I had to change that pulley on my tractor, I am sure my set screws when tight against the crank were below the outer part of the pulley, have you tried to get the pulley to move on the crank? Adding heat to the pulley would help loosen it up.
If all else fails, you could cut the pulley off the center hub, they cut the center hub of the pulley with a cut off wheel (a dremel tool might allow better access to it). I would make the a single cut over the keyway (avoiding damaging the crank) that completely severs the hub at that point, then rotate it 180 degrees and cut like 3/4 to 7/8 of the way through to the crank there. Then rotate it back to first cut and use a sharp chisel and drive it towards the key trying to spread the hub and it should come off. You may have to make several relief cuts around the hub to get it to spread with the chisel.
I am sure the last method would work, of course you will totally destroy the S/G pto clutch drive pulley in the process, but it has to come off to rebuild the engine....or take a sawzall and cut the crank off behind the pulley...of course, the pulley would be a lot cheaper to replace.
|