Re: Troy Bilt horse drive pulley question
Wow that is a once in a blue moon road find!
I don't recall any slop in the transmission drive pulley. There is some end play in mine, maybe 1/16"-3/32". If you have radial play there, you'll need to take it apart and see what's worn. I'd expect you'd have oil leaking in the area.
Check the engagement lever adjustment block and move down as needed. It needs tweaked as the belts wear. The manual is here on this site as a sticky. Adjustment procedure begins on page 98.
If you do need new belts, the Oregon 75-685 belts are a perfect fit!