original 180-7431 Diesel Injector Repair Kit 222-5966 135-5459 178-6342 174-7528 20R-0759 177-4753 for 3126 Series Engine new injector original new injector

Engineered specifically as a direct-fit replacement for the 3126 engine family, the 180-7431 fuel injector delivers OEM-level metering accuracy and combustion efficiency. Its electronic unit injector architecture integrates precisely with the engine control module of the 3126, 3126B, 3126E, and selected C7 platforms, maintaining original injection timing, pressure characteristics, and fuel delivery profiles. This injector is fully interchangeable with cross reference numbers 10R-0781, 10R0781, 0R-8479, and 0R8479, allowing seamless substitution during scheduled overhauls or field service. The assembly is installed in the cylinder head position and is validated for heavy duty trucks, commercial buses, generator sets, construction machinery, marine propulsion units, agricultural equipment, and industrial power applications powered by the 3126 series.

The injector is built around a precision-machined nozzle and high-strength alloy steel internal components, finished to OEM tolerance standards to ensure stable fuel delivery, optimized spray atomization, and consistent cylinder-to-cylinder performance. Its corrosion-resistant construction supports compatibility with Ultra Low Sulfur Diesel (ULSD) fuel, extending service life under demanding operational conditions. Advanced electronic control compatibility preserves accurate injector response signals, which is essential for maintaining emissions compliance and fuel economy on 3126B and 3126E applications. Each unit is produced under strict dimensional and performance controls so that the replacement injector matches the flow rate and response characteristics of the original 180-7431 component.

Proper installation requires a clean environment, inspection of the injector bore, replacement of sealing components where applicable, and strict adherence to torque specifications for the 3126 cylinder head. Following installation, electronic connectors must be verified and post-installation engine diagnostics performed to confirm correct operation. Routine maintenance, including the use of high-quality diesel fuel, regular fuel filter replacement, prevention of water contamination, periodic injector testing, and following maintenance schedules, will help sustain reliable performance. When diagnostic procedures such as reading ECM fault codes, checking fuel pressure, performing cylinder cut-out tests, conducting injector balance tests, and inspecting nozzle condition indicate injector wear, the 180-7431 provides a dependable OEM-aligned solution for restoring the performance of 3126 series engines.