At the 7th of October 2021, a planned training of maintenance people from a traditional Czech company producing building concrete elements took place. Most of the lifting equipment at this customer is equipped with technology from Stahl CraneSystems. These components are used on cranes from various manufacturers, so it is no wonder that the maintenance labourer took with pleasure the advantage practically try all maintenance works on these machines. In addition to practicing maintenance activities, an interesting and important topic was the demonstration of modern multicontroller units and their capabilities in relation to the evaluation of operational datas. This knowledges lead to a significant improvement in predictive maintenance and to an increase of operational reliability used lifting technology.