A shaker mechanism used in an agricultural machine, such as sugarcane harvesters and sweet sorghum harvesters. The shaker mechanism is configured for removing mud, dirt and plant remains accumulated in a lower protective tarpaulin of a mounting chassis of conveyor rollers and choppers of the agricultural machine. The shaker mechanism includes at least a bar having ends which are fastened on rotary support bearings. The bar is configured to stand at least partially out from an edge of the bearings forming at least a spare surface for contact with a protective tarpaulin positioned on the chassis of the machine.
