Excavator is a big machine , how to choose and buy , what parameters you should consider,is there any tips ?

Here are some references that would help:

(1)Three main parameters for excavators:

The first is engine : The engine isthe power provider ,like the heart to a man which is very important.

The second one is excavator operating weight : Operating Weight = standard machine operating weight + weight of goods loaded (operator + fuel , etc. )

Digging force ≤ M * Operating weight

M:Adhesion coefficient between the ground and the track
If the excavator operating weight exceeds [ M * operating weight] This value , in the case of backhoe bucket machines will slip and pull forward , very dangerous. for front shovel , the machine will slip backwards.

Operating weight determines the upper limit of the excavator . To some extent determines the level of the excavator . If operating weight is not enough, no matter how powerful the engine is,it can use nowhere .

The third is bucket capacity : the larger bucket ,the  higher productivity , efficiency is benefit and profit !

(2) The excavator brands and practicality :

First, Be clear about the use of the excavator you are going to purchase,  for a mining exploitation, use on he construction site , or dredge the river , then the excavator power ,arm length requirements are not the same.
If, as with coal mining and other heavy work, CAT excavator is preferred, because the engine of CAT is very powerful , strong enough ! The disadvantage is the large fuel consumption , and  price is expensive.

If it is used in general construction or roadwork , Komatsu excavator is a good choice , cost-effective , fuel consumption is not very high .

In contrast, Hitachi excavator  ranking immediately afterKomatsu ,whose fuel consumption is low, the overall performance is also good .The more powerful, the  more fuel costs .For small projects ,Komatsu excavator fits good , Hitachi is also good, generally do not recommend buying CAT , for earthwork we do not need that big power . Dredge the river requires excavators with long arm .

(3) Accessories
To consider spare parts supply situation of the brand, is there any local or nearby service shop ,  repair of a problem can be much trouble without after sale service and technical support. For example, Komatsu excavators in China 's service is very complete, all major cities are equipped with service stations, repair and accessories. Such sale is more convenient and faster.

Comprehensive other factors

Note that there are elements that should consider such as track shoe , arms lifting problem and so on. Track is like man’s  feet, arms are like the arms,   important or not ? the machines are very easy to start to try out the pros and cons . If it is used excavators also considering the use life of the machine, the maintenance , the big boom .

And automatic control is also important,in other words,technology.Because if man can not adjust and control,the intelligence can help which can be very accurate.Also technology can provide efficiency and comfortable for your work.

There are issues that need advice or need to buy used excavators and other machinery and friends can contact me.

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