Runs but won't go.

[Lawnman44]

I have a John Deere D140 and was mowing on an incline, when a rear tire deflated. Not thinking, I pulled it to a flat spot for servicing. Later after reading the manual I realized,I I should have pulled the release lever, before towing it.Now it runs, but won't go. Iknow its probably related to this issue. Question ? What do I do now? Thanks for any help.

 

[ILENGINE]

Did you remove the rim from the axle when you repaired the tire. If so you most likely lost the square key out of the axle/wheel hub.