Hi, I think the clutch spring broke on my Mutual Power dropweight stringing machine (MP610, I think), and I am having a hard time removing the main bolt that goes through the drum so that I can disassemble the drum to get to the spring. Does anyone know how I can disassemble the drum and replace the spring on this machine? In the video I saw on youtube, the guy simply pulls the drum apart into 2 parts effortlessly. Mine won't budge. Thanks.