Hitachi Excavator Parts ZX450 ZX460 ZX450-1 Main Pump Control Unit Hydraulic Controller ECU ECM X9233055 4428516 X4428516 3550-202163

Hitachi Excavator Parts ZX450 ZX460 ZX450-1 Main Pump Control Unit Hydraulic Controller ECU ECM X9233055 4428516 X4428516 3550-202163

Controller damage generally has the following situations:

1). The generator malfunctions, causing high voltage in the circuit.

2). The battery is connected in series when the user starts the engine.

3). Unauthorized connection of electrical appliances will increase the electrical load and burn out due to excessive current.

4). The generator regulator fails, causing the generator to generate too much power.

5). The battery positive and negative poles are connected wrongly, the wiring harness is aging, and the short ground is poor.

6). Do not repair according to operating specifications, plug and unplug the ECM with power on.

7). The excavator cuts the cable and suffers an external high voltage electric shock.

8). Misuse of fuses with large capacity.

9). Water enters the controller, causing a short circuit.

10). Incorrect wiring or improper plugging of the controller.

1. Function description

1). It is possible to replace the throttle controller of excavator brands that use DC motors (such as Daewoo, Hyundai, Xugong, Liugong, Lonking, Sunward Intelligent, Xiagong, Foton Lovol, Sany, etc.). The electronic throttle function and the hydraulic board are on the same controller. If the throttle part is damaged, you can also put in a universal throttle board to replace the electronic throttle function).

2). Peripheral wiring as shown in the figure above, requires an external power supply, 2 pressure switches, throttle knob potentiometer, throttle motor, and steering sensor. You can have electronic throttle function by wiring as shown above.

3). The throttle can be added or subtracted by the throttle knob. After turning on the automatic idle switch, if the steering is above about 1200 rpm, the automatic idle speed adjustment will be performed after 5 seconds. When one of the conditions of the pressure switch, automatic idle switch, and throttle knob changes, it will exit automatic Idle speed to the position set by the throttle knob.

4). Different engines have different flywheel teeth, so the reverse signal detection will be different.

5). The pressure switch is a normally open type. That is, when the pressure switch is pointing, it is a necessary condition for automatic idle speed. When the pressure switch is turned on, it will exit the automatic idle speed when it is grounded.

6). The calibration sensor connection only needs to be parallel, that is, there is no need to overlap the original car line, only need to peel off the original car calibration sensor harness and parallel the two wires.

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