"Six months ago the entry steps started slipping and grinding on both in and out operations. I disassembled the step cam bolt shown here to the left of the black pivot bolt, it was wobbling loose. Made sure it was clean and dry and then reassembled with max torque. I then put witness marks on the bolt in silver and black to keep an eye on it. As of today everything is fine, the step maker just didn't assemble the cam bolt tight. The grinding by the way led to shear failure of the bolt which in many units had happen. The steps then would swing in and out without control.
The left picture shows the arrangement of these spherical end rod bearings. the two are coupled to drive the large rotary shaft which is the step driver."
Written awile back, still no looseness. The bolt is actually a "ball stud, bolted tight to the rotating plate. You ID it as it secures the shaft with the two universals joints. To the steps. This is a three step Lippert