I see the 424 has a similar steering system as on the 240U I bought last year. The steering was so bad that you could turn the steering wheel a full revolution before it engaged the wheels. One major difference is that you have shims on the vertical worm gear shaft. If those are worn, broken, or missing, the vertical shaft will lift as the worm shaft turns. There can be no vertical movement of the worm gear.
In my case I discovered both the worm shaft (horizontal) and worm gear (vertical) were in like new condition. However, the tapered shaft the Pitman arm attaches to the worm gear was badly damaged due to the Woodruff key slot being enlarged. Only a little motion (maybe 10 degrees) in the gearing translates to a lot of motion in the steering wheel. Apparently this was a not uncommon problem, cause when I found a used worm gear ($200+), it was in the same condition and I returned it. Finally had a machinist repair the original.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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