I have a Yanmar YM165D that leaks oil from the right front wheel (4 wheel drive casing where the top and bottom units fit together. I have put two seals (one after another) and discovered that this did not help. Apparently the surface has some irregularity which causes the oil to bypass even a new seal. Some have suggested a "speedi-sleeve" which supposedly takes up the wear but I have been unable to find such a product. (size is 135 mm) Hoye does not have them but says they are available at "any bearing supply" store. Not so, so far. Has anyone out there had this problem, and if so what was the solution, if any there be..................??? Thanks from an oil soaked Yanmar owner.........Catch