The accessories of Komatsu excavator are sometimes damaged, and other brands of excavators have similar problems. In the work of machinery, many owners often shake their heads and say that the computer board of the excavator is broken again, and the instrument is not bright. In fact, most of these problems are caused by man-made fault relations. What are the accessories of excavators that are easy to burn when using machinery Some:

　　1. The damage probability of CPU and instrument on the computer board will be greatly increased if the battery line pile head is in poor contact and the contact surface is oxidized, which is the same as the electrical principle used in the home. If the fuse box is in poor contact or the switch is not in good contact, the light bulb always changes in light and shade, and it is easy to burn the bulb. The mechanical electrical system is the same as the household electrical system, so it is necessary to pay attention to whether the battery pile head contacts firmly at ordinary times.

　　2. The battery line is connected reversely, which is a very serious mistake. The damage rate is very high. If the power circuit and CPU of the computer panel instrument are burned in the light, the wire will be melted in the heavy. If the diodes are connected reversely on the lines of some excavators, the diodes will be burned in the basic way, and the fuse will not be spared.

　　3. If the accelerator motor fails or operates abnormally, the accelerator motor used by the excavator has DC motor and stepping motor. If the motor is overheated and short circuited, it is extremely easy to burn the accelerator control circuit of the computer board, which is an inevitable failure. Usually, pay more attention to keep the accelerator motor assembly of the excavator clean and clean, and the failure probability will be reduced; when the power is on, the accelerator motor of the excavator The connecting rod of the throttle motor can't be pulled. If you want to move the throttle control lever with force, it is likely to burn the computer board of the excavator; the representative brand of the machine using the stepping motor is Komatsu machinery.

　　4. When it is difficult to start the excavator in cold weather, connect the 36V battery power supply to start the machine. This operation method is often used in the old excavator. If it is operated on the machine with computer board control in the newer model, there may be problems. It is easy to burn the main power relay and safety relay. When these two relays burn out and cause short circuit of internal coil, the computer board and instrument on the excavator will follow It's going to burn out.

　　5. The water in the computer board or instrument of the excavator is very common and destructive, especially when the computer board is charged, the water in the interior will basically burn all the copper foil of the internal circuit board and oxidize it, which can't be repaired. Another situation is that the water in the harness of the plug of the computer board will cause the failure of the pin oxidation of the computer board, which is the poor contact between the pin and the welding point of the circuit board.

　　6. The maintenance technician misoperates. Many mechanical maintenance technicians do not understand the circuit. When they suspect that an electronic part is not working properly, they will think of using the short circuit method to test whether the circuit is normal. This short circuit operation method is the least recommended method for circuit maintenance, which is very harmful.