Not surprising that in a machine design of such vintage that the steering joints are merely clevis and pin type, which should only move in one plane.
Since the track rod would move in unison with the beam axle, a pin and clevis joint would suffice (Until wear becomes evident) Similarly for the drag link, which could accommodate the vertical movement of the axle.
To allow movement in two planes, a ball joint is required.
(Note that Stephenson’s Rocket used a ball type joint between the piston rod and the pin in the driving wheel, to allow for vertical movement of the axle as well as that of the piston rod)
Howard