Caterpillar original Caterpillar 155-1819 1551819 Diesel Engine Fuel Injector for 3412E 3126B 3512B 5110B new injector original new injector

The Caterpillar 155-1819 fuel injector is a precision-engineered direct injection component designed for CAT 3412, 3412E, 3126B, and 3512B diesel engines. Built to deliver accurately metered fuel into the combustion chamber at high pressure, it ensures optimal atomization for efficient combustion, stable engine timing, and consistent spray pattern performance across heavy-duty operating cycles. Each unit is precision-machined to tight tolerances, incorporating a high-pressure nozzle, plunger and barrel assembly, control valve, seals, and calibrated orifices, all manufactured to meet relevant ISO quality standards and offered in both OEM and high-quality aftermarket configurations.

Designed to perform reliably in high-temperature, high-vibration environments, the 155-1819 injector is suited for generators, excavators, construction machinery, industrial power units, marine vessels, and mining or oil field prime movers. Authorized cross-reference numbers include 20R-4148, 4CR01974, 198-4752, 0R-9350, 222-5967, 232-1175, 171-9704, and 232-1173, providing flexible compatibility across CAT engine platforms. Operators should verify the exact engine serial range before ordering, as injector calibration may vary between applications.

Proper installation by a certified diesel technician following Caterpillar service manual torque specifications is required, along with correct calibration and sequencing within the engine control system. Routine inspection during major service intervals, use of clean high-quality diesel fuel, regular filter replacement, and periodic test-bench calibration or cleaning will help maintain injector performance and extend service life in demanding industrial and marine applications.