Also, I just put new bearings in mine a month ago and learned this. The holes in the bearing race if very small. if your grease gun is stored in a cold garage/barn, the cold grease will not want to flow through the tiny hole. Worn out fittings may just let the grease leak between gun and fitting. If you inspect the set up and find the grease holes in race are in fact lined up with fittings, replace the fittings and put your grease gun somewhere warm for an hour or so. Pump grease in slowly to give it time to get through tiny hole in race.
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