David - I don't know how much vertical play is "correct" for an H. However the pivot shafts on both my Super H and Super M drop between 3/8" and 1/2" when jacked up.
There is no adjustment for end play . However excessive end play can be from a failed (crushed) pivot shaft thrust bearing, a loose or improperly installed worm sector gear, or a missing thrust bearing spacer.
With the tractor is resting on it's front wheels, so long as the 4 bolts that connect the pivot shaft flange to the front wheel bolster flange do not rub on the underside of the fixed bolster, the worm sector gear is reasonably centered vertically with the steering worm, and the steering is not too stiff overall, I wouldn't worry about the amount of end play.
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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