Caterpillar original C9.3 Series Engine 20R-5079 456-3545 Common Rail Fuel Injector 364-8024 for Excavator Construction Machinery Replacement for OEM 456-3579 original new injector

The Caterpillar 456-3545 is a precision-manufactured high-pressure common rail diesel fuel injector engineered exclusively for CAT C9.3 series diesel engines, covering C9.3 ACERT, C9.3B, industrial-grade and power-generation C9.3 variants. It fits a broad portfolio of Caterpillar heavy-duty equipment, ranging from 336, 340 and 349 series excavators, M-series wheel loaders and motor graders to industrial power units, generator sets and marine auxiliary engines. It supports core sectors including construction, mining, industrial operation and power generation.

Built with hardened alloy steel and OEM-calibrated injection parameters, this injector delivers precise fuel atomization and accurate injection timing controlled by the engine ECU. Its optimized spray pattern and high-pressure fuel delivery capability improve combustion efficiency, boost power output, reduce fuel consumption and cut exhaust emissions. Wear-resistant and corrosion-resistant components ensure stable fuel flow performance even in extreme heavy-duty working environments, supporting consistent engine emission compliance.

Manufactured under ISO manufacturing standards, the 456-3545 injector is available in new OEM or OEM-equivalent condition to match diverse procurement requirements. It is recommended to replace injector seals, ensure contamination-free installation and complete injector coding during fitting per official Caterpillar service manual specifications. Routine maintenance including regular fuel filter replacement and frequent water separator draining can effectively extend injector service life and reduce unplanned equipment downtime.