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

The Perkins 155-1819 is a precision-engineered diesel fuel injector designed for Perkins 3412, 3412E, 3126B, and 3512B diesel engines. It is also referenced under cross numbers 20R-4148, 4CR01974, 198-4752, 0R-9350, 222-5967, 232-1175, 171-9704, and 232-1173, making it a versatile direct-fit replacement for fleet operators and maintenance workshops servicing heavy-duty equipment.

This injector is built to deliver accurately metered fuel into the combustion chamber under high pressure, producing a fine atomized spray pattern essential for efficient combustion. Its core components—including the high-pressure nozzle, plunger and barrel assembly, control valve, and precision seals—are machined to tight tolerances to maintain consistent timing, flow rates, and spray geometry. Engineered to withstand high temperatures and persistent vibration, it reliably performs in demanding industrial, marine, generator, and construction environments.

Proper installation by a certified diesel technician is required, with torque and calibration carried out per the Perkins service manual. Routine inspection during major engine servicing, regular fuel filter replacement, and the use of clean diesel are recommended to maximize service life. Both OEM and high-quality aftermarket options are available, with warranty terms typically ranging from 6 to 12 months depending on the supplier.