2R Packmaster detail The 2R Packmaster, with its slide-sweep method was invented by Cyril R. Gollnick, the Chief Engineer at Leach. His system has become near-universal within the entire industry, the only main differences are in cylinder postion among the various makes that employ it. Slide panel (5) reciprocates within guideways formed in hopper sidewalls, power being applied by hydraulic cylinders (6). Sweep panel (4) pivots around axis where it is fastened to slide panel, and is moved by cylinders (7) affixed to slide panel. Leach uses four rollers to carry the panel in the guideways, though some other makes have used slide blocks instead. 9/12/04 © 2004 Eric Voytko All Rights Reserved Photos from factory brochures/advertisements except as noted Logos shown are the trademarks of respective manufacturers