T18skyguy wrote:
OK a question. What happens when a tow bar binds? Any way to tell a binding from a non binding ?
A tow bar usually binds when the towed vehicle and the motorhome are not on the same plain. Essentially the tow bar is being twisted and the pins will be tight in the bore making them difficult to remove.
Most tow bars today are of the non-binding variety. The end at the motorhome is on a swivel to prevent twisting. The locking mechanisms on the bars have grooves cut so that they can still be activated whether or not the motorhome and the towed vehicle are level to one another.
Usually the manufacturer identifies these units as "All Terrain".
We currently use a Roadmaster Sterling All Terrain. Our original was a Sterling. It was the predecessor to the All Terrain model. The locking grooves in the bars were square cut. Essentially the lock dropped into a slot. The newer All Terrain series has a more tapered groove keeping the lock from binding.
There are still situations where a "non-binding" tow bar will bind. The most common situation is when the motorhome has been turned sharply and the wheels on the towed vehicle are hitting the turn stops.
They're not fool proof, but will tolerate a much greater difference in angles of the motorhome and towed vehicle.