Back to Putzmeister Technology Pumps Cells Free Flow Hydraulics S-Valve Hopper Backup Systems OneTouch™ Econo-Gear Technology: OneTouch™ Available on select models, OneTouch™ “automatically” moves all boom sections and slewing in tandem while keeping the end hose consistently level during boom operation. One simple operation ensures a smooth, uninterrupted concrete flow and more efficient pour.