There are many kinds of faults in the self feeding mixer, such as engine fault, hydraulic system fault, circuit fault, operation valve fault and so on. When the mixer needs to be repaired, what problems should be paid attention to? The first thing to do is to cut off the power. Before the power is cut off, turn off the ignition switch. At the same time, turn off the electrical equipment, such as audio equipment. It is forbidden to cut off the power suddenly when the electrical equipment is running. The specific power-off sequence is as follows: safety first, so in the maintenance, first pull out the negative pole, and then pull out the positive pole. The installation sequence is opposite, first install the positive pole, and then install the negative pole.

为什么先断负极呢？搅拌机厂家在这里给大家解释一下：

Why cut off the negative first? Mixer manufacturers here to explain:

1. 先拆正极存在烧坏电器元件的风险，容易引起电脑板烧毁的损失。在电路的实际维修过程中因违反操作规程，损坏电路和把手烧伤的人很多，因为蓄电池正负极短路电流非常大，能瞬间产生高温。

1. There is a risk of burning out electrical components by removing the positive electrode first, which is easy to cause the loss of computer board burning. In the actual maintenance process of the circuit, there are many people who violate the operation rules, damage the circuit and burn the handle, because the positive and negative short-circuit current of the battery is very large, which can instantly produce high temperature.
              

2. 如果先拔掉正极，因负极是搭铁的，也就是正极周围的金属车体都是负极，如果用工具拆卸正极接线时，工具碰到旁边的金属车体，就会造成蓄电池正负极短路。

2. If the positive pole is pulled out first, because the negative pole is grounded, that is, the metal car body around the positive pole is negative pole. If the tool touches the metal car body nearby when removing the positive pole wiring, it will cause a short circuit between the positive and negative poles of the battery.

3. 如果先拔掉负极，因负极周围的金属车体与负极是连通的，即使工具碰到也不会产生什么坏的结果，当负极拔掉后已经断电，再去拔正极就不会有什么危险了。

3. If the negative pole is pulled out first, because the metal car body around the negative pole is connected with the negative pole, even if the tool touches it, it will not produce any bad results. When the negative pole is pulled out and the power has been cut off, there will be no danger to pull out the positive pole again.

自上料搅拌机要注意一点：现行的搅拌车的蓄电池都是有总开关的，但是原来的都没有，就不好操作；而且如果是危险品运输车，比如油罐车，车上的行车记录仪是不允许断电的，断电后行车记录仪不能工作，车主可能就要承担法律责任了，但是如果是危险品运输车，可以在车上放置一个供行车记录仪的备用电源，这样即使电路出现故障，也不于让行车记录仪断电。

Pay attention to one thing from the charging mixer: the battery of the current mixer has a master switch, but the original one is not, so it is difficult to operate; and if it is a dangerous goods transport vehicle, such as an oil tank truck, the car's dash cam is not allowed to power off, after power off, the dash cam can't work, the owner may have to bear legal responsibility, but if it is a dangerous goods transport vehicle A standby power supply for the dash cam can be placed on the car, so that even if the circuit fails, the power of the dash cam will not be cut off.