1 The guiding ideology is that "three all" refers to efficiency, all staff, and the entire system. Total efficiency, also known as comprehensive efficiency, involves six aspects and notorious cycle costs, including output, quality, cost, safety, delivery time, labor emotions, and environment. The entire system is the systematic management of the entire life process of the coal washing machine, and the management of the individual business work and departments involved in the entire life process of the coal washing machine into a system.

　　2. The maintenance methods and methods include routine inspections, regular inspections, special inspections, preventive testing, status monitoring, and fault diagnosis for coal washing machines. In terms of repair, we should start from economic benefits. In order to improve the efficiency of coal washing machines, they should be treated differently based on their production impact, including post repair, prevention and maintenance, improvement maintenance, and predictive maintenance.

　　3. The goal of production maintenance. Ensure the optimal working condition of the coal washing machine with the most cost-effective maintenance costs, reduce faults, and maximize the working time of the coal washing machine. Use maintenance methods and means to ensure the highest working efficiency of the coal washing machine.

　　4. Maintenance records and analysis. By analyzing the information from original records, statistical data, and outcome data, it is possible to reflect the time, distribution, and degree of change of the coal washing machine during maintenance work, grasp the rules, determine the focus of attention, and make decision-making decisions.