original Diesel Engine Fuel Injector 317-5278 for C11 C13 Excavator Replacement  original new injector

The 317-5278 diesel fuel injector is engineered as an OE-style replacement for C10, C11, C12, C13, and 3176C diesel engines, with the C13 platform as the primary target. It is designed to deliver precise fuel metering and fine atomization, supporting stable combustion, balanced cylinder output, and consistent engine performance across demanding operating cycles. Authorized OE reference numbers include 317-5278, CA3175278, 3176C, and 23670-E0510, enabling straightforward part identification, cross-referencing, and stock management for distributors and service operations.

This injector is purpose-built for heavy equipment commonly fitted with the C13 family of engines, including motor graders 14H, 140H, 143H, 160H, and 163H, wheel dozer 814F, compactors 815F and 816F, wheel loader 966G II, pipelayer 572R II, and tractor D7R II. It is widely used in construction, mining, road-building, earthmoving, and material-handling machinery where the C13 engine platform dominates. The OE-specification construction ensures direct fitment and reliable integration with the common rail fuel system, supporting efficient fuel delivery under high-load conditions.

To maximize service life, operators should use clean diesel fuel, replace fuel filters on schedule, drain the water separator regularly, and keep the fuel tank free from contamination. Periodic inspection of injector performance is recommended when symptoms such as hard starting, rough idle, black or white smoke, low power, high fuel consumption, engine knock, misfire, fuel dilution in engine oil, elevated exhaust temperature, or external fuel leakage are observed. Fuel pressure testing, cylinder cut-out testing, and ECM fault code reading are advised for accurate diagnosis. Injectors should remain in sealed packaging until installation, and should not be disassembled or subjected to impact prior to fitting.