My second problem. I replaced the plastic head inner shaft with the aluminum one. While I had it apart I lubed the inner shaft and gears, but I could not lube the outer shaft because I was not sure how to get it apart and put it back together again. Now the heli yaws left even though I have the trim all the way right and the proportional all the way clockwise. Could this be because I lubed the inner shaft but not the outer shaft? I can't imagine what else could have changed. I would also appreciate step-by-step instructions on how to remove the outer shaft and put it back together correctly. Any help you can offer would be greatly appreciated.
The outer shaft comes out through the bottom of the heli. Remove the rear body and front canopy first. Then remove the blades and the inner shaft. I always lay parts on a towel in the order removed to ease reassembly. Next remove the battery tray and skids. You then take the upper bearing cup holder and bearing off the top of the outer shaft, then remove the lower rotor hub taking out the 4 screws. Note that on the top set of screws, they have to go back in the holes in the outer shaft. Loosen the retaining collar on the top of the upper Main shaft bearing block. Gently slide the outer shaft out thru the bottom of the heli. Some times there is a burr or a slight jag on the outer shaft, you may have to sand or file the offending metal bit before the shaft will slide thru the bearings. There is a bearing that holds the inner shaft straight and keeps your spacing between gears in the bottom of the outer shaft. Usually it stays in place and you don't need to worry about it. I had it fall out on mine once, and spent 2 hours figuring out why the gears were binding and slop in the inner shaft. While you have it out, be sure to check that its straight by rolling it on a known flat surface with the gear hanging over the edge. If not straight, follow solo's instructions on how to straighten it. I always lightly polish the outer shaft with 600 grit wet dry sandpaper, and have heard guys using steel wool to finish it off. when ready to reinstall, use a light coating of your preferred oil on the shaft and bearings. that should get yo where you want to be.
Consider that one of your motors is not quite as strong as the other one as a possible cause of your continual Yaw. Not sure how many flights you have on that heli, but those motors do wear out. Also consider gear mesh on both gears,,,,,,,,tight? loose? Keep in mind, there are a number of factors that can baffle all of us, solo's process of elimination is quite detailed and pretty much covers all but the most complex troubleshooting issues. Good Luck, Roll up your sleeves, and keep firing, eventually the target will get hit!
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