Toro GTS self propelled personal pace mower drive not working

[trooper1954]

Hello.....drive on the above captioned mower does not work.....
Belt is on both pulleys and seems firm
Belt drives blade no problem
Both wheels turn freely by hand when off the ground.
Any help appreciated.
Thanks

 

[Rivets]

This manual will probably help you solve the problem. https://www.toro.com/getpub/22446

 

[trooper1954]

Rivets.....really appreciate that....thanks.