... this week I purchased the following:
F350, CC, PSD, 4X4, LWB Dulley w/ 4:10 gears.
What is my Max Pin Weight?
Year matters. But assuming it is the 2006 in your sig, then your GCWR is 23,500 pounds and your GVWR is 13,000 pounds.
Your wet and loaded tow vehicle should weigh about 9,000 pounds unless you haul gobs of tools and junk in the pickup toolbox. So that leaves about 4,000 pounds for pin weight without exceeding the GVWR.
And a GCWR of 23,500 minus 9,000 for the tow vehicle leaves 14,500 pounds as the max weight of the trailer without exceeding the GCWR of the tow vehicle.
To verify those numbers, you need to load the tow vehicle up with mama and the kiddos, go to a truckstop and fill up with diesel. then weigh the wet and loaded tow vehicle. If it doesn't weigh about 9,000 pounds, then adjust all the numbers above accordingly. For example, if your wet and loaded tow vehicle grosses 10,000 pounds (and some do!) then the max trailer weight falls to 13,500.
A 5er that grosses 14,500 will probably have about 18 to 20 percent pin weight. But even it it's more, that's a lot less than 4,000 pounds. So gross trailer weight - not pin weight - is your limiter.
Don't try to guess how much junk your sweetheart will haul in the trailer. Instead, go by the GVWR of the trailer. Don't even consider any trailer with a GVWR of more than 14,500 pounds.
Some RVs don't mention GVWR. Instead the specs include dry weight and max cargo weight. Add those two together and that's the GVWR of the trailer.