A transfer apparatus for loading a main conveyor of an implement, for example a seed cart, includes a guide track mounted along the main conveyor, a carriage frame movable along the guide track from a deployed position aligned within an inlet opening of the main conveyor and a retracted position displaced along the main conveyor towards the discharge end from the deployed position, and a transfer conveyor including a discharge end operatively connected to the carriage frame for discharging into the inlet end of the main conveyor in the deployed position. The carriage frame including a swivel formed therein which supports the transfer duct for pivotal movement relative to the guide track about an upright swivel axis and about a lateral tilt axis in the deployed position.