It can be stated with certainty that maintenance is the defining preventive action that is absolutely necessary to ensure the continuous operation of production equipment and mechanisms in the hammasrihma vahetus intervals between planned repair manipulations. It involves the departure and exercise of control over the operation of machinery, their maintenance in good working order, scheduled inspection, cleaning, washing, adjustment, purging and other equipment repairs. It can be stated with certainty that maintenance is the defining preventive action that is absolutely necessary to ensure the continuous operation of production equipment and mechanisms in the intervals between planned repair manipulations. It involves the departure and exercise of control over the operation of machinery, their maintenance in good working order, scheduled inspection, cleaning, washing, adjustment, purging and other equipment repairs. Individual types of maintenance can be carried out directly on the running equipment using breaks and days off. If there are appropriate permits in the operating instructions for machinery and equipment, they can be briefly disconnected from mains to a complete stop. In such cases, some simple, but not to interrupt the production and technological processes. Regulatory documents GOST, regulating the use of maintenance systems and equipment repair, are 18322-78 «System of maintenance and repair of equipment.» Terms and definitions «and 28.001-83» Technical maintenance and repair of equipment. «Basic provisions.» It is these standards that determine the classification and types of maintenance of electrical equipment. Various types of routine maintenance are performed by the site’s own production personnel or workshop and include hourly and shift control of equipment operation, inspection, lubrication, etc. In terms of the number of staff units, this is reasonable and rational, since it does not require an increase in the number of workers in the repair service. On the other hand, this method allows existing operators to expand their knowledge of the principles of operation and the technical arrangement of industrial equipment.