1. Poor lubrication of mine loader. Because the time of equipment assembly is too short, the fit gap between mechanical parts is small, and due to some other factors during the assembly, the uniformity of fit gap can not be guaranteed. The lubricating oil is not easy to form a uniform oil film on the friction surface, so as to achieve the purpose of preventing wear. Low lubrication efficiency leads to abnormal wear of machine parts during early use. In severe cases, it will cause scratch or bite on the friction surface of precision fit, resulting in failure.

2、矿用装载机快速磨损率。由于新机器零件的加工，组装和调整等因素的影响，摩擦表面粗糙，配合表面的接触面积小，表面压力不均匀。在机器运行过程中，零件表面上的凹凸部分相互配合并相互摩擦，被磨碎的金属屑继续作为磨料参与摩擦，从而加速了配合表面的磨损的零件。因此，在磨合期间，容易引起零件的磨损，磨损率快。此时，如果执行过载，则可能导致零件损坏并导致早期故障。

2. Rapid wear rate of mine loader. Due to the influence of processing, assembly and adjustment of new machine parts, the friction surface is rough, the contact area of mating surface is small, and the surface pressure is uneven. During the operation of the machine, the concave and convex parts on the surface of the parts match and rub with each other, and the ground metal chips continue to participate in the friction as abrasives, thus accelerating the wear of the parts with the surface. Therefore, during the running in period, it is easy to cause wear of parts, and the wear rate is fast. At this time, if the execution is overloaded, it may lead to part damage and early failure.

3、矿用装载机松动。新加工和组装零件的几何形状和匹配尺寸有偏差。在使用的早期阶段，它们容易受到交变载荷的影响，例如冲击和振动，以及热量，变形和其他因素，以及过度的磨损。松开原来固定的零件。由于机器零件的松动，振动和机器热量的影响而发生泄漏，机器的密封面和管接头将泄漏出去。在组装和调试过程中很难发现一些铸造，加工和其他缺陷，但是由于操作过程，这种缺陷由于发动机的振动和冲击而暴露，表现为机油（水）的泄漏（渗漏） 。因此，在矿用装载机磨合期间容易发生泄漏。

3. The mine loader is loose. There is deviation in geometry and matching dimension of new machined and assembled parts. In the early stages of use, they are susceptible to alternating loads, such as shock and vibration, as well as heat, deformation and other factors, and excessive wear. Loosen the fixed part. Due to the looseness of machine parts, vibration and heat of the machine, the sealing surface and pipe joint of the machine will leak out. It is difficult to find some casting, machining and other defects in the process of assembly and debugging, but due to the operation process, this defect is exposed due to the vibration and impact of the engine, which is manifested as oil (water) leakage (leakage). Therefore, it is easy to leak during running in of mine loader.

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