Half a century has passed since the first sectional drive was applied to paper machines. Drive units supplied by TMEIC reached1 0, 0 0 0. A lot of main drives have been operated for2 0years or more. Failures of the equipment would be increased. Continuous stable operation of the paper machine is important, however, the failures may cause long down time and less productivity. Therefore, the maintenance and renewal become inevitable more and more for the stable operation of the drive systems. This paper introduces technical points of the maintenance and renewal for the drive systems.
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