Sat Mar 30, 2013 7:53 am by cornbinder89
Mike, I responded over on ATHS, but really there is no differance between that and a normal steer truck. the 2nd box doesn't have any manual input shaft and just has two hyd cyl and the sector shaft. The main box has two extra lines running from its cyl sections (one on top, one at the bottom) that run over to the slave box, controlling it with the same pressure in the main box. If it is "loosy goosy" on the road, then look to all the same things for a single steer box truck. King pins, tie rod and drag link along with alingment.
The twin box arrangement is done so when large tires and large weight are used on the front axle, all the steering force for the right tire doesn't have to be thru the tie rod, which would bend if the truck was in soft ground.
The right box cannot cause a wondering truck in itself as it only sees the same pressure as the main box.