The submitted article describes the finite element analysis of the outer bearing of a Kaplan turbine. The motion was simulated by applying the forces on the links of the 3D model of the runner blade operating mechanism. The paper describes the 3D model of the runner blade operating mechanism. After more studies about the failure of different parts of Kaplan turbines, we see that the problems appear on the runner blade and on the pin lever. Because of these was take the decision to present in the paper the analysis of an outer bearing bush fixed on the rotor’s body, using the finite element method. First of all was done the meshing of brush model and then the stress calculus was performed. For modeling and simulation were used Nastran NX7.5 and Femap.