The purpose of taking on this topic was to improve the service processes carried out by Knorr-Bremse Systemy Kolejowe Polska Sp. z o.o. Particular emphasis was placed on unnecessary movements and physical effort of employees. The intermediate goal was to find the solution in the simplest possible way using Muda. In order to improve the service process, process mapping for the repaired components, i.e. clamps, hydraulic aggregates and auxiliary unloading units, was performed first. Then, the time-consuming nature of individual activities was assessed and the Pareto-Lorenz analysis was carried out to determine the most time-consuming processes. Based on the results obtained, the use of a crane was proposed to facilitate the process of transferring heavy components between stations. The last step was to evaluate the effectiveness of the proposed solution in terms of time savings. From the company's point of view, the results of the analysis performed are of significant importance. The proposed solution not only reduces the total time of service processes but also affects the comfort of the crew.