration under heavy earthmoving loads, increased emissions, and a severe loss of hauling power. We highly recommend utilizing our Volume Discounts to install a completely synchronized set of 8, 12, or 16 units (depending on your specific 3508, 3512, or 3516 block) to guarantee perfectly matched cylinder firing and restore maximum operational torque.
Q: Does the 4P9076 injector require IMA coding?A: No, this heavy-duty mechanical unit injector is built for direct drop-in installation. It operates purely on precise mechanical tolerances and requires zero complex ECU programming or dealer calibration. It provides a true plug-and-play solution, significantly reducing critical downtime for your mining fleet.
Q: What is the critical cleaning step before installation?A: Mining and earthmoving environments expose fuel systems to extreme dust and abrasive contaminants. You must thoroughly flush all high-pressure fuel lines and install brand-new OEM-specification fuel filters prior to engine startup to prevent immediate nozzle scoring and firmly protect your warranty.
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⚖️ Legal DisclaimerPart 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.









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