Ford 851 governor seal A vs. B

I posted a few weeks ago about oil coming out around my shaft going out of the timing cover and covering my pulleys. I received excellent advice and I ordered the recommend front main crankshaft seal. When I went to instal it, I actually discovered that I had one, it was just covered in oil and grease, but once I cleaned it out, it was in good overall condition. I originally did not see it and I thought that
part was missing. So apparently that was not the problem. I also was told to get the EAF 18183-A. I ordered what I thought was correct, but when I open the box, it is very very small and can't find a diagram where it belongs. I did notice on the box that what I have is the EAF-18183-B.

I assume that there is a big difference between the EAF 18183-A and the EAF 18183-B, or if it is the same thing, then I have no idea where it goes.

Thank you for your advice. Again, I as a stated before, I never seen a coil, taking apart a carburetor, etc. So diagrams or pictures help, I do have 100 hours working on this tractor with less than 10 hours of tractor time. As soon as I find the reason oil is coming out around the pulley shaft, I should be in business, well until something else goes wrong.

Thank you.

That seal goes on governor shaft. Have to remove spring pin in fork pull arm out. The pulley seal # C0NN6700A.

(quoted from post at 20:31:24 12/15/18 ) I received excellent advice and I ordered the recommend front main crankshaft seal. When I went to instal it, I actually discovered that I had one, it was just covered in oil and grease, but once I cleaned it out, it was in good overall condition. I originally did not see it and I thought that
part was missing. So apparently that was not the problem.

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How hard is the seal rubber? I'd still assume you need to replace it and that unless your timing cover is cracked it is your problem!

I also was told to get the EAF 18183-A. I ordered what I thought was correct, but when I open the box, it is very very small and can't find a diagram where it belongs. I did notice on the box that what I have is the EAF-18183-B.

I assume that there is a big difference between the EAF 18183-A and the EAF 18183-B, or if it is the same thing, then I have no idea where it goes.

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Same thing. B seal supersedes or replaces the A seal.

click here, check out part # 10: Governor Shaft Seal

One other possibility, as I think Bern mentioned before; is that your crankshaft is extremely grooved where the seal lip contacts it. You still need to replace the seal and obtain a wear sleeve for the crank if that's your issue.

Kevin, to see the sleeve that Larry referred to google Speedi-Sleeve. I have use a couple.

The seal does not seal on the crankshaft. It seals on the hub for the pulley. The bub is replaceable. I suppose a speedy-sleeve would work on the hub also!

(quoted from post at 12:58:29 12/16/18) The seal does not seal on the crankshaft. It seals on the hub for the pulley. The bub is replaceable. I suppose a speedy-sleeve would work on the hub also!

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Yes, I put one on the pulley hub on my 961.