Its disadvantage is the extra maintenance required due to the high number of moving parts and wear items.
If one blade hit something and a gear tooth broke, the whole gearbox would suffer a catastrophic failure, and there would be nothing worth fixing.
Modern disc mowers use isolated gearboxes, and if one fails it can be swapped out without rebuilding the entire machine.
The flail conditioner is an arrangement of steel Vs on a main shaft that beat the crop against the top of the mower-conditioner.
If caught early, the user can shut down the machine and cut the hay free by hand.
Not only can this damage the rolls, but also the belts on the mower-conditioner can snap, and the tractor itself will be receiving considerable amounts of stress on its engine.
Even though this can be a major money and time-consuming problem, if the user is alert and constantly aware of their equipment's performance, this issue should never go further than a small stoppage.