Caterpillar original 127-8222 Fuel Injector Replacement for 127-8216 127-8213 107-7732 0R-8475 4P2995 0R-3580 Excavator 3116 3126 3114 Engine Parts original new injector

The Caterpillar CAT 3116 fuel injector 127-8222 is an OEM-type mechanical unit injector designed as an original replacement for the CAT 3116 diesel engine. It is also referenced for use in CAT 3114 and CAT 3126 engine platforms, provided that buyers verify compatibility by engine serial number, arrangement number, and the old injector number on the engine. The injector is engineered to deliver precisely atomized diesel fuel into the combustion chamber, supporting stable combustion, consistent engine power output, improved fuel efficiency, and reduced abnormal smoke when correctly installed and calibrated.

Built with heavy-duty construction for harsh operating environments, this injector provides precision fuel delivery and stable atomization across demanding duty cycles. It carries a wide cross-reference coverage, including numbers 107-1230, 0R-8461, OR8461, 4P-1731, 0R-3580, and CA1278222, making it easy to source for global aftermarket and fleet maintenance operations. The unit is suitable for CAT 322L, 325, and 325L excavators, CAT 950F, 950F II, and 960F wheel loaders, CAT 613C and 613C II wheel tractor scrapers, Challenger 35, 45, and 55 tractors, and combine models 460, 465, and 470 across construction, mining, agriculture, power generation, marine support, and industrial machinery applications.

For long service life, operators should use clean diesel fuel, replace the fuel filter regularly, drain the water separator as required, and keep the fuel tank clean. Routine inspection of the injector body for leakage, carbon buildup, and nozzle wear is recommended, and injectors should be replaced as a set when cylinder balance or atomization consistency must be restored. Unused injectors should be stored in clean, dry, sealed, anti-rust packaging until installation.