It looks as if there have been failures in the steering linkage, repaired by welding. Unless this was done quite carefully and the repairer understood how the steering works, the result might be a thoroughly messed up steering system. You might begin by looking at the steering mechanism at the bottom of the steering column below the steering wheel. Turn the wheel each way and see where that mechanism is in its range of movement, when the wheel won't turn any further.

My current guess is that the welding was done without much attention to steering geometry. The toe-in might be way out as well. If this is the case, fixing the mess will require either new parts or someone with experience with steering mechanisms.

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If you look at the two parts circled in green in the picture, they have both been welded. The issue that concerns me is whether the original geometry was preserved, so that when the steering wheel is exactly in the midpoint of its movement range, the front wheels point exactly straight ahead.

I've put a red circle around the welding on the pivot point of the steering's pivot plate.

[Linked Image]


On this (fairly awful reproduction of the) illustrated parts list, I've circled the pivot plate in green. That is what yours looked like in its youth, before the previous tenants improved it. It looks to me as if your Greenfield's steering geometry is no longer what it is supposed to be.