original 10R-0961 C12 Diesel Fuel Injector Assembly 212-3462 212-3463 212-3468 10R-1264 10R-0967 for Excavator 365B L new injector original new original new injector

Engineered as a direct engine-matched replacement, the C10 C12 high pressure diesel injector 10R-0961 is calibrated specifically for C10, C12, 3176C and 3196 engine families. The injector follows the original equipment geometry, nozzle geometry and internal flow characteristics, ensuring that fuel delivery, injection timing and spray pattern remain consistent with the engine calibration. This makes the unit suitable for fleets and rebuild shops that require a drop-in fit without additional reprogramming of the ECM. The remanufactured assembly is designed to withstand the demanding duty cycles of heavy-duty trucks, vocational equipment, mining machinery, generator sets and marine auxiliary engines powered by these engine families.
Internally, the 10R-0961 injector features precision-machined plungers with wear-resistant coatings, tight-tolerance nozzle needle valves, and durable high-pressure seals that maintain stable injection pressure throughout the service interval. Each unit is tested for opening pressure, spray pattern, back-leakage and flow rate before release. The injector is designed to operate reliably on modern low-sulfur and low-lubricity diesel fuels, supporting cleaner combustion and reduced internal wear. Six-cylinder set availability is offered to support full engine overhauls where consistent injector performance across all cylinders is essential, and core return program support helps workshops manage replacement costs.
Routine maintenance of the 10R-0961 injector includes regular fuel filter replacement, water separator drainage, periodic fuel tank cleaning when contamination is found, injector balance testing, ECM fault code review, and leak inspection. When symptoms such as hard starting, rough idle, engine misfire, black or white smoke, low power, high fuel consumption, diesel knock or cylinder imbalance appear, fuel pressure testing, return flow testing, and cylinder cutout testing are recommended to identify the faulty cylinder. For engines undergoing full rebuild, replacing the complete set of injectors is recommended to restore balanced fuel delivery and protect the remanufactured engine.