Caterpillar original Diesel Fuel Injector 20R-0849 Replacement, cross reference 20R-1272, 376-0509, 392-0208 for construction machinery engines original new injector

The 20R-0849 fuel injector assembly is a heavy-duty industrial injection component engineered for Caterpillar 3500 Series diesel platforms under continuous-duty operation. It is compatible with CAT 3408, 3412, 3512, 3512B, 3512C, 3516, 3516B, and 3516C engine families, serving generator sets, mining trucks, marine vessels, oilfield equipment, industrial pumps, compressors, construction machinery, power plants, data centers, and emergency backup power systems. Meeting stringent Caterpillar fuel system requirements, it delivers precise fuel metering, optimized atomization, improved combustion efficiency, enhanced fuel economy, and reduced emissions.

Sourcing flexibility is a further advantage. The 20R-0849 is cross-referenced under multiple Caterpillar OE, Reman, and service exchange numbers, including 20R0849, 247-9784, 2479784, 326-1640, 3261640, 10R-0957, 10R0957, 0R-8477, 0R-8479, 212-3464, and 2123464. These references appear across Caterpillar dealer inventory systems, diesel fuel injection catalogs, engine overhaul databases, remanufacturing programs, and aftermarket sourcing platforms, allowing buyers to verify interchangeability and consolidate part numbers with confidence.

In operation, the injector manages fuel pressurization, calibrated metering, atomization, and combustion, supporting stable engine performance and extended engine longevity. Installation should follow Caterpillar torque specifications, using verified injector and engine serial numbers, new sealing components, and clean fuel lines. Common failure symptoms—hard starting, white or black smoke, power loss, rough idle, cylinder misfire, high fuel consumption, and elevated exhaust temperatures—support fast field diagnosis. Supply coverage spans North America, South America, Europe, the Middle East, Africa, and Asia Pacific.