So, old SMC Comet 2-130 pump stopped working. The "motor" part was still getting hot, and still getting 250v to it.
Took the front part off, and it seems like the motor is divided into ... er, ...guessing here - an induction bit (the flat plate you can see) and I'm guessing the impeller is the actual armature(?) of the motor. The impeller works fine. Except it is SOLIDLY welded to its pump nuts and in any case would be a total bitch to get to, to remove. Looking at this pump, which I believe is quite old, and bearing in mind the trip to the plumbers merchant is a little way and I only want to make the trip once...
Many thanks.