original Fuel Injector 0R-4124 7W-7038 170-5187 1705187 for 3306 3306B Engine D6H D6D D6R D6G2 D6H XR 140H 143H 160H Tractor Construction Machinery Marine original new injector

Engineered as a direct OEM-quality replacement, the 0R-4124 Diesel Fuel Injector Nozzle Assembly delivers reliable atomization and consistent metering for demanding industrial diesel applications. Cross-referenced with 7W-4124, 3I-4124, 1R-4124, and 9W-4124, this component is a plug-in solution for 3126, C7, C9, 3116, and 3208 engine platforms, supporting fleets across construction, mining, marine, power generation, agriculture, and oil and gas sectors.

Manufactured through advanced CNC machining and precision grinding, the 0R-4124 nozzle features high-strength alloy steel construction with heat treatment and precision surface finishing for superior resistance to wear, corrosion, erosion, and thermal fatigue. Optimized nozzle geometry ensures a stable spray pattern, enhancing combustion efficiency, reducing particulate emissions, and improving overall fuel economy. Every unit is produced to strict OEM specifications, guaranteeing dimensional accuracy and drop-in compatibility with hydraulic excavators, wheel loaders, bulldozers, motor graders, articulated dump trucks, generator sets, and marine propulsion units.

To maximize service life, operators should use high-quality diesel fuel, replace fuel filters on schedule, avoid water contamination, and monitor exhaust conditions. Installation requires thorough cleaning of the injector bore, new sealing washers, correct torque application, and system bleeding followed by leak inspection. For diagnostics, verify opening pressure for hard starting, inspect nozzle holes for misfires, and check spray patterns when power loss occurs.