Abstract: A rotary powered crankshaft affixed transversely underneath a plurality of endless spaced apart conveyor belts on a tomato harvester. The crankshaft having a plurality of offset journals covered with rotatable bearing sleeves equal in number to the belts is positioned to have each journal bearing sleeve strike a belt when the journal reaches a raised position. The striking of the belts causes shaking of tomato vines riding atop of the conveyor belting to dislodge tomatoes which then fall through the spacings between the belts. The bearing sleeves covering each journal are freely rotatable, being sized with an internal diameter larger than the external diameter of the journal to allow both eccentric movement and rotation about the journal. The bearing sleeves are split lengthwise and include snap locks to allow initial installation thereof, and replacement when worn.