Stuffer unit for an agricultural baler with automatic density control

An agricultural baler, comprising:

• a main bale chamber;
• a plunger reciprocally movable within the main bale chamber;
• and
• a stuffer unit operable in coordination with movement of the plunger, the stuffer unit including a rotatable tine arm defining an axis of rotation and a plurality of tines coupled to the tine arm and extending from the tine arm, the tines are rotatable around the axis of rotation of the tine arm between a first position associated with a loading cycle for loading crop material from a pre-compression chamber into the main bale chamber and a second position associated with a stuffing cycle for compressing crop in the precompression chamber, and the tines are configured to be locked in the first position for use during the loading cycle and the tines are configured to be tripped for movement to the second position for use during the stuffing cycle, wherein the tine arm includes a clutch positioned in the tine arm for allowing the tines to be tripped.