Did one a few weeks ago, you don’t need to take cover off, Just remove cir clip, after cleaning, I wound Part No 4 back on to shaft with Allen key turning the shaft with a spacer between housing and part, 4 shaft and bearing came out with ease, hope that makes sense.
I also put a small amount of sealer in allen key hole on shaft when finished, I am sure that water gets in behind bearing and thats why it failed.
Peter