I have a 36” SCAG Belt drive walk behind I replaced the spindles after hearing a grinding noise. About a week after the replacement the blade drive belt was making a thumping noise so I looked at the deck and noticed the pulley on one side dropped. I reassembled the pulley and spindle assembly but the pulley still drops. Do the pulley’s need to be at a certain height or level with each other? Also the safety switch for the blade engage stopped working around the same time as the grinding noise.
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