The way we do it in our shop is on the left side keep the bowtie on remove the shield to the separator area, remove the cotter pin and pull shaker arm off. Gives you a chance to check needle bearing in the bowtie as well as the pin for wear. On the right side we remove the bowtie and shaker arm as one assembly (It is a tight fit but it will come out of there). Remove the four 1/2" bolts on top of the bowtie, next remove the outer two 1/2" nuts, the bolts have carridge heads on them and can stay in because they under the chaffer rail, the inside two 1/2" bolts will have to be removed from the inside of the combine.