Fan Clutch

[JimT]

So, my fan hub/clutch started making some unpleasant noise recently when engaging. Upon investigation it seems that even with engine off and/or without air applied it spins (mostly) freely. When it does engage while the engine is on it moves more air but must be slipping a lot. Right now between lower ambient temps and my light loads the only time the fan kicks on is low air or AC pressure while idling, but that won't last.

Anything I should try before ordering a new one?

Any tips on replacement? I'd hate to have to pull the radiator, drop the coolant and screw around with the AC system if i don't need to.