<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_1_1480075807070_2825">Hi All,</div><div id="yui_3_16_0_1_1480075807070_2825" dir="ltr">I have an idea to replace the hydraulic pump for my new manipulator with a air over hydraulic system. It is quite simple, the hydraulic oil reservoir is a hp tank that can be pressurized from a designated HP supply. The oil return goes to another HP tank to receive the oil. This eliminates the pump completely and that is a dream. The manipulator can go through 54 complete extensions and retractions, that is 54 complete movements of all functions. </div><div id="yui_3_16_0_1_1480075807070_2825" dir="ltr">After the oil is used up, the oil can be returned to the pressure tank by reversing the air flow.</div><div id="yui_3_16_0_1_1480075807070_2825" dir="ltr">Hank</div></div></body></html>