Product Specification

original 105-1694 Construction Machinery Injector for 3116 200B 325B Excavator 0R-8475 127-8207 Cross Reference Replacement for OEM new original new injector

Engineered specifically for the 3116 engine platform, the 105-1694 mechanical unit injector delivers precise fuel metering across the full operating range of the 3116 Naturally Aspirated, Turbocharged, Industrial, Marine, Generator, Power Unit, 3116TA, and 3116DITA configurations. The injector body is produced from heat-treated alloy steel, with internal components machined to micron-level tolerances to ensure consistent injection pressure and repeatable fuel delivery in heavy-duty applications. Its optimized nozzle geometry supports fine fuel atomization, contributing to cleaner combustion, lower fuel consumption, and reduced exhaust emissions under continuous industrial load conditions. A protective surface treatment shields critical internal surfaces from fuel contamination and moisture-related corrosion, extending service intervals in harsh environments such as construction sites, marine engine rooms, and prime power generator installations. The injector is validated against OEM durability benchmarks for sustained operation in demanding duty cycles including excavators, wheel loaders, motor graders, generator sets, marine propulsion and auxiliary engines, agricultural tractors and harvesters, and oilfield power equipment. Authorized cross-reference coverage includes 127-8218, 0R-8684, 317-4375, 0R-5191, 4P-2995, and 7E-8727, allowing simplified inventory management for fleet operators and distributors servicing mixed 3116 fleets. The assembly integrates directly into the mechanical fuel system without electronic control modifications, preserving original engine calibration and simplifying field replacement. Each unit is engineered to maintain stable injection timing, supporting reliable cold starting, smooth idle quality, and full-load response across the 3116 engine family commonly deployed in earthmoving, marine, agricultural, and power generation applications worldwide.

Designed as a direct OEM replacement for the 3116 fuel injection system, this 105-1694 injector provides an exact-fit solution for mechanical diesel engines operating in industrial, marine, and power generation service. The component is qualified to meet original performance specifications, with each injector tested for spray pattern, opening pressure, and leakage rate prior to shipment. This validation process helps maintain factory-level fuel delivery characteristics, supporting stable rail pressures, balanced cylinder contribution, and reduced engine vibration throughout the operating speed range. Fleet maintenance teams servicing 3116 engines in construction machinery, fishing vessels, commercial workboats, standby generator sets, irrigation pump drives, and mining haul trucks can rely on this injector to restore original power output, throttle response, and fuel economy. Because the 3116 series remains widely deployed in legacy equipment fleets across multiple continents, the availability of a fully compatible replacement injector with comprehensive cross-reference coverage reduces downtime and supports long-term equipment serviceability.

Proper installation and routine maintenance of the 105-1694 injector are essential to achieving rated service life in 3116 engines. Before installation, the injector bore should be thoroughly cleaned and all carbon deposits removed to prevent seat leakage and combustion gas blow-by. A new sealing washer must be fitted, and the O-rings lightly lubricated with clean engine oil or specified assembly lubricant prior to insertion. The injector should be tightened to the specified torque value, after which the fuel system must be bled to remove trapped air and checked for leak-free operation at cranking speed. During the engine's service life, operators are advised to use clean diesel fuel meeting the recommended cetane rating, replace fuel filters at the prescribed interval, avoid water contamination of the fuel supply, and inspect fuel lines for signs of leakage or restriction. Monitoring engine smoke color, fuel consumption trends, and cold-start behavior provides early indication of injector wear, while periodic injector testing during major engine overhauls ensures continued combustion efficiency and reliable mechanical performance across all 3116 variants covered by this part.