original 155-1819 Replacement for OEM Fuel Injector Compatible with 3412E 3126B 3512B 5110B new injector original new injector

The 155-1819 fuel injector is specifically engineered for direct fitment on 3412 and 3412E series diesel engines, with verified cross-compatibility across 3126B and 3512B power units used in industrial, marine, mobile, and power generation applications. Because injector calibration varies across different engine serial ranges, confirmation of the exact engine serial before ordering is essential to ensure correct metering and spray pattern. This injector carries authorized OE reference 155-1819 along with 20R-4148, 4CR01974, 198-4752, 0R-9350, 222-5967, 232-1175, 171-9704, and 232-1173, allowing seamless specification matching during service and replacement cycles.

Internally, the 155-1819 assembly integrates a high-pressure nozzle, plunger and barrel set, and precision-machined seals, all produced to tight tolerances that withstand elevated combustion temperatures and sustained vibration loads typical of heavy-duty operation. The injector delivers atomized fuel at the precise pressure and timing required by the 3412 combustion cycle, supporting stable idle, clean acceleration, and consistent load response. In HEUI or MEUI electronic configurations, the control valve function interfaces with the engine management calibration to maintain correct injection events across the full RPM range.

Routine maintenance should be performed during major engine servicing intervals, including inspection of seals, injector tips, and high-pressure components, regular replacement of fuel filters, and periodic test-bench calibration or cleaning. Installation must be completed by a certified diesel technician following the service manual torque specifications and proper injector sequencing within the engine control system. OEM and high-quality aftermarket supply options are available, typically backed by a 6–12 month supplier warranty and shipped in original or OEM-equal protective packaging.