Ok, question is. Is the grease coming out around seal and spindle? If so clean spindle and check for a grove worn in shaft where seal lip sets. If it is do like G said and get you a speedy sleeve for it. If seal is coming out of hub causing leak, part of the problem could be as pappy said to much air in center pocket. Take your fingers and fill cavity with grease before installing and trying to fill through bearing buddy. Also when pumping in grease spin the wheel constantly to disperse grease through T hub. Also if it is coming out take starting fluid, cleaned hub where seal goes and outside of seal. Put a thin coat of red locktite on outside rim of seal before installing and let it sit about a hour before finishing install.
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Charlie Weaver USN/ENC 1965-1979