[Richard]

I owe John a huge apology. Old age and failing memory are coming at an inconvenient time. I had completely forgotten about this post when John called with his problem.

This is why I pound on the use of the search engine.

Thanks John for taking the time to post your ordeal.

I want to add one thing to John’s commentary that I learned second hand from Jeff King. On the ZF steerable tag coaches there is a hydraulic circuit independent of the hyd pump that provides considerable force to center the rear tags, and inadvertently the front steer tires. That centering force is easily overcome if the hyd pump system is working, but the coach would be extremely difficult to drive in John’s case. John commented to me in off line conversations that the coach was a beast to turn even when rolling. I am commenting just to capture this situation in the thread.