Since Tier3 engine reliability is generally relatively high, pay attention to the following relative to other models.
1, the standard and spare system of the electronic throttle Different 1.1 Standard System Standards System, Tier3 Engine The throttle is controlled by the Liugong excavator electronics control system, and there is no actuator controller and actuator. When the standard throttle has problems, Generally, communication lines 751 # and 753 # have a break or matching resistance failure, as well as standard / standby system switching switches, wiring errors.
1.2 Under the standby system standby, the throttle of the Tier3 engine is controlled by the spare throttle potentiometer. By outputting a voltage (0.5-4.5V) to control the throttle, when the spare throttle has a problem, it is generally the communication line 751 # and 753 # There is a failure of the discontinuation or matching resistance, and there is a standard / standby system switching switch at the wiring error.
2, several analog acquisition points Different 2.1 Water Temperature TIER3 The aqueous water temperature is collected by its ECM and transmitted to the Liugong controller through J1939, and the water temperature of Tierl, Tier2 engine is collected by PT1000 water temperature sensor.
2.2 Rotary Tier3 The speed of the engine is collected by its ECM and sent to the Liugong controller via J1939, and the tiERL, TIER2 engine speed is collected by the speed sensor.
2.3 Oil Pressure Press The oil pressure of the Tier3 engine is collected by its ECM and sent to the Liugong controller via J1939, and the water temperature of Tier2 engine is collected by oil pressure sensor.
3, standard and spare system data display After switching from the standard to the standby system, the above three parameters of the Tier3 engine cannot be displayed correctly, and the Tierl, Tier2 engine is not affected.
