Sent Dale Huston [JLG Industries, Cedar Grove, WI 53013
An Oshkosh Company 877-554-5438 ext. 3701] an email yesterday and lo and behold, he sent me a parts manual as a pdf for my Lull Model 7C Hi-lift.
To say I am happy is an understatement. Up until now I have drawn a total blank in my researches. It is a hefty 137 pages so I will not be sending out print copies to anyone, but if you want to send me an email I can forward you the pdf file. He also kindly sent me a 770 parts manual.
It seems likely, since he was so helpful to me, that he may be able to furnish others with parts manuals for the earlier Super 55 and 550 hi-lift models too.