hp wf865a – f02’ing – motor issue???

as above, 6 years old, went out to it few days ago, unblocked a load of stodge. cos it was F02’ing

just been back to it and still randomly F02ing but i couldnt get it to do it myself. however lots of reverberation from motor, particulary on a slow down, wondered if these models suffered from poor pinion bearings ??? def noise coming from motor as had the belt off.

so um yeah, is this commonplace because ive never come across this issue before… and would the motor noise affect the speed of drainage and therefore be part of the reason why its f02, or is it more likely to be the pump working ineffectively ???

also can it be rectified without putting a new motor in, i.e would i be able to chav some bearings from an old hp motor???