Reply by SnowyRiver

I have had this problem with my Powermatic dust collector. It ran fine for a couple of years, but then started to squeak. Mine also squeaked when I just turned the impeller by hand. In my case I found the squeak was from the outside motor shaft or bearing (opposite end from the impeller.) I removed the end of the motor case and also the fan assembly so I could see the motor shaft going into the bearing race and motor. I shot some WD40 on the motor shaft while turning the shaft by hand. It stopped squeaking right away and has run fine since. I figured it it starts in again, I have some spray on lithium grease and I will try that next.

-- Wayne - Plymouth MN