Thanks John, for the mechanical info on these.
If I may, a little more on where they originally worked. Bananera was the site of the United Fruit (Compania Agricola) banana plantation in Guatemala. This was East of Guatemala City. They had extensive holdings & operations there at one time and their own industrial line interchanged with the old IRCA in a couple of locations on the Atlantic Division. Mainline trains of bananas were called fruteros and were so big that they got helpers on grades. This traffic mostly moved to Puerto Barrios and was loaded aboard ships for export.