Bosch 0445120400 Common Rail Injector Assembly

The Bosch 0445120400 is a second-generation common rail injector (CRI2-16) designed for high-pressure diesel injection systems. It utilizes electromagnetic solenoid actuation to achieve precise fuel metering and multiple injection events per cycle. The injector supports a maximum system operating pressure of 1600 bar (160 MPa), ensuring optimal atomization and combustion efficiency in heavy-duty off-highway applications. Primary applications include Caterpillar C4.4 and C7.1 electronic common rail engines installed in hydraulic excavators such as the 320D2, 320D, 323D, 320E, 323E, and E320DGC models. The injector assembly integrates the DLLA140P2483 (0433172483) nozzle and the F00ZC01310 control valve assembly, calibrated for specific engine emission and performance maps. Cross-reference interchangeability covers Caterpillar OEM part numbers 449-3315 and T417829, alongside Bosch variants 0445120399, 0445120518, and 0445120347. The component is manufactured to OE specifications for durability under high thermal and mechanical loads typical in construction machinery duty cycles.