In this paper,the hydraulic drive system of a bulldozer is analyzed.The software EASY5 is introduced to the computer modeling and simulating of the hydraulic driving system of the bulldozer.Taking TQ230 Abulldozer from the SUNY as an example,an analysis about the stability of the imitating system under different loading condition and the change of the parameters of all the parts is made.By changing the displacement of the main pump and motor,the parameters of the system are obtained.It provides a reference ...