I had the Automotion Power Shade, part $ 73551, fail on a recent trip and I investigated rebuilding since the shade itself is in perfect condition and only the motor itself failed. I did find a little bit of information but nothing directly applicable to my particular shade construction. However, I did find enough information to buy a RollerTrol motor that would fit and I rolled the dice on whether I could adapt it to make it work. Note that RollerTrol does have a write-up on their web site written by another IRV2 member, however the internal construction of his shade was different than mine.
Automotion will not
sell a new motor and I wasn't getting good answers from a US vendor on buying a new shade, especially why it cost $50 for shipping from Florida using ground transportation. The shipping escalated replacement cost to nearly $300, which is why I attempted a rebuild. The new motor cost $118.
This shade is installed in a 2005 Newmar Kountry Star 3742. Not sure what other manufacturers and years use this particular shade but it is likely that a number of them did. Attached is a pdf file with instructions and photos that I hope will help others who find themselves in the same situation.
If you have any questions, let me know and I will do my best to answer. I did the rebuild in August to my memory may be a bit foggy at this point