As we all know, especially the professional excavator master. There are many crushing hammers, or there will be all kinds of small problems after a long time. Because most of the places where excavators work are in the field, especially in mines. If the maintenance personnel don't come in time, it's easy to delay the construction period. Therefore, our drivers finally master some basic maintenance skills and can simply solve the problem of breaking hammer. During the working process of the crushing hammer, we often encounter the problem that the crushing hammer does not strike. Our maintenance experience in recent years has summarized five aspects for you. We can simply judge and solve the problem when we encounter no strike next time.


If the crushing hammer does not strike, it will not sound once struck. After lifting it, it will not sound again. Check from these five aspects:


1. Reversing valve stuck.


After the disassembly and inspection of the crushing hammer, it is found that other parts are in good condition. After the inspection of the directional valve, it is found that the sliding is astringent and it is easy to get stuck. After the valve core of the directional valve is removed, it is found that there are multiple strains on the valve body. Replace the valve core of the directional valve.


2. Improper replacement of bushing.


After replacing the bushing, the crushing hammer stops working. It does not strike when pressed down, and there is striking action after slightly lifting. After replacing the bushing, the piston position is higher, resulting in that some small directional valve control oil circuits in the cylinder body have been closed at the starting position, the directional valve stops working, and the crushing hammer stops working.


3. Upper cylinder block oil inlet.


The crushing hammer gradually becomes weak in the process of striking, and finally stops striking. Measure the nitrogen pressure. The pressure is too high. After release, it can strike, and soon stop striking. After measurement, the pressure becomes higher. After disassembly, it was found that the upper cylinder was filled with hydraulic oil, and the piston could not be compressed backward, resulting in the failure of the crushing hammer. Replace the sealing components.


4. The accumulator components fall into the pipeline.


During the inspection, it is found that the deformed parts in the directional valve are stuck in the directional valve.


5. The inner sleeve of lower cylinder is worn


After long-term use, the inner sleeve of the lower cylinder is worn, and the position of the piston crown is upward by the drill rod, which is similar to the second article.


The above are the problems often encountered in maintenance. Of course, there must be many phenomena that have not been encountered. Please forgive me for the shortcomings.