I've been working on my Greenfield 12-32 today trying to do the exact same thing.
I want to replace the clutch linings but be buggered if I could remove the shaft and clutch plates/pulleys.
I removed the bearings from each side of the shaft, and have managed to undo the nut next to the clutch plate pulley as per you photo.
I can't get the shaft to move.
I will have more of a play with it next week so I'll look forward to any progress you make.
