MTD 956-04015B Variable Speed Pulley Assembly Genuine OEM MTD Part Replaces: 618-04148 , 656-0059 , 656-0059A , 656-0059B , 656-04015 , 656-04015A , 918-04148 , 956-0059A , 956-0059B , 956-04015, 956-04015A 4.75" Dia.