I have a vibration problem with my 98 e300...

How do I check if an idler pulley, power steering pump or fan clutch pulley is bad? I removed the belt and all turn to some degree.

*PS pump turns freely, but will not spin or freewheel
*idler pulley turns freely (not as much as PS pump), but will not spin or freewheel
*fan pulley turns freeley- same as idler
*AC pulley? (below PS pump) spins very easily and freewheels when let go.

any suggestions?
How free/ tight should they spin?

see for full description
e300 rough idle? air leak? help?

thanks in advance
Phil

__________________
Phil
Previously loved
variety, but I miss the 99 F350 PSD- 37k, traded, damn

Current stable
98 E-300 TurboDiesel, 253k
http://www.facebook.com/people/Philip-Underwood/762882374