Elcarajillo Do motors for rotary pumps have a finite/ limited life ? Mine has an ‘expensive’ smell when warm.
I have removed it and checked that it is turning freely, no binding / rubbing, bearings are fine.
It just seems the motor insulation is getting quite warm.
I replaced the cap a short while ago and it appears to run fine.
The motor in a coffee machine is so lightly loaded, in general they should outlast the machine. That said motors can fail for seemingly no reason at all. At the Trieste exhibition with ACS the outboarded rotary pump for the 2 group Vostok simple didn’t work, no reason, no smell, no bright flash or puff of blue. We took another motor/pump out of a different machine.
If you replaced the capacitor it’s important that it was exactly the right value of capacitance (voltage can be higher). If not this can cause problems and overheating of windings as the generation of the “extra phase” magnetic field becomes weak. This can happen if the capacitor value is too high, or too low. It’s possible the previous bad capacitor overheated the windings I guess and the motor has now failed (shorted/shorting across windings). Or possibly the new capacitor is failing.
Water ingress can sometimes cause problems, but these are usually with the bearings.