I'm trying to track down a workshop manual for the Royal windlass. I've tried the Lofrans website without success apart from an exploded diagram and parts list.
I don't think there is one, either. But the exploded drawing is pretty good, and it's a fairly simple device - what information were you hoping to find in a workshop manual?
Don't think you need one. As as been said they are very simple devices and are lubricated for life so servicing, such as it is, is very basic. The website exploded diagram is probably all you will need. I've had two ( on different boats) never had a problem.