4ZN20578 Backhoe does not move

Hello, i bought a backhoe 4ZN20578 and it was working fine until yesterday when I disconnected the battery cables to clean them. Now the backhoe does not move in any direction. It starts easily but it will not move. Can someone direct me on what to do/look for? Also, what year would that backhoe be? I know i that I need to get the manuals for it but that will have to wait until next month. Thanks for your help.