If you have'nt done so already, remove the top cover from the rotor gearbox doghouse. lay a chunk of large diameter pipe, about 3" dia. or so across the main compartment opening. I'd put down acouple of 2x4s under the pipe so it does'nt dent the sheetmetal. Now you can hook a cable hoist to the pipe and the rotor and let it out easy. Then when you reinstall it will have an upward lift to it so it slides along esier. If you can put a piece of tin or plastic between the cable hoist cables and the rotor housing so the cable dont get damaged by the sharp edge. While you're this far check the output shaft seal. If its wet, replace it now while you have the chance. Give the cage a good inspection, any fatigue cracks and worn bolt heads should be delt with. When you replace or rebuild the rotor drive coupler, only use american made grade eight bolts to to reinstall it. DONOT use import bolts. You'll probably notice when you take it apart that some or all the origanal bolts are bent or nearly sheared off. Alot of the time this is the cause of that unidentifyable vibration that comes and goes from time to time. If the bolts are bent it cause extra stress on the rubber bushings. So definately replace the bushings at minimum no matter how good they may look. When you take the front bearing support off the rotor, please count and wright down the placement of any shims. The shims should be about the same from rotor to rotor, They are there more for tooling tolerances in the superstructure. When you reinstall the rotor I would'nt use power equipment to push it onto the splines. A cable hoist on each side of the bearing support seems to work well. When you replace the cone make sure your feederhouse fits the cone opening proper. I've came across some that needed some "adjustment" to keep the feederhouse from binding. If they are too tight it make you feederhouse seal fail quickly. Sometimes the spring door uder the feederhouse will not seal corectly either. Above all else, like swede says, just dont get hurt. If its your first attept at this, the rotor can be an awkward thing to deal with. Keep safety first.
