Posted by mattofvinings on July 23, 2009 at 19:53:06 from (198.208.159.20):
In Reply to: Farmall Super A help posted by M Leberman on July 23, 2009 at 19:38:15:
A possibility is that you may have a spun bearing (or about to).
Here's how (and how I arrived at that). My 460U had the same problem more or less with the carb, which I finally resolved and is working good. I had driven it around a little bit here and there just for testing. Had plenty of oil on the stick.
Next task was to change engine oil (9 quarts!!) and the stuff ran out like water and might as well have been black fuel as that's exactly what it smelled like. I was really concerned as to even the short length of time I had run the tractor, after changing oil to fresh 10w40 I had double the oil pressure.
My supposition is that extended running with full choke (how it had to run before) and probably not much runtime in quite awhile, had been in an auction, then sitting roadside, sitting under a tarp at my house, then short excursions while I did some troubleshooting was enough to slowly add a generous percentage of fuel to the crankcase. In my case I can tell the rings are on their last legs which probably does not help matters any.
Now I am not so worried as it runs better with more oil pressure (other than the smoke which will require a rebuild) but I am worried about the condition of the crank and bearings and the possible wear that was imparted by poor lubrication.
I sincerely hope I am wrong and it turns out better than this. A last thought is: are you removing all spark plugs at the time of cranking the engine by hand?
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