0004770 Genuine Hitachi external wiring harness for Hitachi ZX120 excavator.

Part number 0003647 is a dedicated external wiring harness assembly for Hitachi ZX110/ZX120 excavators, compatible with ZX110-3/ZX120-3 and models on the same platform such as ZX130K/ZX130-AMS. It is suitable for the electrical system of the Isuzu 4HK1 engine, with a total harness length of about 12m, wire diameters ranging from 0.5mm² to 2.5mm² (graded for signal/power circuits), a rated voltage of DC24V. It adopts a PVC insulation sheath (oil - resistant, wear - resistant, temperature - resistant from - 40℃ to 105℃), and waterproof connectors with an IP67 protection class. The terminals are made of tinned copper (contact resistance < 5mΩ). It integrates external electrical circuits such as the engine, hydraulic pump, sensors and lighting, including 28 connectors and more than 120 wiring terminals. It is compatible with the original ECM electronic control module, with a signal transmission delay of ≤10μs, ensuring stable power supply and signal interaction of the vehicle's electrical system.

Its core function is to connect the internal wiring harness of the cab with external electrical components such as the engine, hydraulic pump, travel motor and working device, transmit power, sensor signals (pressure/temperature/speed) and actuator control commands, and ensure the normal operation of functions like engine starting, hydraulic system control, lighting/alarm. The harness adopts a segmented shielding design (aluminum foil + braided mesh double shielding for signal circuits, anti - EMI interference), with a fixed buckle spacing of ≤300mm, vibration - proof and fatigue - resistant. It is suitable for working conditions with heavy dust, humidity and strong vibration (operating temperature - 40℃ to 105℃), with an average service life of ≥8000 working hours. It has overload protection (harness fusing current graded 10-30A) to prevent short circuits from burning electrical components, and the terminal plug - in life is ≥500 times to ensure long - term reliable connection.

Its core function is to connect the internal wiring harness of the cab with external electrical components such as the engine, hydraulic pump, travel motor and working device, transmit power, sensor signals (pressure/temperature/speed) and actuator control commands, and ensure the normal operation of functions like engine starting, hydraulic system control, lighting/alarm. The harness adopts a segmented shielding design (aluminum foil + braided mesh double shielding for signal circuits, anti - EMI interference), with a fixed buckle spacing of ≤300mm, vibration - proof and fatigue - resistant. It is suitable for working conditions with heavy dust, humidity and strong vibration (operating temperature - 40℃ to 105℃), with an average service life of ≥8000 working hours. It has overload protection (harness fusing current graded 10-30A) to prevent short circuits from burning electrical components, and the terminal plug - in life is ≥500 times to ensure long - term reliable connection.