Got it off. Pics attached.
This one is drivers side (LH when sitting and mowing)
Didn't have to remove the wheel. Working totally blind and only by feel was able to get a crescent wrench threaded in that space and resting on top of the PTO belt.
Fiddled with the sizing on the wrench...
Is the shaft adapter on the underside of the pulley? Between the pulley and the Hydro Gear unit? Do you have to remove the tire to get the wrench back up in there? Thanks.
How to Remove HYDRO GEAR 72972 TRANSMISSION FAN PULLEY
On a Gravely ZT HD 60
Replaced the other side a couple of years ago and cannot for the life of me remember how I got the nut off to allow removal of the assembly. Do remember thinking I got lucky.
So far, I have tried this clutch...