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With the development of science and technology, people have long since got rid of the era of manpower reclaiming and loosening the soil. Most of them use small agricultural machinery for agricultural production. Small excavators are the main tools for orchard farmers to loosen the soil. No matter which tool is used frequently, it is easy Cause various failures. If a small excavator fails, don't panic. First determine the problem through the failure, diagnose it, and then repair it. In this whole process, we must follow the following four principles to deal with.

The principle of simplicity

When finding faults, you should start with simple and easy-to-treat faults, and analyze and confirm them one by one from simple to complex. Most modern excavators are machine-electric-hydraulic integrated products with high technical content. When dealing with faults, we generally check the electrical system first, then the hydraulic system, and finally the mechanical transmission system. When inspecting the hydraulic system, check the auxiliary oil circuit, control oil circuit, main oil circuit and key components step by step. Never dismantle or unload it indiscriminately as soon as it encounters a fault, so as not to expand the scope of the fault or cause new faults.

Probabilistic Principle

It refers to the principle of selecting the best according to the possibility of various failure hypotheses.

According to the time and space conditions, model structure and related failure factors of the machine, combined with maintenance experience, give priority to the most likely failure hypothesis. The mastery of this principle directly reflects the quality and technical level of maintenance personnel.

Benefit principle

That is, the failure hypotheses that can be confirmed as soon as possible are preferred, and the failure hypotheses that have the least damage to the entire machine or system, and require the least tools, means, and costs are preferred.

The principle of careful thinking and slow action

Fault diagnosis and maintenance personnel are required to be diligent in thinking, give full play to their subjective initiative, safety first, do not arbitrarily adjust or disassemble parts that should not be easily adjusted or disassembled, especially those that are unfamiliar, difficult to confirm, or difficult to restore after adjustment. Such as the pressure valve and throttle valve of the hydraulic system.

Nowadays, small excavators have the highest utilization rate among agricultural machinery, which can be applied to most of the work needs of agricultural production, because they are frequently used, so individual failures are inevitable, so when you encounter problems, you should try to follow them correctly. To prevent damage to the small excavator.