Caterpillar original 6I-3075 6I3075 0R8680 Common Rail Diesel Fuel Injector for 3516 3500A Engine 777B 785 789 Excavator Replacement new original new injector

The CAT 3512A Fuel Injector 6I-3075 is an OEM equivalent diesel fuel injector assembly designed for Caterpillar 3500 series engines, including the 3512A, 3512, and 3516 models. It is engineered to deliver OEM equivalent flow calibration with a precision-machined nozzle, ensuring consistent cylinder-to-cylinder balance and high-pressure diesel compatibility. This injector meets the demanding requirements of generator sets, marine propulsion systems, mining trucks, oilfield power units, and heavy construction equipment.

Built with corrosion-resistant construction and a leak-resistant sealing system, the 6I-3075 injector provides long operational life and stable engine performance across industrial and marine applications. The precision nozzle design improves atomization, resulting in increased engine efficiency, enhanced fuel economy, and lower emissions. This fuel injector serves as a direct replacement for cross reference numbers 0R-8680, OR-8680, 2815-01-430-3140, 7C-9795, and 7C-4184, offering a dependable solution for maintaining Caterpillar engine reliability.

Proper installation requires shutting down the engine, relieving fuel pressure, removing the old injector, cleaning the injector bore, and tightening to Caterpillar service specifications. Operators are advised to use clean diesel fuel, replace filters regularly, monitor injector performance, and follow OEM maintenance schedules to minimize downtime. Common diagnostic indicators include black smoke from nozzle wear, white smoke from fuel dribble or poor atomization, and power loss from restricted nozzles or internal wear. The 6I-3075 injector addresses all these concerns, reducing maintenance costs and ensuring dependable performance.