Shanghai Second hand Excavator Purchase Guide

Users may want to buy a cost-effective hydraulic servo control device with articulated boom, and need to know in advance what they want to buyShanghai second-hand excavatorWhat functions and components do they have to avoid the situation of 'wasting money'. It should be noted that excavators are not always used as excavation machinery. Construction workers sometimes use them to pile piles or lay pipelines. Therefore, users need to pay attention to the condition of the bucket to ensure that there are no problems with the pile driving, crushing, and walking devices. Another important part is the connection pin shaft and liner of the bucket oil cylinder, and it is necessary to check the tightness of these areas. Many problems are caused by negligence in maintenance and inspection.
When the user starts the machine to move the bucket, boom, and rear arm, they may see the movement of the pin or cylinder, but the boom and bucket do not move because the pin and liner parts have become loose. Another key point is to carefully examine the connection between the rear arm and the excavator. If the connection below the rear arm is excessively worn, it may result in the loss of the entire equipment's value.
The rubber tracks on small second-hand excavators in Shanghai are different from the steel tracks on large machines, as they are suitable for use on grasslands and lanes. Many times, users do not inspect the wear of rubber tracks up close like they do when inspecting steel tracks. The result only shows the wear of the rubber tracks, without seeing a large amount of wear on the sprockets and idlers. Its usage can be estimated by checking the cracks and edge wear on the rubber tracks, just like paying attention to the tire tread when observing tire wear. Due to differences in usage and soil conditions, the working life of rubber tracks also varies greatly.
Carefully inspect the excavator for cracks and welding marks left by non original manufacturing, which indicate that the machine has been overused. Another good method is to place a straight board on the position of the rear arm and stick to see if there is any misalignment or distortion. Special attention should be paid to repairing excess steel plates. There may be some scratches and dents on the second mobile phone, but if there are too many patches on the machine, it may mean that this Shanghai second-hand excavator equipment has been used for a long time.
Checking the hydraulic cylinder and oil pipe is very important. The best case scenario is that the chrome plated surface of the hydraulic cylinder has no scratches, dents, or signs of oil leakage. If hydraulic oil leaks out, dust may have contaminated the hydraulic system. It is also necessary to confirm that the cylinder wall is not damaged or has dents. The gap between the oil cylinder and the cylinder wall is very small, and any debris in the pipeline can cause a large amount of metal shavings to be generated during the operation of the oil cylinder due to wear, and remain in the hydraulic system.
In summary, users should carefully select from the aspects of bucket and boom, cylinder connecting pin shaft, liner, welding on the body, rubber tracks and chassis, driving operation, and engine hood to buy a second-hand excavator that satisfies them.