original 20R-1277 Diesel Engine Fuel Injector 20R-1264 20R-1280 20R-1278 20R-1276 for 3508 3512 3516 Series new injector original new injector

The 20R-1277 fuel injector assembly is engineered as a direct OEM replacement for the 3512B diesel engine, covering the full V12 platform with 58.6L displacement, turbocharged architecture, and direct fuel injection. Verified cross references include 20R1277, 10R-1277, 10R1277, 10R-0957, and 10R0957, ensuring accurate matching for the 3512, 3512C, 3516, 3516B, and 3508 series used in generator sets, marine propulsion engines, mining equipment, and oilfield power units.

Manufactured to OEM calibration standards, the injector delivers precise fuel metering, superior atomization efficiency, and stable injection pressure under continuous heavy-duty operation. Wear-resistant internal components and a heavy-duty industrial design maintain consistent spray patterns, improving combustion quality, lowering fuel consumption, reducing exhaust smoke, and supporting stable power output across demanding load cycles in industrial power generation and marine applications.

For reliable service life, use high-quality diesel fuel, replace fuel filters regularly, drain water separators, and monitor fuel pressure and contamination levels. During installation, use OEM sealing components, replace copper washers, observe a clean working environment, follow the service manual, and verify fuel pressure after installation. Recommended diagnostic actions include injector bench testing, fuel pressure testing, nozzle inspection, leak inspection, and injector replacement when symptoms indicate failure.