Went for a load of wood today and my friend says that I have too much end play in the wheel bearings of my trailer & that this is an indication that the bearings are worn. He wants to replace them. Does any one have any knowledge of trailer wheel bearings; I don't have the first clue. He asked me how many times I had taken the wheeel bearings apart and greased them and I said never since i bought it. Then he tells me i am susposed to do that at least once a year and that i had better have new bearings before one ceases up on me . To my untrained eye,they both look ok, spin easy and dont get warm after towing. How do you disassemble, grease and reassemble trailer wheel bearings. How do you tighten wheel bearings. Is there susposed to be end play and if so how much is allowable or is it zero end play. any info at all, would be helpfull. The trailer is a light utility trailer, max load wieght 1000 lbs, trailer gross wieght empty 235 lbs bed 4 ft x 8 ft , single axil, tires are 12 inch outer diameter (at tread), not sure of proper size; would have 2 go look. Thank you in advance.