A case erector system comprises a track, a mounting assembly slidably affixed to the track, a picker and erector assembly removably and reversibly affixed to the mounting assembly, an erector arm in the picker and erector assembly configured to engage a first side of a case, and a picker arm in the picker and erector assembly configured to engage a second side of the case, wherein the erector arm is configured to move to a position generally transverse to the picker arm while both the picker arm and erector arm engage the case unit.