Both the two fixing points in the front of the front of the supportframe, and the one in the rear of the frame have bronze bushings with grooves for grease lubrication. The bolts in the front are Ø35mm and the one in the rear Ø45mm. All three bolts are machined from Cromax 280x steel piston rods , and they have internal channels for grease lubrication.
The two fixingpoints in the front of the supportframe supports longitudinal rotation, and the one in the rear latitudinal rotation. This is the same sollution (although a bit more heavy duty), as was used in the original supportframe, which was attached when we first bought the truck. It's a bit different than the sollution most Unimog campers seems to use on their supportframes, as they often tend to use supportframes with 4 fixing points. - But the theory is still the same, as the intention is that the stiff supportframe is attached to the flexible chassis frame in a limited number of fixing points which can pivot/rotate. - Thus allowing the chassis to flex quite alot, without transfering the flex to the box on top of the support frame, which might would result in fatal cracking.
Pleace fell free to ask, I'm no expert, but will try to answer as best as I can
