Caterpillar original 107-7732 Fuel Injector Nozzle Replacement for OEM 3114 3116 3126 Diesel Engine 320B 322B 322C 325B Excavator Engine Spare Part original new injector

The Caterpillar 3116 Fuel Injector 107-7732 is an OEM-specification unit injector assembly engineered for Caterpillar 3114 and 3116 diesel engine platforms. Manufactured to original equipment standards, this injector delivers precision fuel atomization through a six-stage working cycle covering fuel supply, pressure build-up, needle valve opening, atomization, combustion, and power generation. The direct replacement design ensures straightforward installation without modification, supporting long service life and maximum fuel efficiency across demanding industrial operating conditions.

This injector assembly is compatible with a wide range of Caterpillar equipment, including excavators 320B, 322B, 322C, and 325B, wheel loaders 924F and 928G, track loaders 953C and 963B, bulldozers D5M and D6M, material handlers M318 and M325B, and compactor series CS563, CS573, CS583, and CB634. It also supports Caterpillar 3116 marine engines and 3116 generator engines, making it suitable for construction, mining, agricultural, marine, and diesel power generation applications worldwide. Approved cross reference numbers include 127-8216, CA1077732, CA1278216, 107-7733, 107-7734, and 107-7735.

Pre-installation inspection requires checking fuel lines, verifying the injector seat, confirming the correct injector number, replacing copper washers, and cleaning fuel passages. Installation follows a structured eight-step process from removal of the old injector through cylinder head bore cleaning, sealing washer installation, injector insertion, Caterpillar-spec torque tightening, fuel line connection, system priming, and final leak inspection. Bulk order availability and global aftermarket support make this 3116 series injector a reliable choice for distributors, exporters, and heavy equipment service operations.