How to check the body mechanism when buying a second-hand excavator? What to pay attention to when buying an excavator

 I want to buy oneUsed excavatorIn addition to considering the performance of excavators in various aspects, it is also inevitable to test the structure of excavators. When purchasing equipment, especially on construction sites, most of them will have stains and soil coverage, and it is very rare to see if the overall structure of the excavator meets the conditions. Although the cleaning is relatively clean in the second-hand excavator market, painting, renovation, and modification are not uncommon, which is also one of the concerns that many people have now.

　　Second hand excavator marketBecause it is necessary to clean and maintain the excavator, and in some collision situations, the market will carry out sheet metal painting. Many customers may think that painting is refurbishment. This idea cannot be said to be wrong, but strictly speaking, refurbishment refers to the entire excavator equipment being sprayed by the public and the internal large parts being repaired to meet the requirements of color and performance. And how can we study the hardware of the excavator body firstThe X-frame, which is the chassis component of the excavator, is used to observe the wear and tear of the contact surface. In harsh working environments, significant twisting and deformation can occur, especially when the X-frame part tilts over. This situation can basically determine that the environment in the original use area of the excavator is relatively harsh.

In addition, if there are no scratches or repainting during the inspection of the excavator body, then the original operating environment of the excavator is good. The inspection of the large and small arms mainly focuses on wear and cracks, and the situation of excavator arm breakage is particularly common in medium-sized excavatorsThe probability of occurrence of 30 ton or above is very high. Generally, unscrupulous merchants will perform simple welding and grinding on the broken arm, and then use a second spray paint to cover it up. When encountering repainting in the large and small arms, especially in the stressed area, caution is needed. The wear of the forearm is mostly caused by the connection between the excavator bucket and the oil cylinder, especially in high-intensity working conditions where the wear is significant. Whether the gap can be treated and resolved under different degrees of wear and tear requires reaching an agreement with the merchant.

Stability testing of excavators requires observation of the inside of the machine body, and if necessary, tools should be used to disassemble the bottom baffle of the excavator to observe whether there are any hidden faults in the internal structure, and to check the internal environment of the diesel tank and hydraulic oil tank for aging. The safety and stability of the excavator body still need to be tested, and the operation of the excavator in all directions should be checked for looseness and deformation. If the body changes shape, it will cause a loss of overall performance and power of the excavator, especially exacerbating the wear of vulnerable parts, resulting in long-term and difficult to repair faults.

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