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3116 Series Injector Model 107-7773 Product Details

The 3116 Series Injector Model 107-7773 is a high-precision, heavy-duty fuel injection component specifically engineered to meet the rigorous operational demands of 3116 diesel engines. Designed with advanced mechanical injection technology and strict OEM quality standards, it ensures stable fuel delivery, efficient combustion, and exceptional durability in harsh working environments such as construction sites, mines, and heavy-duty transportation. As a direct OEM-compatible replacement part, it is widely suitable for industrial machinery, construction equipment, and heavy-duty vehicles equipped with 3116 engines. Below are the detailed product features presented in 5 tables with corresponding descriptions, including interchangeable cross-reference numbers to facilitate maintenance and replacement.

1. Basic Product Information & Compatibility

The 107-7773 injector is exclusively designed for 3116 engines equipped with mechanical fuel injection systems, which are celebrated for their simplicity, reliability, and easy maintenance in heavy-duty applications. It strictly conforms to original design specifications and manufacturing standards, ensuring seamless compatibility with the engine’s fuel system without any modifications. Manufactured in the USA under authorized production standards and certified by ISO 9001, OEM quality, and CE compliance, this injector meets the highest international quality benchmarks. Its mechanical design makes it highly adaptable to harsh working conditions with high dust, extreme temperatures, and heavy loads, providing a reliable guarantee for the stable and efficient operation of 3116 engines. Unlike HEUI-type injectors, its mechanical structure reduces maintenance complexity and repair costs, making it a cost-effective choice for equipment operators.

2. Cross Reference Numbers (Interchangeable Part Numbers)

The 107-7773 injector features full interchangeability with multiple 3116 injector part numbers, including 102-7038, 105-1694, 0R-8473, 0R-0471, 127-8220, and 9Y-4982. This cross-reference compatibility is a key advantage, offering significant convenience for equipment maintenance, inventory management, and emergency part replacement—especially for users who operate multiple 3116-equipped machines with different original injector part numbers. Users can directly substitute the 107-7773 injector for any of the above part numbers without adjusting the engine or fuel system, effectively reducing maintenance downtime, inventory costs, and operational expenses. This interchangeability also ensures that users have flexible access to replacement parts, minimizing equipment downtime in critical working scenarios.

3. Structural & Material Features

The 107-7773 injector adopts a robust structural design and high-quality materials to withstand the harsh operating conditions of 3116 engines and the medium-pressure requirements of mechanical injection systems. The high-speed steel nozzle, with a hardness of HRC 58-62, ensures exceptional wear and corrosion resistance, effectively adapting to poor fuel quality common in construction and mining environments and extending service life significantly. The high-strength alloy steel body resists deformation and high temperatures up to 130℃, ensuring stability under long-term high-pressure operation. Its unique dual-spring design controls the injection opening pressure precisely and ensures rapid needle valve closure, shortening single injection duration to within 1.2ms for more uniform fuel diffusion in the combustion chamber. The precision needle valve, with a 1-3μm clearance, and -patented S-type spray pattern ensure optimal fuel atomization, while the high-temperature resistant Viton seal ring and ultra-smooth sealing surface (Ra≤0.1μm) prevent fuel leakage, ensuring the tightness and stability of the fuel system.  

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