Caterpillar original  2645A734 Fuel Injector for 1104D-E44TA C6.4 C4.4 C4.2 Engine Spare Parts Excavator Replacement original new injector

The CAT Fuel Injector 2645A734 is an OEM-specification common rail diesel injector engineered for Caterpillar C6.6 and C4.4 engines, as well as Perkins 1104D-E44TA, 1106D-E66TA, and 1106D series power units. Manufactured through CNC precision machining to original equipment tolerances, this injector delivers consistent spray patterns and accurate fuel metering required by modern electronic common rail systems operating at extreme injection pressures.

Featuring multi-hole nozzle technology for enhanced fuel atomization, the 2645A734 ensures complete combustion, reduced smoke output, and improved fuel economy across a wide range of operating conditions. Heat-treated internal components provide superior wear resistance and extended service life, while corrosion-resistant surface treatment allows reliable operation in harsh environments with varying fuel qualities. The injector functions as a direct replacement for Caterpillar original equipment and is fully cross-referenced with part numbers 320-0680, 292-3780, 306-9380, 10R-7672, 2645A718, 2645A747, 2645A747R, and 4226779M1.

This injector is widely deployed in excavators, wheel loaders, backhoe loaders, diesel generator sets, agricultural machinery, mining equipment, construction equipment, industrial compressors, and road building equipment. Installation requires OEM torque specifications, lubricated O-rings, clean injector seats with new sealing washers, and post-installation ECM calibration to verify injector balance rates. Routine use of clean diesel fuel, regular filter replacement, and avoidance of water contamination are recommended to maintain optimal injector correction values and long-term performance.