original 138-8754 Diesel Common Rail Fuel Injector for 3412E 3408E 3412 Engine 771D 769D 775D 773D Truck Excavator Auto Parts Replacement OEM original new injector

Engineered for demanding industrial diesel applications, the 138-8754 fuel injector delivers reliable, high-precision fuel atomization for 3412 series engines. Manufactured with industrial-grade materials and precision-machined components, this injector meets OEM tolerances and supports fleet operators, equipment rebuilders, and MRO buyers seeking a dependable direct-replacement solution. Authorized cross-reference numbers include 138-8754, 138-8754A, 138-8754B, and 138-8754C, ensuring accurate sourcing across global supply channels.

The injector features a precision-machined nozzle and plunger assembly for accurate fuel delivery, contributing to improved fuel efficiency, emission compliance, and long-term engine reliability. A high-resistance steel body with anti-corrosion coating provides heat resistance and vibration tolerance, making the unit suitable for heavy-duty service in bulldozers, excavators, loaders, mining trucks, drilling machines, marine engines, diesel generators, industrial power units, locomotives, and off-road vehicles. Compatibility with both OEM and aftermarket cross-reference numbers streamlines procurement for distributors serving construction, mining, marine, and power generation sectors worldwide.

For optimal service life, inspect the injector spray pattern every 500 hours, clean or replace fuel filters regularly, and monitor engine oil for contamination. Avoid low-quality fuel to prevent nozzle clogging, and recalibrate injectors after 2000 hours or per the engine service schedule. Recommended installation torque is 45–50 Nm, with an adjustable injector gap of 0.25 mm. OEM pressure and flow calibration is required for correct operation.