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Well,,, no one else is gonna dive into this, so I'll make it short and sweet, leaving some for you to figure out. There are actually 3 versions of the hitch. 800, 800A, and 801. The 801 is most noticeable because it has different axle mounts for the top links. The mounts have a rocker assy. and push rods that travel up to the crank arm to act as draft control of sorts. I'm not qualified to comment on how well it works as I have never pulled a plow with the 800, so I cant give a comparison. I've only used my 801. It works so-so, but certainly not as well as the three point on my 20 and 30 series tractors. All of the hitches have a very similar appearance, but they do have many different parts including the length of the top links, casting numbers on cast pieces, etc, etc. The 800 is easily identified as having a large crank handle for adjustment of the RH lift link. There are still a few places that offer a parts manual for the hitch. Im including a link to a place that has a manual that is fairly inexpensive.
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