original 105-1694 Diesel Engine Fuel Injector for 3116 Excavator 200B 320B 322B 325B 446B Mechanical Injector Nozzle Assembly Replacement for OEM original new injector

Purpose-built for continuous-duty diesel operation, this 3116 Mechanical Unit Injector carries primary OE reference 105-1694 and is fully interchangeable with alternative numbers 127-8218, 0R-8684, 317-4375, 0R-5191, 4P-2995, and 7E-8727. The assembly is engineered as a direct-fit fuel injection component for 3116 Naturally Aspirated, 3116 Turbocharged, 3116 Industrial, 3116 Marine, 3116 Generator, 3116 Power Unit, 3116TA, and 3116DITA engine configurations used across heavy industry.

Manufactured from heat-treated alloy steel, the injector body is machined to micron-level tolerances to ensure consistent fuel metering under sustained high-pressure conditions. An optimized nozzle geometry improves atomization and combustion efficiency, delivering better fuel economy, lower emissions, higher engine output, and extended service life. Protective surface treatment provides resistance to fuel contamination and moisture, supporting reliable performance in excavators, loaders, graders, fishing vessels, generator sets, mining trucks, agricultural tractors, industrial pumps, and compressor packages.

For installation, clean the injector bore, remove carbon deposits, fit a new sealing washer, lubricate the O-rings, seat the injector, torque to specification, bleed the fuel system, and verify leak-free operation. Recommended maintenance includes using clean diesel fuel, regular fuel filter replacement, avoiding water contamination, periodic inspection of fuel lines, monitoring smoke levels and fuel consumption trends, and injector bench testing during major engine service intervals.