The working unit of the hydraulic gerotor machine consists in cycloidal gears. In the paper, ways of increasing the load limit for the plastic cycloidal gears have been presented . The objective has been achieved by means of structural and material methods. The modifications have been introduced on the basis of the theoretical analysis of stress and deformation that are generated in the cycloidals gears while in operation. The analysis has been carried out with the use of the finite elements method. The outcome of the analysis is determination of the maximum working pressure value at which the hydraulic gerotor machines featuring the plastic cycloidal gears can operate.