For the front truck, there is a T shaped bar hanging down from the frame. A slot in the middle of the truck engages it.
For the rear truck, the rear apron creates a slot for the drawbar. The rear truck has that same middle slot. a shouldered rivet attaches the truck to the drawbar.
There are other pages related to turbines, as has been posted above.
The Olsen's library is a very valuable resource. Most of it is from the Lionel Service Station manual, Olsens has created some of their own pages too,
