Thanks for all the help. I took the thing to the shop, they replaced
the capacitor, blew out all the accumulated sawdust and cleaned the
contacts of the stationary switch (whatever that is). The thing now
runs like new. This motor has ventilation ports in the sides that suck
in sawdust so I've put a deflector over the motor to keep that to a
minimum. Maybe this thing's good now for another 50 years.

Thanks again, folks.

Lynn Willis