Excavator hydraulics is a complex dynamic system consisting of mechanisms and drives, considering various connections between system elements, the influence of the external environment, technological operating conditions and control flexibility. When constructing automated stages of an excavator model, the hydraulic structure of a single-bucket excavator is defined as a complex dynamic system that allows one to show that the techniques for modeling mechanical systems of excavators are based on the use of the same coordinate method and the automatic construction of equations of motion in the form of Lagrange equations of the second type with variable coefficients. This article presents the results of calculations for the development of a method for analyzing the static, kinematic and dynamic properties of excavator hydraulics in the MATLAB/Simulink program.