The design and calculation of new types of gearing and gearboxes based on it require an analysis of the loading of the teeth during operation. This allows to evaluate the 115 strength properties of the teeth in engagement and the smooth operation of the entire mechanism as a whole. The paper presents a variant of the analysis of the loading of the teeth by means of simulation modeling with various preload parameters. The analysis was performed using CAD SolidWorks by identifying areas of interference between the teeth of the cogwheel and gear. Since the volume of the interference zones, with the elastic deformation of the material in the contact zone, is to some extent proportional to their loading, the volume of these zones provides opportunity indirectly judged about the loading of the teeth themselves in engagement. The proposed version of the simulation analysis of loading is implemented on the example of a kinematic wave reducer with a modified Novikov gearing.