The results of research of the dependence of the average failure rate and the average operating time of the railway automation and remote control repaired equipment for failure on the periodicity of precautionary substitutions and the depth of restoration of reliability, as well as on the coeffi cient of variation of distributions used to describe equipment failures are adduced. It is determined that the value of the average failure rate in the case of reduction in the periodicity and number of replacements with repaired equipment before replacement with new equipment is reduced, and in the case of reduction in the depth of restoration of reliability of the equipment, it increases. It is possible to achieve a set value of average failure rate of the railway automation and remote control equipment by varying the depth of restoration of reliability or the periodicity and number of replacements with repaired equipment before replacement with new equipment. The operating time of the equipment for failure essentially depends on the depth of restoration of reliability when it is being repaired. There are boundary values of the periodicity of precautionary changes and the depth of restoration of reliability for which repair is inexpedient, because in these cases the operating time of the equipment for failure becomes lower than in the absence of such repairs. There are limit values of the depth of restoration of reliability for which repairs with any periodicity reduces operating time of the equipment for failure, and the carrying out of such repairs is inexpedient. Research results follow that the range of expediency of repairs is expanding for the equipment in which the aging and wear processes are expressed more clearly. The obtained results indicated that it’s possible in operating conditions to achieve the required value of operating time of the equipment for failure by changing the periodicity of precautionary changes and the depth of restoration of reliability.