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The bolts are special. They have an oval-shaped head behind the clutch that moves the clutch dogs that squeeze the clutch plates against the driving disk to transmit power from the crankshaft to the transmission. 1. Remove the clutch lever rod. 2. Remove the four bolts on the clutch fork housing (where the pulley brake attaches)and slide the C-shaped clutch fork forward and out of the housing. This will allow the pulley to slide off the crankshaft once the driving disk is removed (see next step). 3. Remove the crankshaft bolt in the center of the pulley. Verify timing marks on the driving disk and the crankshaft as it is balanced. Make your own timing marks (scribe or paint) if none are visible. Use a puller of some type to pull the driving disk off the crankshaft. (I used a metal plate with 1/2" bolts on the end of the crankshaft to press the disk off.) 4. Once the driving disk is off, the pulley will slide off the tractor. Keep things organized so you can put them back in the right order. Then you'll be able to get at those bolts. NOTE: You may have to move the rear wheel out in order to get the pulley off the crankshaft. I hope your wheels are already out far enough. This all sounds easier than it really is and it may take you a couple days if things are stuck together pretty bad. Post back if you have more questions and stick with the "tractor-shaped piece of rust" as we can all relate.
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