Are Turbopower 2 Motors supposed to be serviced?

[alexhoovers94]

I have just bought a Hoover Turbopower 2 standard on Ebay, it was only up the road from me so I thought why not, It is generally in good condition but the bearing sitting behind the fan is a bit growly. When you power it up it cause the entire motor housing to vibrate and it kinda sounds like a normal Turbo 2 but with this extremely irretating vibrating noise.

I was wondering are the motors even designed to be serviced or is it once the bearings go, that is it?
If so, I would be interested if anyone has a good spare 800 watt motor that they are willing to give/sell to me.