Hello again everyone.
As I disassemble my R27 I am looking a a fairly thick (1 mm) coating of stuff on the transmission face where the input shaft is. I guess this is caked on clutch dust from a few decades of use. It will scrape off easily, but creating dust in the process, so I bet you know what I am wondering. Asbestos a possibility from the clutch? Any opinions? I have no idea what clutch disks are or were made of. The clutch I disassembled, despite some rust, is in fine shape so I am guessing not the original.
I would assume that both the clutch and the brake linings have asbestos in them, and treat them accordingly.
Also, if the clutch dust has caked onto the trans face, is this only around the input shaft area, or maybe leading down from there? I would want to check to make sure that the input shaft seal isn't leaking, because this is the most likely way of contaminating the new clutch disk with oil.