Perkins original Perkins original Perkins 317-5278 Diesel Engine Fuel Injector 10R-0960 20R-0055 153-7923 212-3462 212-3463 Replacement for Perkins C10 C12 Excavator new original new injector

The 317-5278 diesel fuel injector is engineered for Perkins C10, C12, C11, C13, 3176C, and 3196 engines widely used in heavy construction equipment. It carries the primary OE number 317-5278 and cross-references 3175278, CA3175278, 20R-0055, and 10R-1264, making it a direct replacement option for service shops and parts distributors. The injector delivers precise fuel metering and controlled atomization to support stable combustion, strong torque output, and efficient fuel use across demanding duty cycles such as road construction, quarry, mining, and pipeline operations. Built with heavy-duty internal components and reliable sealing, it is designed to handle the high injection pressures of modern Perkins electronic unit injector systems. For installation, confirming the engine serial number, arrangement number, and old injector part number is strongly recommended to ensure proper fitment.

This injector is commonly applied to Perkins motor graders including the 14H, 140H, 143H, 160H, and 163H, as well as the 814F wheel dozer, 815F and 816F compactors, 966G II wheel loader, 572R II pipelayer, and D7R II tractor. Its broad equipment coverage makes it suitable for engine rebuild programs, fleet maintenance operations, and global aftermarket distribution channels. Routine maintenance practices — including clean diesel supply, timely fuel filter replacement, water separator draining, and careful handling of nozzle and sealing surfaces — help maximize injector service life. For high-hour engines, replacing the complete injector set can restore cylinder balance, reduce exhaust smoke, and improve cold-start performance.

Common failure symptoms associated with worn or damaged injectors include hard starting, rough idle, black or white smoke, elevated fuel consumption, low power, diesel knock, misfire, fuel dilution in engine oil, and abnormal exhaust odor. Diagnostic procedures such as fuel pressure testing, leak-off testing, cylinder cutout testing, injector balance testing, and ECM scanning can confirm whether the injector is the root cause. Before installation, inspect the injector bore, replace all sealing components, and follow the official Perkins service manual for torque specifications. After installation, bleed the fuel system, verify idle quality, and check whether ECM calibration or injector trim input is required for optimal engine performance.