original 20R-3477 Diesel Fuel Injector 10R-1290 10R-1275 250-1311 10R-1279 162-8813 0R-9944 for 3512B new injector original new injector

The 3512B Fuel Injector 20R-3477 is specifically engineered as a direct-fit replacement component for the 3512B engine platform and related 3512 series variants. Designed for seamless compatibility with 3512B HD, 3512B Marine, 3512B Generator, 3512B Offshore, and 3512B Power Module configurations, this injector is built to match the precise fuel system geometry and flow requirements of the 3512B engine family. Authorized OE numbers including 20R-3477, 10R-2106, 10R-2116, 328-9002, 330-0402, 249-0713, 387-9433, and 522-5638 confirm full interchangeability with genuine service specifications.

Manufactured to OEM-level standards, the 20R-3477 injector delivers precision fuel delivery, high pressure capability, and wear-resistant performance under continuous heavy-duty operation. Hardened steel construction, corrosion-resistant surface treatment, and enhanced multi-hole atomization ensure stable combustion, reduced carbon buildup, and consistent engine response across marine propulsion, offshore platform, mining, locomotive, and large-scale power generation applications.

Proper installation is critical to maximizing injector service life. The recommended procedure includes shutting down the engine and isolating the fuel supply, removing retaining hardware, extracting the existing injector, inspecting the bore and seating surface, installing a new sealing washer, torquing the new 20R-3477 injector to OEM specification, reconnecting fuel lines, bleeding the system, and verifying smooth operation. This engine-specific injector assembly provides a reliable, long-service-life solution tailored to the demanding operating conditions of 3512B industrial diesel applications.