13. It is now time to mount the hinge arms to the bed and put the bed back on. We put the bed on first and used a piece of 4x4 to keep the rear of it up while bolting on the hinge arms with a pair of 5/8-inch bolts. Then the bed needs to be lowered and positioned so that the original bed bolts go into the holes in the hinge arms, here shown being tightened. Next, the bed is supposed to be lifted up. We raised it using the hydraulics, with a piece of plywood between the bed and the scissors.