Originally Posted by MRBB
It looks to have large bolts holding it on but since the bottom is sealed I don't know how HD it is. ...Does anyone know what the specs are for this receiver?
I've never heard of a factory option for a receiver hitch on the back of a 5er. So I'll bet it is a custom hitch that was added by the PO.
To add the receiver, he had to move the sealed covering away from where the hitch is bolted to the frame of the 5er. And on mine, the welder had to add a lot of junk iron to the back of the trailer frame to extended it back to near the rear bumper, and to cross-brace it so the receiver couldn't move sideways.
If the receiver is a commercial product, then it will be stamped or embossed with the weight limits. But mine was home-made from scratch so it didn't include any weight info. And even if it did, those weights would apply only if the receiver frame was bolted to the factory frame of the trailer, and not to some extra homemade frame added to back of the factory frame.
So if your receiver is not a Reese or other major name receiver bolted directly to the trailer frame, then you'll have to judge how much weight it can handle. If you don't have a clue, then any good welding shop can probably look at it and give you a fair estimate of the weight limits.