Mounting unit of a traction engine drive

Mounting unit of a traction element drive for an internal combustion engine, the unit comprises a drive wheel and at least one driven wheel that are connected by a traction element;

• a guide rail and a pivoting tensioning rail are allocated to respective sections of the traction element, the mounting unit includes components guiding and biasing the traction element including at least one of the drive wheel or the at least one driven wheel positioned by a holding segment, as well as the traction element, which are preassembled externally and combined captively secured into a module, the pivoting tensioning rail is connected by a pivot to the guide rail the guide rail is adapted to be positioned stationary in an operating state and constructed integrally therewith and the tensioning rail can be fixed by a transport securing device indirectly or directly on the guide rail, and the guide rail has a base rail and a sub-rail that are connected permanently by an attachment, the tensioning rail is connected by the pivot which includes a rotational positional lock to the guide rail, and a locally flattened, cylindrical pin of the tensioning rail engages in contours of the guide rail as the pivot, wherein a leg allocated to the guide rail is provided for holding the pin or the contours, and the contours include two circular-ring-shaped holder openings connected by a reduced width opening, and the pin can be adjusted in the contours by pivoting the tensioning rail into an extreme position facing away from the operating position between the holder openings, as a pin dimension in a region of a flattened section of the pin is less than a width of the reduced width opening.