frame 32 supported in an open upper end 34 of a hydraulic cylinder chamber 36 the cylinder 30 is pivotably supported in the frame 32 by means of a trunion bearing 38 which allows the cylinder 30 to rotate about trunion axis 39 which is parallel to the axis 19 of the hinge 18 the cylinder 30 has an extendable piston rod 41 and an upper free end 42 of which carries a separable cup bearing 44 the gate 16 carries a spherical wicket bearing 46 which is mounted to a rear side 48 of the wicket 16 in the position shown in fig1 when the rod 41 is retracted and the wicket 16 is down as shown the cup bearing 44 is spaced from but aligned with the spherical bearing 46 as the rod 41 is extended as shown in fig2 cup bearing 44 engages the spherical bearing 46 and the cylinder 30 rotates about axis 39 of the trunion bearing 38 as the gate 16 is lifted it should be understood that the weight of the gate 16 is sufficient to cause the cup bearing 44 and the spherical bearing 46 to engage with sufficient force so that the cylinder 30 follows the gate 16 as illustrated a prop 60 is hinged at one end 62 to the rear side 48 of the gate 16 by means of a pin or clevis bearing 64 the prop 60 has a free end 66 which carries a slotted bearing 68 the slotted bearing 68 rides in a hurter.