Don't get it hot. It's easy to crack a head. If you're working on a slope, overfill the transmission with 7 gallons to avoid a wild ride backwards. Blade brace pins and cotter pins can be purchased aftermarket. Pull your transmission screens and clean them. Change your filters, with emphasis on inner air filter, transmission filters, fuel filters (clean fuel filter screen) and final drive filters. They don't tend to get much love. Pull the fill plugs on the finals and stand back. If they don't shower you with oil, your duocone seals are intact. Changing the final drive fluid is cheap insurance. Prime the final drive pumps before using if you change the fluid so you don't damage the finals. Pull the floor and grease the u-joint. If it's damaged, replace it now before it gets any worse. Get an owner and service manual which explains all. Clean the radiator and belly pans when you get a chance. Eventually you should determine if your cross tube has been updated. The original hose design was changed because it would brake and spray burning oil on the operator. CAT will do the upgrade for free if you remove the cross tube and take it to them. I don't remember if they will do the R&R or not. These are some of the things that get overlooked in a normal service. If I think of others, I'll update.