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This is an interesting thread. I never have put grease in my hubs until it flowed out. I have never packed a wheel bearing and filled all the empty space inside with grease (I have packed a lot of bearings). I wonder if I am doing it all wrong. I do once a year maybe put in a couple of pumps of grease after towing for awhile when things are warmed up and do not agressivly pump. I take it slow to ease the pressure on the seals. I think that the grease will liquify when running. I also think that a full hub of grease in not desirable except maybe in a boat trailer that is submerged in water or other type of imersed bearing. I suppose that if a bearing sits for long periods without grease, it could rust so maybe the reason for the full hub??
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