[s-cars] Viscous fan clutch failure?

[Peter Golledge]

Folk,
 
My wife reported some unusual noise from her 95 S6 and no A/C.  I check out
the car last night... everything seems fine.  Get it up to operating temp
with a drive, still no problems.  Looking at the primary fan I see it
turning maybe 60 rpm with the engine idling.  Stops with the touch of bit of
plastic scrap.  No huge play in the clutch but I suspect its dead.    Any
BTDT on the list?
 
With the fan blades off I can easily get a big 32" spanner on the clutch.
Anyone removed it by holding the pulley with rubber filter strap or similar?
 
Regards
-- 
Peter Golledge
 
95 S6, 89 200TQA, 87 LT-1Q, 1979 930