The fault diagnosis and maintenance of the excavator is a hard and complicated work. In the process of fault treatment, the following principles should be paid attention to the confirmation and selection of all kinds of fault hypothesis.
1. principles of simplicity
When finding fault, it should be from simple and easy to handle fault person hand, from simple to complex analysis confirmation. Most modern excavator is machine one electric one liquid integrated product, technical content is high. We usually check electrical system first, check hydraulic system, check the mechanical transmission system, check the hydraulic system, check the hydraulic system, check the hydraulic system, when checking the hydraulic system, when we check the hydraulic system, when the hydraulic system is checked, we should press the auxiliary The order of the oil road, the control oil road, the main oil road and the key components is gradually checked. We can't dismount and unload immediately when the failure occurs, so as not to expand the fault or cause a new accident.
2. probability principle
It refers to the principle of choosing the best possibility according to the hypothesis of various faults. According to the time and space conditions, the structure of the machine and the related obstacle factors, and the maintenance experience, the most likely fault hypothesis is considered. The mastery of this principle directly reflects the quality and level of the maintenance personnel.
3. benefit principles
It is a priority to select the failure hypothesis and the confirmation method that can be confirmed as soon as possible to minimize the damage to the whole machine or system, the tools, means, and the most provincial failure hypothesis.
4. prudent thinking on the principle of slow hands-on
Require the fault diagnosis and maintenance personnel to think diligently, give full play to the subjective initiative and safety first. Do not adjust or disassemble the parts that should not be easily adjusted or dismantled, especially those unfamiliar, unrecognised or adjusted, such as the pressure valve and throttle valve of the hydraulic system.
