Quoted Text
Dave’s last picture is a very good one to show how the caster assembly works. The entire caster assembly is hinged so that it lifts up around that large piece between the trailer arms with the two holes and the bolt. Once the circular lunette on the trailer draw bar has been placed and secured on the truck’s towing pintle, the assembly is rotated up 90 degrees between the trailer arms and secured in place by inserting the handle (just barely visible off to the right) into the two holes.
Then just before you disconnect the trailer from the prime mover, you pull on the handle (I believe it’s spring loaded to the “in” position), lower the assembly to the ground and re-secure it in the down position. Now the entire caster assembly with the wheel (or wheels) can rotated 360 degrees around that bolt.
That is correct Tom the handle is spring loaded in the in position. Pulling out releases it, and it can be a pain to sometimes pull out due to the pressure of the trailer sitting on it. The casting is ramp shaped so that when dropping it to the down position, it automaticly pushes the pins in so that it can full drop in place without having to pull the handle back.