404 International rear main seal

I am having problems getting a rear main seal to stop leaking on a 404 International. I have replaced it twice, the second time taking care to file the adaptor flat, it was warped. Any ideas or suggestions would be appreciated.
 
I have not used a speedi sleeve. There was a groove worn in the crankshaft, but it was very minor. I have moved the seal from the original location. I thought maybe it was overfull( wrong dipstick)
but after checking the book and the quantity drained it was correct. Blowby is not excessive. The seals are a International specific National number, and cost $45.00 each. It seems like the seal is having oil washed up on it as when I took it apart the seal was full of oil up to the lip on the lower side of the crankshaft. I may have to fabricate some kind of shield/gasket that would divert some of this oil away from the seal. I will post pictures when I get it back apart later tomorrow.
 
I have not used a speedi sleeve. There was a groove worn in the crankshaft, but it was very minor. I have moved the seal from the original location. I thought maybe it was overfull( wrong dipstick)
but after checking the book and the quantity drained it was correct. Blowby is not excessive. The seals are a International specific National number, and cost $45.00 each. It seems like the seal is having oil washed up on it as when I took it apart the seal was full of oil up to the lip on the lower side of the crankshaft. I may have to fabricate some kind of shield/gasket that would divert some of this oil away from the seal. I will post pictures when I get it back apart later tomorrow.
 
Well if you have the crankshaft smooth then you could have a lose main bearing. The crankshaft could be settling further than the seal can cover.
 

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