Caterpillar original  20R-1267 Diesel Engine Common Rail Fuel Injector 392-0203 386-1766 High Pressure Nozzle Replacement for CAT 994D new original new injector

The Caterpillar CAT 3512B Fuel Injector 20R-1267 is a precision-engineered OEM diesel fuel injector designed to deliver consistent atomization, stable injection pressure, and reliable combustion across demanding industrial environments. Built specifically for the CAT 3512B diesel platform, this injector assembly is widely used in power generation sets, marine propulsion and auxiliary systems, heavy-load mining equipment, oil and gas drilling rigs, and industrial backup power units where dependable fuel delivery is essential. The injector is manufactured to OEM calibration standards, ensuring proper fit, spray pattern, and flow rate compatible with the original engine performance parameters of the CAT 3512B series.

This fuel injector features a precision-machined nozzle for efficient fuel atomization, hardened internal components for long service life under high-pressure operation, and corrosion-resistant materials that withstand the harsh conditions commonly found in marine, mining, and field-installed generator applications. Each unit is tested for industrial performance to confirm stable delivery and high pressure resistance, supporting reliable cold starts, smooth idling, and consistent power output across the full operating range of the 3512B engine.

The 20R-1267 injector is compatible with multiple cross reference numbers including 392-0203, 10R-1276, 0R-9796, OR-9796, 229-0202, 250-1303, 386-1755, and 172-4677, giving fleet operators and maintenance teams a flexible replacement option for engine rebuilds, scheduled overhauls, and field service. To maintain optimal injector performance, operators should follow recommended service intervals including fuel filter replacement every 250 hours, fuel system inspection every 500 hours, and injector performance and pressure testing every 1,000 hours, with a full bench test every 2,000 hours. This injector provides a dependable solution for keeping CAT 3512B powered equipment running efficiently in generator, marine, and mining operations.