I found that the "Franklin" manuals can sometimes be better than the "White" counterparts. I know that was true for one of the Whites' top tension thread guide. The Franklin manual had a better picture and description then the actual White manual. Since these machines were made by White, you may have better luck searching for loading White rotary bobbin instructions. To get you started there is this one -
http://www.quiltingboard.com/vintage...c-t172420.html
Janey - Neat people never make the exciting discoveries I do.