The article describes the application of tools of technical diagnostics of bearings in device for the production of cellulose due to previous difficult disorder of device. Diagnostics of bearings is a very challenging area of operational diagnostics. Bearing damage may be caused by various factors such as the action of excessive forces, unsuitable lubricant, contamination of the lubricant, the lubricant oxidation, degradation of additives, etc. Such factors can significantly reduce the lifetime of technical device. The measurements and expertises that took place, as described in the article, were based on the requirement of operator's technical equipment to assess the trend of selected dynamic parameters, i.e. prediction of possibilities of risk of damage to the technical system in a short time. The measurement and subsequent identification of the real state of technical device has been performed in accordance with the recommendations of standard ISO 10816-3.