First, water tank opening and cold water

在挖掘机发动机超负荷作业、散热不好等情况都会造成水箱开锅的状况。很多修理工的反应是加水。但是，如果这个时候加冷水就会造成缸盖和缸体炸裂，所以这个时候应该先停止发动机，等其自然冷却之后在进行加水。

The overload of the excavator engine and the bad heat dissipation will cause the water tank to boil. The first reaction of many repairmen is to add water. However, if this time adding cold water will cause the cylinder head and cylinder to blow up, so the engine should be stopped at this time, and water will be added after its natural cooling.

二、从不换机油

Two. Never change the oil

挖掘机机油在挖掘机当中的作用尤为巨大，很多修理工对此都很重视。他们完全按照标准要求进行添加。但是，很多的修理工却忘记了对机油质量检查和蜕变机油的更换。长期的只是添加而不更换机油，就会使得发动机的很多部件在润滑较差的环境下工作，所造成的磨损远超正常状态。而且，柴油机在运转的过程当中，很多的污物也会进入到机油当中，如果定期不更换机油，很容易引发烧瓦、抱轴等意外事故。

The oil of excavator is especially important in the excavator. Many repairmen pay much attention to it. They are added completely according to the standard requirements. But many repairmen forgot about the oil quality check and the replacement of the oil. For a long time, only adding but not changing the oil will cause many parts of the engine to work in a poor lubrication environment, resulting in much more wear and tear than normal. Moreover, in the process of diesel engine operation, a lot of dirt will also enter the oil. If the oil is not replaced regularly, it is easy to cause accidents such as burning and holding shaft.

三、黄油胡乱涂抹

Three. Daub with butter

挖掘机黄油其主要地作用是润滑与密封。所以，有时修理工在维修过程当中，就会在其汽缸垫上涂抹上黄油，认为这样子就可以增加其柴油发动机的密封性能。可是，这种做法确实是大错特错的。因为，如果在汽缸垫上涂抹了黄油，当汽缸螺栓拧紧时，必然会有一部分黄油流入到气缸当中。剩下的在外部的黄油在受到高温影响之后还会造成缸垫、缸盖与机体平面之间发生一定的缝隙，这样反倒是降低了缸垫原本的密封性。

The main function of the excavator butter is to lubricate and seal. Therefore, sometimes the repairman will apply butter on its cylinder pad during the maintenance process, which will increase the sealing performance of its diesel engine. But this is really a mistake. Because if butter is applied to the cylinder gasket, some of the butter will flow into the cylinder when the cylinder bolts are tightened. The remaining outside butter will cause a certain gap between the cylinder pad, the cylinder head and the plane of the body after being affected by the high temperature. In this way, the original seal of the cylinder pad is reduced.

四、缸套和活塞产品不进行组合即安装

Four, cylinder liner and piston products are not assembled or installed.

很多修理工在维修的时候，认为新品都应该是规范件。所以，在面对新的缸套和活塞产品的时候往往是不看具体尺寸。这样就会造成很多时候缸套和活塞产品不配套的情况，当大尺寸的气缸配上小尺寸的活塞，就会使二者间隙过大，压缩无力。

Many repairmen believe that new products should be standardized when repairing. Therefore, in the face of new cylinder liner and piston products, often do not look at the specific size. This will cause many times when the cylinder and piston products are not matched. When the maximum size cylinder is fitted with the smallest size piston, the gap between the two is too large to compress.

五、砂布打磨轴瓦

Five. Abrasive cloth grinding axle bush

刮瓦是挖掘机维修当中技术含量相对较高的一项工作，很多的修理工因为自身的技术不过关，就会在进行刮瓦的过程当中直接用砂布进行打磨。但是，在采用砂布进行打磨的过程当中砂布上的沙粒极其容易嵌入到合金当中，加速柴油机轴颈的磨损。

Scraping is a relatively high technical content in the maintenance of the excavator. Many repairmen will wear it directly in the process of scraping because of their own technology. However, when the abrasive cloth is used for grinding, the sand grains on the sand cloth are very easy to be embedded into the alloy so as to accelerate the wear of the diesel engine journal.

六、螺栓拼命拧紧

Six. Tighten the bolt

在挖掘机维修的过程当中，其实并不是螺栓拧的越紧越的。这主要是因为很多部位针对于螺栓的转矩都是有要求的。但是，很多的修理工并不这么认为，他们会尽可能的将其拧到紧，这就容易造成螺栓拧断或者是螺纹滑扣。

In the process of excavator maintenance, it is not the tighter bolt safety. This is mainly because many parts are required for the torque of bolts. However, many repairmen do not think so. They will tighten them as tightly as possible, which will easily cause bolts to break or thread slips.

七、轮胎气压太高

Seven. The tire pressure is too high

如果是轮式挖掘机，在给轮胎进行充气的过程当中，很多的修理工并不注意轮胎气压的问题。这就容易造成夏季工程车辆爆胎的状况发生。

If a wheel excavator is used to inflate the tire, many repairmen do not pay much attention to the problem of tire pressure. This will easily lead to the occurrence of tire blowout in summer.

八、采用明火加温活塞

Eight. Heat piston with open fire

在安装活塞销的过程当中，应该先让活塞受热膨胀。很多的维修人员为了贪图方便，直接将其放在明火上进行加热。但是，因为活塞各部位的薄厚是不均匀的，放在明火上加热就会造成其受热不均，后容易引发变形。所以，正确的加热方式，是应该将活塞放入到热油当中进行加热。

In the process of installing piston pin, the piston should be expanded by heat. Many maintenance personnel directly put them on the open flame for heating purposes. However, because the thickness of each part of the piston is uneven, heating on the open flame will cause uneven heat and finally cause deformation. Therefore, the correct way of heating is to put the piston into the hot oil for heating.

九、气缸间测量不准

Nine. Inaccuracy in cylinder measurement

测量气缸间隙，应该在活塞裙部垂直于活塞销孔的方向测量。但是，很多的修理工在测量的时候，就会因为一时不注意在其它方向进行测量。但是，因为其裙部断面为椭圆形，所以，气缸间隙并不相等。

Measuring cylinder clearance should be measured in the direction of piston skirt perpendicular to piston pin hole. However, many repairmen do not pay attention to other directions when they are measuring. However, because the skirt section is elliptical, the cylinder clearance is not equal.

华体会国际 出租的优势和特点得到了很多客户的认可使用，多年的生产制作经验，将带给您不同的体验，欢迎来电咨询。

The advantages and characteristics of the renting with long arm excavator have been approved and used by many customers. Many years of production and production experience will bring you different experiences and welcome inquiries.