Hi All,
Not sure if this has already done the rounds of everyone that needs it, but I have a good PDF copy of the Genuine Yamaha Monocross Suspension Service Manual for the first style shock (1975 & 1976 model YZ's, MX's and IT) if anyone wants a copy.  It shows a step by step of how to dismantle, service and re-assemble the first monoshock.
Email or PM me if you want a copy.  When I get a chance, I'll try and post it here.
Email is 
[email protected].
Tony