What tool are you using? I looked at the RN site and couldn't find the correct tool offered. The Rover tool is actually 2 wrenches, one goes on the big nut on the clutch, the other is an even bigger wrench that holds the clutch hub in place. I bought mine years ago when I worked at a LR dealership (the shop had a set but I could never find it so I bought my own). I've since retired. It is possible to get the S belt off without removing the fan but it's a lot easier if you do. You might try jamming a long screwdriver between a couple of the attaching bolts on the fan clutch, never tried that but it might work. GL
Gale Breitkreutz
'03 Disco
'74 Series III 88 (sold, 4/13)
'47 CJ2A