The steering is quite loose. Appears to me that the front axle has a lot of forward-and-back movement under the influence of the drag link. None of the joints seem loose or broken.
I see there is a bushing in the center pivot that might be worn (90387-123X7-00). Is this likely to be the problem? That bushing is not available but it looks like something that would not be hard to make on a lathe.