This paper presents a study about the influence of the lubricant temperature on the functioning of hydrostatic guidance systems of machine tools. The quality of the working fluid is especially important in the functioning of the hydrostatic guidance systems; during the functioning, it is subjected to the long-term action of high temperatures, speeds and pressures which have a very wide range of variation. By means of the Simhydraulics program in the Matlab Simulink programming environment, was made a functional simulation pattern of a hydrostatic charging system which analyzes the behavior of the lubricant under high temperature when it passes through a restrictor
