One explanation for the problems that I am having with my 12+ years old Hoover AE140 washing machine is that the drain pump is not working as well as it might.
There is nothing obviously wrong with the pump in that that are no hair grips or other dirt inside, it is not open circuit, and it does run.
The motor is quite interesting. It has a stator coil but no brushes so the armature must be a permanent magnet. I presume that it is a synchronous motor, and a new and old motor would therefore run at the same speed under no load. However it could be that the permanent magnet has deteriorated and the motor slips under load which could explain some of the throbbing I see on the drain pipe.
Interestingly there is a clone motor available on the internet, so there must be a market for replacement units.
Anyone else replaced a similar motor?