I have a 36" JD WB mower that seems to have dropped one of the blades a whole 1/2". I didnt notice it until a customer came and told me the lawn looks good right after you cut it, but after a few days it looks like crap. Sure enough I check under the deck and one blade is really low. I didnt hit anything with the blades so I knew it was something big. I took the plate off the bottom of the spindle and the bearing is in pieces. I asked the dealer how much to replace a spindle and he said about $100. Is it possible to replace just the bearings in them and not the whole housing too? The thing is the other spindle's bearings are the same (in pieces). Right now I just moved some spacers from the top to the bottom to even out the blade height as a temporary fix. Any ideas if replacing the bearings would fix the problem or could there be something else wrong? I checked the spindle plate and the deck and neither is bent. Thanks.