original High Pressure Fuel Injector Cross Reference 177-4754, Primary Part 155-1819, Replacement for OEM Parts, Compatible with C7 7.2L Engines for Construction Machinery original new injector

Engineered for the erpillar 3126 Series diesel platform, the 155-1819 fuel injector is an electronic unit injector manufactured to OEM specifiions. It delivers accurate fuel metering and high-pressure atomization, supporting efficient combustion, stable power output, reduced emissions, and extended service life. Built from hardened alloy steel and 100% performance tested before shipment, every unit is backed by a 12-month warranty and available in new or remanufactured condition to suit different maintenance budgets.
Broad compatibility makes this injector a practical choice for fleet maintenance and industrial procurement. It fits 3126, 3126B, and 3126E engines in marine, industrial, and generator configurations, powering 315, 317, and 318 excavators, IT28G wheel loaders, generator sets, industrial power units, and heavy duty trucks. The part cross-references 157-3727, 173-1012, 173-4566, 173-9379, 188-1320, 222-5965, 145-9360, 0R-9348 (OR9348), and EX639348, simplifying sourcing across OEM, remanufactured, and exchange channels.
In operation, the injector receives electronically controlled delivery commands, pressurizes fuel internally, and lifts the nozzle needle via solenoid activation, producing a finely atomized spray for complete fuel-air mixing. The result is improved fuel economy, easier cold starts, lower noise, and reduced consumption. For service teams, symptoms such as excessive smoke, hard starting, unstable idle, engine vibration, or rising fuel consumption indie inspection is due. Routine care—clean diesel, regular fuel filter replacement, and periodic line checks—helps preserve injection performance across construction, power generation, marine, mining, and agricultural duty cycles.