Liugong excavator accessories teach you precautions when buying second-hand excavators

2025-05-13

If you want to buy a second-hand excavator, when you go to see the excavator, LiuGong excavator parts manufacturer thinks that it is necessary to hire a qualified old operator to help and conduct a test drive. When buying a second-hand machine, do not be greedy for small discounts. If you feel that the price of the machine is much lower than you expected, there must be some tricks involved, so be cautious when buying a car.

The first thing you see when buying anything is its appearance, and the same goes for excavators. Experienced users can estimate the vehicle's operating condition, working hours, wear and tear at first glance. So what exactly does the appearance look like, and how do you look at it? This is also a problem that many users are troubled by. Next, the manufacturer of Liugong excavator parts will introduce to us what part of the appearance to look at.

At the top of the list, investigate whether there are cracks or welding marks on the large and small arms of the excavator. If cracks are found, it proves that the machine has been working in harsh conditions and has suffered severe damage. Even if such a machine is purchased, it is difficult to maintain.

Secondly, investigate whether each oil cylinder has any signs of collision. If there are any signs of collision, it proves that the machine has suffered severe damage in the past, and the oil cylinder will continue to leak oil. Even if a new oil seal is installed, it will continue to leak oil for a short period of time. Therefore, it is important to check the oil cylinder when purchasing a second-hand machine.

Thirdly, to inspect the four-wheel area, first investigate the driving wheel and guide wheel.

Fourthly, the engine is commonly known as the "heart" of the excavator. Therefore, when purchasing a second-hand machine, it is necessary to carefully inspect the engine. During the test drive, listen to whether the engine makes noise, whether the power is strong, and whether there is a deceleration phenomenon during operation. At the same time, you can also enter the system to observe whether the exhaust volume is large. If the exhaust volume is too large, it indicates that the engine has been working for a long time and needs to be overhauled. In addition, investigate whether the engine emits blue smoke when purchasing a second-hand machine. If the engine has a smoking illusion before starting work, it indicates that the engine has a problem of burning oil.

Fifth, when purchasing a second-hand machine, it is necessary to check the rotating motor to investigate whether it rotates vigorously and whether there is a loud noise during rotation. If there is a noise demand, investigate which part of the machine is announcing the noise, and then carefully investigate whether there are gaps in the rotating chassis. Secondly, it is also necessary to carefully inspect the distributor of the excavator, because the distributor's main function is to control the actions of various tasks. Therefore, when buying a second-hand phone for testing, it is necessary to check whether the various work actions of the excavator are connected and whether there are any interruptions. The test method for determining whether the excavation is powerful is to dig up a bucket of soil and then raise it to the highest point to investigate whether each oil cylinder shows internal leakage. These precautions are important when purchasing a used car, so it is necessary to choose the car carefully.

Sixth, the hydraulic pump is the power component of the hydraulic system, which converts the mechanical energy of the prime mover into the pressure energy of the liquid. The oil pump in the hydraulic system supplies power to the entire hydraulic system. So the inspection of the hydraulic pump is also very important. When purchasing a second-hand phone, it is necessary to touch the hydraulic pump with your hands, investigate whether there is any shaking sensation, and then check whether there are cracks in the hydraulic pump, whether there is severe oil leakage, conduct a test drive, and investigate whether the hydraulic pump is powerful and noise free.

Seventh, check the electrical system to see if all circuits are working properly. Then enter the computer system to check the motherboard. If you can see the working conditions such as speed, pressure, maintenance mode, etc. after entering the system, it proves that the computer board is normal.