Caterpillar original Fuel Injector 266-4387 for 150-4453, Replacement for OEM 20R-1264, 162-8813, for CAT C3500 3508 3512 3516 Construction Machinery 5130B 5230B original new injector

The original Caterpillar 266-4387 diesel fuel injector is a high-precision component built for the CAT 3500 Series heavy-duty engine platform. It is fully compatible with CAT 3508, 3508B, 3508C, 3512, 3512B, 3512C, 3516, 3516B, 3516C, 3524 and 3524B diesel engines, and supports cross-referencing with verified OEM, remanufactured and alternative part numbers. It is a standard component sourced through Caterpillar’s global supply chain for engine rebuild facilities, diesel system specialists and aftermarket replacement programs.

Regulated by the engine control module (ECM), the injector receives pressurized diesel and delivers precisely metered fuel at optimal timing based on real-time engine speed, load, fuel demand and operating temperature. Its precision nozzle atomizes fuel into microscopic droplets to enable stable, efficient combustion, supporting improved power output, reduced emissions, lower fuel consumption and consistent engine operation. Made from high-strength alloy steel to OEM standards, it offers high pressure capability, temperature and corrosion resistance, and an extended service life.

This industrial-grade injector is validated for demanding sectors including mining, marine propulsion, power generation, oil and gas, industrial power and construction, fitting equipment such as generator sets, mining trucks, drilling platforms and commercial marine vessels. It follows Caterpillar’s official installation specifications, and only requires routine maintenance including clean diesel fuel, regular filter changes and periodic performance checks to retain reliable long-term operation.