Reply by MrUnix

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Posted on Craftsman 113.12171 motor burned up, save it or replace it?

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8771 posts in 3439 days

#1 posted 03-17-2017 02:40 AM

Sleeve bearings are pretty typical on those saws, particularly the lower end ones. Surprisingly enough though, bronze sleeve bearings have less friction and last much longer than ball bearings – as long as they are kept maintained! Most think it would be the opposite, since it appears to be metal on metal contact – but the shaft actually rides on a thin film of oil. Once you let them dry up, then it is actually metal on metal, and they can become toast pretty quick.

Replacing them is kind of a PITA. You need to press out the old ones and press in new ones. In addition, those bearings typically have a slot or two in them for the wicking felts to contact the shaft, and sometimes have small oil channels milled into them for greater oil distribution. Usually if the bushings are in good condition, it’s a good idea to pull the wicking felts out, clean and re-saturate with oil before reassembly. They are like like little dirt and grime magnets and you will be amazed at how much crap can come out of them. The metal cap on the inside that covers them should just be a press fit and pop right off with a screwdriver or similar.

Capacitor can be tested with a cheap multimeter in resistance mode. Lots of videos online showing how. Don’t worry, it won’t bite :)


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