Yosemite Sam - You stated that the thrust button is turning if the engine is turning. I have to disagree. When you disengage the pto by pressing the wear button against the thrust button it should stop therefore not grinding up the wear button. When you engage the pto the wear button should end up not touching anything therefore not grinding up the wear button. Alignment is important but not critical. If the thrust button and wear button are "off" a little it will find exact center automatically and as long as the wear button doesn't turn in its mounting hole in the rockshaft lever it should remain aligned.
Dieselsnowmobile - It's not a difficult job at all. There has been an extensive discussion on the matter on another website recently and everything was covered at least once. When you get the set screws out you can use a long, blunt punch at an angle on the carb side to tap, and I mean tap, the pto off of the crank. Keep turning the crank by hand and position the punch in the pulley lip of the pto. Do not hit the punch, just a good tap. It may take quite a few taps but keep rotating and tapping. It has worked every time for me.
Good luck
Wayne
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