I discovered blistering on the orange NC hydraulic lines inside the Boom about 20in back from the end of the Boom. Apparently the prior owner of this machine melted the lines during a welding repair. It's a marklift 62 ft straight 3 section boom man lift. I need to be able to pull the lines out enough to make the repair. I am not sure if I will be able to slide the lines out by extending the boom fully. I am using my tractor and a chain to pull the b oom fully out. I disconnected the holding valve and collecting the hydraulic oil from the cylinder as it squirts out. I'm just not sure if the boom will fall apart or be damaged if I completely extend it with my tractor. There is an inspection hole on the underside of the center boom section and it looks like the orange hydraulic lines are looped around. And I am not sure if I will kink them with the boom fully extended. Do the 3 piece booms have to be completely separated to replace the orange NC hydraulic lines?