Caterpillar original 0R-8684 Diesel Fuel Injector, Replacement for OEM 127-8218 107-7735 156-5023, Fits CHALLENGER 35 45 55 Truck 3116 3126 Engine original new injector
Product Details
Caterpillar diesel fuel injector replacement
,OEM 127-8218 fuel injector for CHALLENGER
,3116 3126 engine fuel injector
Caterpillar original 0R-8684 Diesel Fuel Injector, Replacement for OEM 127-8218 107-7735 156-5023, Fits CHALLENGER 35 45 55 Truck 3116 3126 Engine original new injector
Fuel Type | Diesel |
Condition | New |
Applicable Engine | Caterpillar 3116, Caterpillar 3126, Caterpillar Industrial Diesel Engines, Caterpillar Generator Engines, Caterpillar Power Units |
Injector Type | High Pressure Fuel Injector Assembly |
Quality Standard | OEM Specification |
Packaging | Standard Industrial Export Packaging |
Fuel System | High Pressure Diesel Fuel Injection System |
OE Number | 0R-8684 |
Brand | CAT |
Cross Number / Universal Number | 0R-8684, 0R8684, OR8684, 127-8218, 1278218, 107-7734, 1077734, 4P-2995, 4P2995 |
Vehicle / Equipment Application | Construction Equipment, Mining Equipment, Forestry Equipment, Industrial Engines, Diesel Generators, Power Generation Systems, Wheel Loaders, Logging Equipment, Industrial Generators, Construction Machinery, Agricultural Equipment, Diesel Power Units, Excavators, Backhoe Loaders, Earthmoving Equipment, Haul Equipment, Harvesters, Feller Bunchers, Skidders, Prime Power Generators, Standby Generators, Emergency Power Systems, Auxiliary Marine Engines, Generator Engines, Workboat Equipment |
Application Type | OEM & Aftermarket Replacement |
Engineered for Caterpillar 3116 and 3126 diesel platforms, the CAT 0R-8684 fuel injector assembly delivers consistent high-pressure fuel metering aligned with factory specifications, supporting stable combustion across demanding industrial duty cycles. Its precision-machined nozzle produces an optimized spray pattern that promotes complete fuel atomization, lowering smoke density, reducing carbon accumulation, and contributing to improved overall combustion efficiency.
Manufactured from hardened alloy steel components, this injector is built to withstand the thermal and mechanical stress found in heavy construction, mining, forestry, and power generation applications. The high-temperature-resistant construction ensures long-term reliability in harsh operating environments, while the precision internal components help increase torque output, lower fuel consumption, and reduce exhaust emissions. Enhanced cold-start performance further supports dependable operation in variable climate and load conditions.
Prior to installation, operators should verify the correct part number, confirm engine model compatibility, and clean the fuel system and injector seat to ensure proper seating and performance. Routine maintenance includes inspecting fuel filters every 250 hours, replacing filters every 500 hours, inspecting injectors every 1000 hours, testing injector performance every 2000 hours, and completing a full fuel system overhaul every 4000 hours.
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