Caterpillar original Caterpillar 317-5278 Diesel Engine Fuel Injector for C11 C13 Excavator Parts 212-3463 212-3462 new injector original new injector

The CAT C13 diesel fuel injector 317-5278 is an OE-style replacement component engineered for Caterpillar fuel injection systems used across heavy-duty industrial machinery. Designed to match the original equipment specification, this injector delivers precise fuel metering, fine atomization, and stable combustion to maintain balanced cylinder performance across demanding duty cycles. The heavy-duty construction ensures dependable operation under the high-pressure and high-temperature environments typical of construction, mining, and road-building sites.

This injector is applicable to Caterpillar C10, C11, C12, C13, and 3176C diesel engines, with the C13 engine serving as the primary target platform. It is commonly fitted on motor graders 14H, 140H, 143H, 160H, and 163H, wheel loader 966G II, pipelayer 572R II, tractor D7R II, and related earthmoving and compacting equipment. The cross reference coverage of CA3175278, 3176C, and 23670-E0510 supports flexible replacement options for fleet maintenance and rebuild operations.

To preserve injector performance and service life, operators should use clean diesel fuel, replace fuel filters on schedule, drain the water separator regularly, and keep the fuel tank free of contamination. Common diagnostic indicators include hard starting, rough idle, black or white smoke, reduced power, high fuel consumption, engine knock, misfire, and elevated exhaust temperature. Routine inspection, fuel pressure testing, cylinder cut-out testing, and ECM fault code verification are recommended to confirm injector condition prior to replacement.