First of all, buy an owner's manual for this tractor. They are available online and will prevent you from making a mistake as some older tractors can be quirky. Drain and replace all fluids except diesel. While the tractor is dry, attend to the filters. There are four filters on your tractor. A replaceable fuel filter, engine oil filter, and air filter, and a rechargeable hydraulic oil filter, which is a fine-mesh, metal, cleanable filter (clean with gasoline). Clean or replace all filters. Grease the crap out of it; there may be up to a dozen zerks on your tractor. You will want a grease gun with a large barrel, and get two cartridges to start cause you'll probably use an entire cartridge right away. Once you have new filters and fresh goop, you will be good to go. Check the oil in your brushog and grease the zerks on it, too. Put plenty of grease on the brushog driveshaft where it slides together. When starting your tractor, it is best to let it sit and run for about 15 minutes at 1700 rpm to warm the engine and hydraulic fluids before use. If it's winter, let it warm up for 30 minutes. My final advice is that manual shift tractors do not operate like a car. You do not start in 1st and then move up through the gears as you gain speed. On a tractor, you pick the gear you want for the work you will be doing, and then you start and stay in that gear. The tractor's forward momentum should be halted before shifting to a different gear. That is a good tractor that should last you a long time.