Caterpillar original Caterpillar original Caterpillar 105-1694 Diesel Engine Common Rail Fuel Injector for 3116 Excavator 320B 322B 325B 446B Construction Machinery new injector original new injector

The Caterpillar 3116 fuel injector 105-1694 is a mechanical unit injector engineered for reliable performance in Caterpillar 3116 diesel engines, including naturally aspirated, turbocharged, industrial, marine, generator, and power unit configurations such as 3116TA and 3116DITA. Manufactured from heat-treated alloy steel, the injector body is built for continuous operation under high-pressure fuel system conditions found in heavy-duty construction, marine propulsion, and stationary generator applications. Precision-machined internal components ensure consistent fuel delivery and accurate metering across the full operating range.

Optimized nozzle geometry improves fuel atomization and combustion efficiency, contributing to reduced smoke output and lower fuel consumption in demanding working environments. A protective surface treatment provides resistance against fuel contamination and moisture-related corrosion, extending service life in harsh field conditions. This injector assembly meets OEM durability standards and serves as a direct replacement for Caterpillar 3116 mechanical diesel engines used in excavators, wheel loaders, motor graders, generator sets, marine engines, industrial pumps, compressors, agricultural machinery, and oilfield equipment.

During installation, clean the injector bore, remove carbon deposits, install a new sealing washer, lubricate O-rings, and tighten the injector to CAT specification before bleeding the fuel system and verifying leak-free operation. Routine maintenance includes the use of clean diesel fuel, regular fuel filter replacement, periodic inspection of fuel lines, monitoring of engine smoke and fuel consumption trends, and injector testing during major engine service intervals.