Posted by BillS on July 22, 2014 at 10:09:29:
No. 16 Gleason Spiral Bevel Machines are very popular, judging by visitor questions. So here are two links to companies that sell Gleason manuals for No. 16 operation.
I believe they are the same manual, at slightly different prices. They seem to include instruction on making machine settings in correct sequence (Operation), creation of machine settings (Summary) and contact pattern adjustment.
Prices are less than 60 USD, which seems fair to me.
Please comment if you have another source for any manuals.