There are many kinds of failures of the mixer truck, such as engine failure, hydraulic system failure, circuit failure, operating valve failure, etc. today, I will introduce the circuit failure of the concrete mixer truck to you. When your mixer truck circuit fails and needs maintenance, what problems should be paid attention to?
The first thing to do is to cut off the power. Before cutting off the power, turn off the ignition switch and 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 is the first, so the negative electrode shall be pulled out first and then the positive electrode shall be pulled out during maintenance. The installation sequence is the reverse, and the positive electrode shall be installed first and then the negative electrode.
Some friends will ask: why break the negative electrode first?
1. There is a risk of burning the electrical components when removing the positive electrode first, which may easily cause the loss of burning the computer board. During the actual maintenance of the circuit, many people damaged the circuit and burned the handle due to violation of the operating procedures, because the short-circuit current of the positive and negative electrodes of the battery is very large, and high temperature can be generated instantaneously.
2. If the positive electrode is unplugged first, because the negative electrode is grounded, that is, the metal car body around the positive electrode is negative. If the tool touches the metal car body next to the positive electrode wiring when the tool is used to remove the positive electrode wiring, the positive and negative electrodes of the battery will be short circuited.
3. If you unplug the negative electrode first, because the metal body around the negative electrode is connected with the negative electrode, even if the tool touches it, it will not produce any bad results. When the negative electrode is unplugged and the power has been cut off, there will be no danger to unplug the positive electrode.
Here, we should pay attention to one point: the batteries of the current mixer truck are all equipped with a master switch, but the original ones are not, so it is difficult to operate; Moreover, if it is a dangerous goods transport vehicle, such as an oil tanker, the dash cam on the vehicle is not allowed to be powered off. If the dash cam fails to work after power failure, the owner may have to bear legal liabilities. For more information, please visit our website Let's consult.