It sounded like it was about to self-destruct, but the fix turned out to be simple.
⇊ Click below for more information! ⇊
My shopvac was making a nasty rattle during use, which turned into a nasty squeal as it was turned off. Rather than throw it away I disassembled it to remove the motor. I added several drops of machine oil to the top bearing (couldn't easily access the bottom bearing) and tested it, and then reassembled it.
It now works fine again. Not bad for a free shopvac that I picked up off the curb on trash day. At least now I know why the previous owner threw it out. But it was such an easy fix! When you have nothing to lose, why not try taking it apart and fixing it yourself!?
More details are on the project web page at
http://www.wordsnwood.com/2016/shopvacfix/
UPDATE SIX MONTHS LATER: Got a bit noisy again, but it was easy enough to pop it open and add more oil
Another more in-depth look at shop vac repair is by Matthias Wandel: https://woodgears.ca/motors/shopvac.html
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