86 causes the rods 78 and 80 to either both push on the ends 68 and 70 of the arm extensions 60 and 66 to laterally pivot the arms 18 and 20 outwardly away from each other or both pull on the ends 68 and 70 of the arm extensions 60 and 66 to laterally pivot the arms 18 and 20 inwardly toward each other such pushing or pulling on the ends 68 and 70 of the arm extension 60 and 66 causes the arms 18 and 20 to pivot about their respective pivot pins 59 and 65 to effect rotation of the plate 76 the hydraulic opening and closing cylinder 72 includes a piston rod 88 which is connected to the other lower corner 90 of the plate 76 an operator utilizes control 43a to regulate the flow of hydraulic fluid through lines not shown into one port or the other of the hydraulic cylinder 72 by way of one of the valves 41 associated with the cylinder 72 causing the piston rod 88 to either extend or retract accordingly and thereby pivot the plate 76 about its center 86 to move the rods 78 and 80 and laterally pivot the arm extensions 60 and 66 by pushing or pulling as described above if an operator wishes to engage a narrow sod roll the control 43a.