I need a detailed routing diagram for the drive belt on a sabre model 1742 hydro. The original shreded so have no idea how to route. Could use size of belt and/or part number also.

Try this one
Luck

Also see
Installation, Repair and Replacement of John Deere Sabre 14.5/38 GEAR Tractor Drive Belt GX10062 (http://outdoorpowerinfo.com/repairs/deere_sabre_drive_belt.asp)
Installation, Repair and Replacement of John Deere Tractor 100 Series Drive Belts (Yellow Deck) (http://outdoorpowerinfo.com/repairs/deere_110a_yellow_drive_belt.asp)

Where can I find the bolts for the engine pulley?