original 10R-1262 HEUI Diesel Fuel Injector for 3126 3126B 3126E C7 Truck Engine Replacement for OEM 222-5963 222-5965 222-5966 222-5967 original new injector

Engineered for demanding HEUI service, this remanufactured hydraulic actuated diesel fuel injector is built as an OE-style replacement for 10R-1262 and 10R1262 applications on 3126, 3126B, and 3126E diesel engines. It carries broad cross-number coverage including 222-5963, 203-3771, 204-6714, EX631262, CA10R1262, CA2225963, CA2033771, and CA2046714, making it a practical choice for professional diesel repair shops, fleet maintenance companies, engine rebuilders, and aftermarket export distributors seeking dependable HEUI replacement inventory.

The injector operates within the Hydraulic Electronic Unit Injection system, using high-pressure engine oil for hydraulic actuation while the ECM controls injection timing and fuel delivery. The remanufactured design supports improved power output, cleaner fuel atomization, stable idle quality, and more efficient combustion. It is commonly supplied for core-exchange programs and used across medium duty trucks, construction machinery, agricultural equipment, and industrial diesel engines throughout North American, Latin American, Middle Eastern, African, Southeast Asian, and European rebuild markets.

Correct fitment should be verified by engine serial number, original injector part number, and application configuration. Recommended service practices include clean fuel and oil, correct filtration intervals, water separator draining, harness inspection, ECM code scanning, O-ring and seal replacement, proper torque procedures, system priming, and post-installation cylinder contribution testing. Following these procedures helps address hard starting, rough idle, smoke, misfire, power loss, and high fuel consumption caused by injector wear or contamination.