How do you change drive belt-on the cox stockman 3500 hydrosatic?

To change the drive belt on a Cox Stockman 3500 Hydrostatic, first, ensure the machine is turned off and disconnected from power. Remove the protective covers to access the drive belt, then release any tension by loosening the idler pulley. Carefully slide the old belt off and replace it with the new one, ensuring it is properly aligned with the pulleys. Finally, re-tension the belt by adjusting the idler pulley and replace the covers before testing the machine.