phenian wrote:
I have the Haynes Bike Book, which says about removing the sprocket
'take the opportunity to clean the cassette thoroughly, then flush
the body through with solvent. Then oil with heavy mineral oil
through the gap....'

That doesn't make any sense.

What kind of solvent would you use and what kind of oil?

None and none until I knew what I was working on. I suggest using the
Haynes book for toilet paper and referring to the following websites
intead:

http://www.parktool.com/repair_help/FAQindex.shtml

http://www.sheldonbrown.com

~PB