Caterpillar original Common Rail Diesel Fuel Injectors 20R-1277 392-0216 Replacement for OEM 392-0200, 392-0215 for Caterpillar C3500 3508 3512 3516 Marine Construction Machinery original new injector

The Caterpillar (CAT) 20R-1277 Fuel Injector Assembly is a genuine OEM-standard diesel fuel injection component engineered for Caterpillar 3500 Series heavy-duty engine platforms, with verified compatibility across 3508, 3512, 3512B, 3512C, 3516 and 3516B models. Manufactured to meet original Caterpillar calibration specifications, it serves as a validated direct replacement for cross-reference part numbers 20R1277, 10R-1277, 10R1277, 10R-0957 and 10R0957, integrating seamlessly with compatible fuel systems without modification.

As a precision fuel metering device, the 20R-1277 injector delivers the exact required fuel volume into the combustion chamber at calibrated timing and pressure to enable efficient, complete combustion. High-pressure fuel accumulates in its chamber until the preset pressure threshold is reached, when the injector needle lifts to atomize fuel through precision nozzle holes before closing immediately after the injection event. This design delivers accurate fuel metering, improved combustion efficiency, lower fuel consumption, reduced exhaust smoke, stable power output and extended engine service life.

Built with wear-resistant components and a heavy-duty industrial design, the injector supports critical use cases including generator sets, marine engines, mining equipment, oilfield equipment, offshore platforms, pump stations, industrial plants and emergency backup power systems. It comes with a 12-month warranty. Caterpillar recommends following official service manual procedures during installation, conducting routine fuel system maintenance, and verifying compatibility via engine serial number and original injector part number before ordering.