Caterpillar original Fuel Injector Nozzles, for heavy duty diesel engine application, Cross Reference 0R-4124 4W-7017 4W-7019, 130-1804, Replacement for OEM, Excavator Parts original new injector

Built for demanding diesel fuel systems, the CAT 130-1804 fuel injector nozzle is a brand-new, OEM-equivalent component designed for direct replacement in Caterpillar-powered equipment. Made from high-strength alloy steel with precision heat treatment, it offers wear resistance, corrosion protection, thermal stability, and long service life. Applications include construction, mining, agriculture, marine, and power generation equipment, from excavators and bulldozers to generator sets and industrial machinery.

Within the injection system, the nozzle receives high-pressure diesel fuel and atomizes it into fine droplets through precision-machined orifices. When pressure reaches the designed threshold, the needle lifts from its seat, producing a controlled spray angle and uniform fuel distribution in the combustion chamber. Efficient fuel-air mixing supports complete combustion, improved engine performance, and power output while helping reduce fuel waste, exhaust smoke, carbon formation, and emissions. Advanced CNC machining and optimized spray geometry further support precise fuel delivery and high-pressure operation.

The nozzle is commonly associated with CAT C13, C15, C18, 3406E, 3456, C27, C32, 3412, 3508, and 3512 engines, depending on equipment configuration and regional specifications. Related identification numbers include 1301804, 10R-1804, 10R1804, and 130-1804C. Its durable construction, direct-replacement installation, and broad application coverage make it a practical choice for diesel fuel-system maintenance across heavy equipment fleets.