Caterpillar original  317-5279 Diesel Fuel Injector for CAT C12 C7 C10 C11 C13 Engine Excavator Parts Replacement for OEM original new injector

Built around the authorized Caterpillar OE number 317-5279, this common rail diesel fuel injector is engineered as a direct replacement component for CAT C12 and CAT C10 engines used across heavy-duty on-highway and off-highway equipment. It controls fuel delivery, meters the correct fuel quantity, atomizes fuel through the injector nozzle, and supports accurate injection timing to improve combustion efficiency while helping reduce smoke. The injector is widely cross-referenced with additional authorized numbers including 229-5918, 212-3462, 10R-0961, 10R-0963, 10R-1258, 0R-4987, 0R-9530, 161-1785, 166-0149, 203-3464, 212-3469, 223-5328, 10R-1003, 10R-1814, and FS10R1814, simplifying global part identification for procurement teams and service shops handling mixed Caterpillar engine fleets.

Designed for OEM-style fitment, the assembly features heavy-duty construction, precision-machined internal components, and stable fuel atomization to protect the engine from over-fueling, poor atomization, rough idle, hard starting, and fuel-related cylinder damage. Each unit is remanufactured or built to reman-style specifications and professionally tested for flow rate, leakage, spray pattern, solenoid response, and overall injector performance. During engine overhaul, cylinder head repair, or fuel system service, technicians are advised to inspect the injectors, check injector balance, measure return flow, replace fuel filters, drain the water separator, and verify injector balance against the engine serial number.

Common failure symptoms addressed by this replacement injector include hard starting, rough idle, black smoke, white smoke, engine knock, power loss, high fuel consumption, fuel dilution in oil, cylinder misfire, and excessive exhaust temperature. Possible root causes include injector leakage, worn nozzle, poor atomization, low fuel pressure, clogged fuel filter, fuel contamination, wrong injector number, and incorrect installation. Suitable applications span heavy-duty trucks, construction machinery, excavators, loaders, bulldozers, road machines, diesel generator sets, mining equipment, quarry machines, off-road diesel equipment, marine auxiliary engines, and industrial diesel power units, subject to confirmation against the original injector part number, engine serial number, and fuel system configuration before ordering.