Hi Scott, welcome to the forum. I thought there was a serial # reference in the store on this site but I don't see it listed. Perhaps someone might know if ACMOC has a publication. In any case, I picked up a serial # reference from Cat from online a few years ago so they're available. I have publication SEBF9451-30 dated March 2004. You can order the publication from catpublications.com
Regarding tooling, ACMOC has a fuel valve wrench that enables you to shut off the two valves on the fuel tank (the drain and the outlet). Cat has the injection pump bleeder tool, which is a 1/4 drive socket that fits over the 1/4 bleeder screw. A couple of folks on here have the track wear gauge. Other specialized OEM tooling like hydraulic pullers are uncommon but it's easy to adapt modern tooling to suit. For example, I had a machinist turn down a couple of adapters (basically just donuts and bushings of specific sizing so very easy to make) that worked with my cheap online hollow ram cylinder and so was able to push and pull all the hubs and sprockets on my D2 (up to 20 tons). Beyond those sorts of things, most Cat fasteners are 3/8 UNC bolts /nuts so you can go a long way with just a 9/16" wrench. I use the ratcheting combination wrench like you can get from Lowes and that makes undoing things very fast. There are some fasteners that Cat has hidden very well so you need long 1/4 extensions and 1/4 to 3/8 adapters and things like that but you'll figure that out as you go along. And some things just need triple jointed fingers : ) As always, just ask here if you get stuck. Someone inevitably knows the answer or an easy way to do something.