td5 defender

has anyone had to replace the viscus fan hub bearing that sits behind the pulley to the fan,if so what is best way to do it,prob is there has been a terible metal on metal rattle that goes if you take belt of,so isnt a internal eng prob,its either pas pump water pump,pulleys vac pump that piggy bacs alternator,or that vis fan hub bearing,as i have changed the fan unit,pas pump and water pump,thanks any help well needed cheers

check for play in all the pulleys to find the scrape.

I have a FEELING that you gotta push the bearings out from the back of the plate.