A product cart has a frame and one or more tanks forming compartments each having an opening at the upper end for receiving product. The cart includes a conveyor support having a swing arm with a first end pivotally mounted to the frame for motion generally horizontally between storage and use positions, a shift assembly mounted to a second end of the swing arm, and a mounting bracket assembly coupled to the shift assembly. Finally a conveyor is coupled to the mounting bracket assembly. The swing arm is constructed as a parallel linkage having first and second links which form a four-bar parallel linkage with the frame and with the shift assembly to maintain the shift assembly in a fixed orientation relative to the frame as the swing arm is moved. The shift assembly is operable to move the mounting bracket assembly between lowered and raised positions.