With the development of urbanization, urbanization has been established from time to time. In this process, the role of excavator lengthening arm has been irreplaceable, and the demand for excavators in the market has increased from time to time. But the original excavator is expensive and the delivery time is too long. The vast excavator owner can only sigh at the ocean, so refitting the long arm of the excavator becomes the choice of the vast excavator owner.
How to Prevent the Purchase of Extended Arm of Second-hand Excavator一看油漆
Look at the paint.
For a second-hand excavator, the car's shiny paint may not be a good thing. Except for a quasi-new car, this excavator is most likely to have repainted the car's paint. The repainting is always to cover up some problems, some for the sake of the car's beauty, some for the excavator to have experienced some accident needs to restore.
For example, the door frame and hinges of the cab can be inspected to see if there is paint on the sealant strip of the cab when the cab is inspected. This is an easy-to-see center. Because the new car is equipped with the rubber strip after the door plate is sprayed and dried, the original car will not be painted on the rubber strip. New cab hinges are usually painted separately before they leave the factory and then stop assembling. If the second-hand excavator paints the whole car, it may not be so serious to take them down. It is easy to see the end of the hinges.
Second, look at the engine, pump, distribution valve从外观上来看得话首先是得判别这台发起机有没有大修过，发起机假如大修过的话缸盖螺栓、发起机螺栓肯定是要停止拆装的，这样螺栓上肯定会留下痕迹。还有就是发起机的外观，外观太洁净的那也得当心一点了，正常运用的发起机上面很多灰尘比拟脏是很正常的，毕竟挖掘机的工作环境普遍灰尘比拟大，但是假如发起机上和发起机舱里面都是白白的石粉那也需求留个心眼，需求判别这台挖掘机曾经是不是经常干石方或者是经常在矿上干活。
From the appearance, we must first judge whether the engine has been overhauled. If the engine has been overhauled, the cylinder head bolts and the engine bolts must stop disassembling and assembling, so that the bolts will definitely leave traces. There is also the appearance of the initiator, the appearance is too clean that also have to be careful, the normal use of the initiator above a lot of dirty dust is very normal, after all, the excavator's working environment is generally large dust, but if the initiator and the engine room are white powder that also needs to be mindful, the need to determine whether this excavator used to be often dry stones. Fang often works in mines.
Whether or not the initiator leaks oil is also a key concern. There may be less oil leakage, and oil seepage may occur in general. The easy parts to appear are the edge of the cylinder head, the oil pump and the oil pan around it. The proportion of oil sludge can be seen in the center of oil seepage.
The same is true for large pumps and distribution valves. It is necessary to carefully inspect whether the external bolts and flange bolts at the junction of the pump and the initiator have been removed. A key detail to be noticed in the comparison of large pumps is whether the conditioner has moved. The conditioner of large pumps generally regulates the flow rate. The flow rate of excavators before they leave the factory is adjusted to an appropriate value, if the second-hand excavator is inspected. If we find that the flow has been adjusted, we need to reconsider the value of this equipment. Is it a big problem?
There is also a very easy to be neglected center is the relief valve, relief valve is used to adjust the hydraulic pressure, this value is also adjusted when the excavator leaves the factory, if you check the phenomenon that the relief valve has been adjusted, you have to pay attention to the need to determine whether the excavator has shown a weak phenomenon.
Three look at the water tank.
Water tanks are also easy to be neglected by many users when they check second-hand excavators. If they don't buy a excavator that can only work in winter, they will lose a lot. Local excavators are prone to high temperatures in summer, and excavators that are prone to high temperatures can usually see problems on water tanks. First of all, check their antifreeze, which can be easily seen by opening the water tank cover.
Opening the water tank cover is to distinguish whether the water tank is filled with antifreeze or water. The normal water temperature car is filled with antifreeze, and the consumption of antifreeze during excavator operation is not large. If it is a car that is easy to get high temperature in summer, because the water in the water tank consumes very fast, a lot of water in the water tank is added to ordinary tap water. Long-term use of tap water as coolant tank is easy to rust, open the lid of the tank can see very obvious rust.
There is also a center that can distinguish whether the water tank has rust or not, that is, the drain valve of the water tank. Normally at the bottom of the water tank, when checking the car, the valve can be opened to see what the water swept away is like. If the equipment adding tap water for a long time accumulates a lot of rust at the bottom of the water tank, the valve can be clearly opened.
In order to reduce the temperature of excavators which are easy to get high temperature in summer, besides adding water frequently, the usual way is to change the fan of water tank. The common way is to change the fan with more blades. For example, the original five-leaf fan may be changed into Seven-leaf fan, so when inspecting the vehicle, we can inquire what type of fan the original vehicle's factory standard is allocated, and compare the reproduction field.
Four Views of Cab Environment
As far as our operators are concerned, the cab is a moving home, and most of the working time may be in the cab. Whether the operator can protect the excavator can also see some problems from the cab. If the cab of a excavator is clean and tidy, the tools on board are not thrown at the cab, and the air conditioning is odorless, we can also preliminarily judge that the operator is very sorry for the equipment. If the cab can pick up the equipment so well, the overall situation of the excavator may not be too bad. I'm sure I will also pay attention to self-care.