This is how it is configured:
The bottom part of the ROPS bar is an open/hollowed like sq [thick-perimeters], w the brackets that fit inside. The brackets has a threaded receptacle w hole that aligns into the bottom hole of the ROPS bar. The upper part of the bracket has a nut-like receptacle that is threaded too, which one the upper "U" ROPS bar is place over the brackets and the holes aligned, you screw the bolts thru the upper ROPS into the threaded holes of the bracket. Getting the upper ROPS "inverted 'U'" over the brackets is a "beech" for one person. You can barely get the upper ROPS bar onto the brackets, but it takes fitting it slightly on one side, hold the whole thing [heavy too] and take a small sledge hammer and hit the outer side inward to move it over the bracket. Then you have to keep banging/tapping the bracket until the aligns w the holes. The left side I did, but the right side still is not aligned properly. You also have to loosen the lower bolts that go thru the brackets so they can have some play in them to fit maneuver the upper U bar over the brackets.
I thought about securing the brackets first into the upper U bar, then try to push the brackets and U bar into the holes, but that meant more weight to hold and getting those lower holes to align might even be way more difficult. Either way, I am still going to have to keep moving the upper bar until everything aligns on the right side. Maybe I might pull the whole U bar and then grease it some to help with re-fitting it. Once you torque it to spec's [all 4 bolts have lock washers] it should not move regardless of grease or not.
Thoughts ?