Chapter I Introduction to Hydraulic and Pneumatic Transmission When pump 1 driven by a motor is operating,the hydraulic oil flows from To shift left reservoir 8 pass filter 7, through inlet and outlet of pump,via adjustable throttle valve 2 and stops at the "mid position"of the valve 3. Or to shift right Mid position Valve 3 is a shift valve Valve 2 is used to regulate the speed of an actuator Valve 6 is used to set the DVD pressure of the system. Homepage List Upwards Downwards Retun Exit Chapter 1 Introduction to Hydraulic and Pneumatic Transmission 7 When pump 1 driven by a motor is operating, the hydraulic oil flows from reservoir 8 pass filter 7, through inlet and outlet of pump, via adjustable throttle valve 2 and stops at the “mid position” of the valve 3. To shift left Or to shift right Mid position Valve 3 is a shift valve Valve 2 is used to regulate the speed of an actuator Valve 6 is used to set the pressure of the system