Atwood Levelers Sticking

Has anyone attempted to disassemble one yet? As I mentioned, mine appears to be an electrical problem with the motor. Have been a motor guy all my life, my expectation is that a brush is hanging up in the motor as I can correct the problem by just turning the motor back and forth a time or two. It's obvious when I do this there is no binding in the assembly, just a motor that does not run. Generally, cleaning the dirt from the brush rigging and cleaning up the commutator with some fine sandpaper will cure this sort of problem. Apparently the control processor will set the fault if it doesn't see the jack coming off the retract limit in a certain amount of time. It looks to me that all the 'magic' happens in the control assembly and that the jack assemblies are just a 'dumb' motor/jack screw with a limit switch at each end of travel. I would expect that the controller also monitors motor current to be sure the jack screw isn't binding up. I haven't given it a good look-see yet..it's up between the frame and storage bins. Was hoping someone else has had one off and examined it to determine if it can be opened up. Since it's over 10 years old now, I'd also like to clean and re-lubricate the jack screw and nut. I wouldn't think spraying any lubricant on would be of any value as the jack screw is inside where spray won't reach..