Caterpillar original 20R-3477 Diesel Common Rail Fuel Injector 375-4106 20R-3483 359-5469 for Perkins 3512C 3516C Engine 5130B 5230B new original new injector

The CAT 3512B Fuel Injector 20R-3477 is engineered as a precision fuel delivery component for heavy-duty Caterpillar diesel engine platforms. Each injector is flow-tested to verify accurate fuel quantity metering and is built to meet the demanding operating pressures of large-displacement industrial diesel engines. Manufactured from hardened alloy steel with a corrosion-resistant surface treatment, this injector is designed to perform reliably in harsh environments including offshore platforms, mining operations, and continuous-duty generator sets.

This injector assembly incorporates enhanced atomization technology that improves spray characteristics and combustion efficiency. It is a direct replacement for the 10R-2106, 10R-2116, 328-9002, 330-0402, 249-0713, 387-9433, and 522-5638, ensuring broad compatibility across the CAT 3512B engine family and related CAT 3512 industrial, marine, and petroleum engine configurations. The component supports stable engine operation by reducing vibration, refining idle quality, and strengthening load response under variable duty cycles.

Suitable for marine propulsion, mining, oil and gas, locomotive, and large-scale power generation applications, the 20R-3477 injector assembly is intended for continuous operation in the most demanding industrial conditions. Operators are encouraged to follow the recommended preventive maintenance schedule and consult the injector failure diagnosis database to maximize service life. Each unit is produced according to Caterpillar fuel system performance standards, delivering OEM-level reliability for critical engine systems.