Well, its been a while but I'm back to looking at this dust collector.
To answer John's question, the original capacitor was 400 MFD 125VAC and the replacement is 400-480 MFD 110-125 VAC, so i think I'm alright with the replacement.
caps.jpg
This capacitor is fine. It is correct for the application. Unfortunately, capacitors are prone to "infant mortality". Without a capacitor checker, it's on blind faith that you believe the capacitor to still be good.
I took out the motor - the centrifugal switch looks pristine and seems to operate with finger pressure.
Dust Collector Motor.jpg
While I was at it, I sandpapered between the contacts.
contacts.jpg
Put the motor back and fired it up without re-attaching the impeller. It ran fine. So then I re-attached the impeller - it now cuts out after a second or so, just like before, and not only that - the impeller is turning in the wrong direction!
If you take the impeller off does it run properly, and how do you know the impeller is spinning backwards?
Not sure what is going on.
PS. I was looking at a replacement centrifugal switch and this switch has an Amp Rating: 20 amp
This dust collector was sold to accept regular house voltage of 120 VAC - and states on the motor 11 amps - is that OK?
Yes, it's fine. If it was the reverse, then it would be an issue.