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Some of the most automated equipment in the concrete products industry makes concrete pavers. One of the hardest things in producing pavers is training people to work on the machines, which require well-trained operators. According to Bob Moser, plant manager of Unilock, Aurora, IL, although knowledge of hydraulics and electronics are good, they are not necessary for a machine operator. Paver manufacturing machines require constant attention. They must be maintained daily and maintained well to last. Factors such as high pressure, high vibration, and large number of moving parts create a great deal of wear on the machines, and require regular lubrication. During the winter downtime, many companys will perform intensive preventive maintenance, such as stripping down and rebuilding machines, replacing any worn parts. Along with proper maintenance, safety is essential to a paver manufacturing operation. Employee testing and feedback are appropriate measures to address this issue.