Caterpillar original Replacement Fuel Injector 0R-1745 4W-7018 for 3406 3408 3406B 3412 Diesel Pencil Injector Nozzle, Cross Reference 4W-7019, Excavator Application, 0R-3422 original new injector

Built for demanding fuel-system service, the CAT 0R-1745 fuel injector nozzle is a brand-new, OEM-equivalent industrial-grade component for heavy-duty diesel applications. Manufactured from hardened alloy steel with a precision-ground needle valve and micron-level machining, it is designed to meet OEM dimensional and performance specifications. The heavy-duty design emphasizes high wear resistance, stable atomization and long service life. Cross references include 0R1745, 4W-7018 and 4W7018.

The nozzle is compatible with Caterpillar 3406, 3406B, 3406C, 3408, 3408B, 3408C, 3412 and 3412C engines. Its application coverage extends to excavators, bulldozers, wheel loaders, mining and haul trucks, drilling and oilfield equipment, generator sets, marine engines, work boats and industrial engines. This broad fitment supports injector rebuilding and repair, engine overhauls, preventive maintenance and industrial fleet maintenance across construction, mining, marine, oilfield, transportation and power-generation operations.

During operation, high-pressure fuel lifts the needle valve at the calibrated opening pressure and passes through precision-machined nozzle holes, producing fine atomization for mixing with compressed air. The resulting spray control supports precise fuel metering, efficient combustion, reliable power output and reduced fuel consumption, exhaust smoke and carbon deposits. For dependable service, use clean diesel fuel, replace filters at specified service intervals, renew sealing washers and O-rings during installation, verify calibration, inspect for leaks and follow Caterpillar service-manual procedures.