I have a Gravely 152z that just turned a year old with now 60 hours, My left side spindle began making a loud noise, screeching like the bearings were rubbing bear metal which they were, with 30 hours on the machine. I brought it in and they had to change the spindle, however im starting to hear what sounds like that screeching noise again, not as loud yet, from the same spindle they changed. The dealer had initially suggested that moisture can condensate inside the spindle and create rust on the bearing which obviously aint good for the bearings and will eventually wear out the bearing or spindle housing. The dealer said that if you cut wet grass or wash the bottom of the deck off after use, you need to run the blades for at least 5 minutes to eliminate the moisture inside the spindle. well i have been doing that but again it sounds like the bearings in the spindle are messing up again, i dont know the anwser anymore, you would think you pay $7000.00 for a commercial machine not to have problems like this. I had an old Scotts that had grease zerks on the spindle and never had to change a spindle once in 8 years, they need to get away from this dang sealed bearing and put some grease zerks on those spindles. i had spoken to a commercial grass cutter who said you can change out the bearings in the spindle after removing the blade and undoing the bottom of the spindle, the bearings are stacked inside the housing, and he just replaces his bearings when they start giving him a problem, its just that no one should have to go through all that with the small amount of hours i have on this commerical machine. I was wondering if anyone else had problems with maintenance free spindles and what they may have done to correct the problem? Also if someone has changed the bearings in a maintenance free spindle can they give me a detailed explanation how to disassemble the spindle and replace the bearings?