Caterpillar original Caterpillar 107-7733 fuel injector replacement for CAT 3306 engine diesel new injector original new injector

The CAT 3116 3114 fuel injector 107-7733 is engineered as a direct replacement for Caterpillar 3114 and 3116 diesel engines used in demanding earthmoving and construction applications. It is widely fitted to machines such as the 320B, 322B, 325B, M318, 924F, 928G, 938F, 950F II, 120H, 135H, D5M, and D6M, supporting excavators, wheel loaders, motor graders, track loaders, compactors, and asphalt pavers including AP-1000 and AP-1050. The injector delivers precision fuel metering and optimized fuel atomization to support clean combustion, stable idle, and consistent power output under heavy load.

Built with heavy-duty internal components and OE-style fitment, the 107-7733 unit injector assembly is cross-referenced with part numbers 127-8216, 0R-8682, 107-7773, 107-7732, CA1278216, CA0R8682, CA1077733, and CA1077773, allowing distributors, rebuilders, and fleet maintenance teams to source a reliable aftermarket solution. Its engine-specific matching reduces installation complications, while the robust construction helps maintain injection pressure and spray pattern over long service intervals. Careful verification of the part number and engine serial is recommended prior to purchase.

Routine maintenance should include the use of clean diesel fuel, regular filter replacement, and replacement of injectors as a matched set where possible. Before installation, clean the injector bore and fuel system area, install new seals and O-rings, and follow Caterpillar service manual torque specifications. After installation, prime the fuel system, check for leaks, and test idle, acceleration, smoke level, and load performance to confirm correct operation of the 107-7733 fuel injector.