A manipulator is provided for the discharge conveyor of an agricultural seed cart. The manipulator allows the conveyor to be pivoted between a storage and transport position along the top of the cart and adjacent one side of the cart, and a use position extending from the rear of the cart. The manipulator also allows the conveyor to be swung approximately 180° to either side of the cart for discharge of seed to desired locations during use of the conveyor. The manipulator includes multiple actuators for the pivoting and sliding movement of the conveyor.