This is a great excuse to check out the flex disks. You don't want one letting go. The disk stays with the shaft and you only need to remove 1/2 of the bolts. Disks should be replaced if they have any cracks in them.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.