I have this same problem, I've been working at it for over a year and a half and still no results. Good luck with yours!
I would need to know more. Does it move freely when you hold down the carriage release? Is it totally unresponsive to both the spacebar and the keys? Do the typebars hit the platen OK?
The typebars hit the platen ok, it does move when I use the carriage release, but not very smoothly, and it is not responsive to the keys nor the space bar. I'll figure it out maybe with some trial and error, but any pointers would be awesome. Thanks guys are all the best.
Sounds like the toothed rack or the escapement may need adjustment. This can be complicated and delicate stuff. Try downloading this 1946 repair guide and studying pages 76-77:http://site.xavier.edu/polt/typewriters/amesmanualocr.pdf
Thanks for the download, it looks a bit complicated, I got this hunk of a thing at a local thrift store knowing it would be a fixer upper. Looks like my weekend will involve that elusive 'dog.' I'll keep everybody posted, and thank you for your help.