Perkins original  Common Rail Diesel Injector for C7 C9 Excavator Engine 241-3238 241-3239 241-3400 243-4502 10R-4761 233-3536 295-1408 328-2583 222-5959 original new injector

The Perkins C7 fuel injector 222-5961 is a heavy-duty HEUI diesel injector engineered for the Perkins C7 and C7 7.2L engine family used in medium-duty trucks, buses, construction machinery, excavators, loaders, and diesel generator sets. The injector receives diesel fuel from the supply circuit and uses high-pressure engine oil delivered by the HEUI actuation system to generate the injection pressure required for efficient combustion. An engine control module activates the injector solenoid to regulate injection timing and fuel quantity, ensuring precise fuel metering and accurate atomization through the nozzle into the combustion chamber.

This injector is built to original equipment specifications, delivering reliable performance for both new replacement and remanufactured applications. The unit is widely cross-referenced across the Perkins and Caterpillar part number families, including 10R4761, 10R-4761, 10R4761R, 222-5959, 233-3536, 236-0973, 241-3238, 243-4502, 293-1408, 295-1408, 328-2583, 387-9430, 20R8057, and Delphi EX634761, simplifying inventory management for distributors, fleet operators, and engine rebuilders. The injector is supplied individually or as a complete set of six, with reman suppliers typically operating a core return program.

Proper maintenance of the Perkins C7 HEUI system requires clean diesel fuel, scheduled fuel filter replacement, correct engine oil quality, regular oil filter changes, and routine draining of water separators. Because HEUI actuation depends on engine oil pressure, contaminated oil, low oil pressure, or poor oil quality can directly affect injector response. Periodic ECM diagnostics, cylinder balance tests, and fuel pressure checks are recommended to identify injector issues before they escalate into major engine damage.