Caterpillar original Diesel Engine Fuel Injector 1OR-2977 Replacement for OEM 249-0708 Cross Reference 249-0712, for heavy duty diesel engine application, 332-1419 for C13 original new injector

For B2B stakeholders including diesel component distributors, fleet maintenance teams and engine rebuild workshops, the CAT 10R-2977 is a heavy-duty remanufactured diesel fuel injector purpose-built for Caterpillar C-series engine platforms. As a core part of the diesel fuel injection system, it receives pressurized fuel and delivers a precisely metered charge into the combustion chamber at calibrated timing. Regulated by the engine control module using real-time data on speed, load, temperature and pressure, it supports stable atomization, consistent combustion and reliable performance under sustained high-load operation.

The injector is primarily specified for Caterpillar C13 12.5L inline six-cylinder diesel engines, and is also widely listed for C11 applications, with 6 injectors required for a complete engine set. It fits a broad portfolio of Caterpillar-powered equipment: heavy-duty trucks, construction machinery, mining support gear, generator sets, industrial power units, marine auxiliary engines, and agricultural and forestry machinery. Verified cross references include 249-0708, 2490708, EX632977 and 632977, while "1OR-2977" is a common search variant caused by visual confusion between the number 0 and letter O.

To prevent compatibility errors, buyers must confirm fitment by cross-checking the old injector part number, engine serial number, engine arrangement number and equipment model before ordering, as identical equipment models may carry different engine ratings, emission configurations or injector calibrations. Manufactured to match original Caterpillar performance specifications, this injector delivers a dependable, cost-effective replacement solution for scheduled maintenance and full engine overhauls.