The Cummins in the Federals had a very problematic fuel system,generally called a "wobble pump",basically just a low pressure distributor system.......about 1950,Cummins dumped it and went to the PT system that was used until electronics ...........Incidentally,anyone notice the Diamond T 980 in the pics has a NR Mack back end .......looks to be a 1/2 and 1/2 .chassis join.
The following user(s) said Thank You: 180wannabe, Lang
Steering lock not necessary. The rims are tapered like rail wheels. As they move from side to side the rolling diameter changes pushing the vehicle back to centre
Like a train the flanges are only safety ridges for cornering and bumps and never touch the rails during straight travel.
The following user(s) said Thank You: 180wannabe, cobbadog