Which manuals do we need most?

Which manuals do we need most?
While recovering in the new year I plan to scan my Caterpillar Manuals. I have scanned several already, I know I can to a better job than I did on the prototype runs (learning curve).
I have a number of manuals left to scan. I just don't know which ones are would have a higher priority .
Here are the manuals I have...
 [attachment=70214]D4 7U1.jpg[/attachment]

I found this one as well
 [attachment=70225]Img_3817.jpg[/attachment]

all of them are useful to someone. scaning them even just so you have electronic copies and can preserve them is a good idea as for what useful to the club library is books we dont have or better copies of what we do.