Guess a thermal problem? Blades turn until stopping to empty bagger but won't engage again. Saw a video that suggests a clutch gap adjustment fixes the problem. Video showed a Cadet but sounded like it's a fairly common setup. True? Mine's a Toro MX5875, not a JD, but posted here 'cause it's more a mower issue than being buried in Non-Deere Tractors. Probably send to the dealer if they don't have a huge time-to-fix-delay since it's less than a yr old, but like some ideas of cause just in case we have to deal with it. Too bad there's not a RZT (Red Ztrak Talk) to consult.