hello kansasdog ,two books below ,bruce oz
for old cats-
http://www.acmoc.org/index.php?option=com_oscommerce&osMod=index&Itemid=60&catID=14&cPath=14
or for newer cats-
http://www.toughquip.com/
.
The one I have I got from the Cat dealer I retired from. I ask the Sales manager if he had any and he gave me one that was out dated for them so it,s 10 years old now but I have had it for a few years now.I guess the factory updates them all the time so check with your dealer and maybe you can get one too that will cover all but the latest stuff.
I got one from the Cat dealer a couple of years ago; Serial Number Index, SEBF9451-32 dated July 2006. It's a little confusing the way it's laid out but with enough time, most equipment can be found. My memory may be going bad but it seems the cost wasn't too bad.