The upper electrical system of the mixer consists of three parts: the electric control device of the water supply system (electric water pump control part, pneumatic water supply system electric control alarm device), the cooling fan control part and the rear clearance lamp, side marker lamp and work lamp.
1) Electric control device of water supply system
①电动水泵控制部分 电动水泵操作开关位于车后部右侧开关盒上，在电动水泵工作前应先确保发动机运转、水箱有水、水管阀门打开。水箱水用完时应关停水泵，严禁无水空转电动水泵，以免损坏电动水泵。电 动水泵工作时开关盒内蜂鸣器鸣叫，起警示作业。
① The electric water pump operation switch of the electric water pump control part is located on the right switch box at the rear of the vehicle. Before the electric water pump works, ensure that the engine runs, the water tank has water and the water pipe valve is opened. When the water tank is used up, the water pump shall be shut down. It is strictly prohibited to idle the electric water pump without water to avoid damaging the electric water pump. When the electric water pump is working, the buzzer in the switch box will sound for warning operation.
② The electric control alarm device of the pneumatic water supply system turns on the raw water pump switch in the cab, the buzzer of the pneumatic water supply system buzzes, the relay of the controller is powered on, the buzzer buzzes, and the solenoid valve is connected. The air source enters the water spray pressure water tank from the air reservoir through the solenoid valve, and the water spray valve is opened for water spray car washing. After water spray car washing, the buzzer still buzzes, Remind the operator to turn off the water pump switch.
2) Cooling fan control section
The start and stop of the cooling fan is automatically controlled by the temperature control switch. The fan starts when the temperature is higher than 65 ℃ and stops when the temperature is lower than 60 ℃. The temperature control switch is located on the cooler, and the relay and fuse are in the power distribution box in the cab.
3) Rear clearance lamp, side marker lamp, work lamp part rear clearance lamp and side marker lamp are used to indicate the size and side contour of the rear of the vehicle at night, and turn on and off at the same time as the rear license plate lamp. The working light is used for night feeding and unloading lighting, and the switch is in the cab.
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