Basic machines in opencast mining industry belong to the largest mobile machines – as a rule they are long-lasting and their mechanisms can be and are exchanged and modernized during the maintenance while the steel bearing structure practically is not modernized for its construction.
All the up-to-now modernized machines had their primary drive mechanisms replaced with such that meet the standards for new machines, which as a consequence leads to a considerable increase in the exploitation efficiency and the reduction of maintenance costs. Electrical and electronic parts of the modernized machines are completely new – corresponding to the newest standards in this field.
The safety level achieved as a result of such a comprehensive modernization meets current norms and regulations in this aspect.
The acquired designing, research and implementation experience enable us to generalize that the replacement of design and construction drawbacks in the main bearing structure of the undercarriage as well as the replacement of the carriage steel structure with a new one, with high probability, will result in the increase in the exploitation durability of 30-year-old machines by further 25 years.