Hi - happy 2019 & I know this boiler is old - but so am I! Problem Ecoflam Minor 4 electric motor bearing fan side - noisy. I think that the bearings are 6206-2RS and 6206-2Z. Does anyone know if I am right? Questions A) Which is the bearing for the fan end? B) How difficult is to change the bearings? b (i) - Any special equipment needed pullers, press & the like? Any advice appreciated.