PTO On John Deere L120

My battery was dead and replaced the battery. Cranked the mower and started mowing. I had to disengage the blades at a point and now they will not re engage. I thought at one point it was the switch. Bought a new one and no go. I can hear the clutch Click when I pull the PTO switch on but nothing comes on. Any help would be appreciated.

Check the deck belt routeing and see if belt is tight on the PTO. If this isnt your problem then its time to remove the clutch. There should be a keyway on shaft or in clutch, if its missing then replace.