If you are doing your own 50hr service, don't stop with just fluid and filter changes. This is a good time to get into the habit of crawling under the tractor to check bolts, missed zerks, tire pressure and of course the front axle fluid change (I don't recall right now if that is a 50hr or later change).
I note that you were asking about grease. I would hope that you have been greasing regularly during the past 50 hours, especially the loader. Any kind of grease is better than none. I use a moly/lithium type from TSC but I think none of the fittings on a CUT really require anything but the simplest grease. No NASA type tolerances or forces involved. There are a dozen or so zerks on the tractor itself (guesstimate) and at least that many on the loader. I grease everything about every 8 hours of engine time. Again, a few of the zerks require getting on the ground so don't forget those. Also, if you don't have experience with zerks, get used to the feel of grease going in properly (wait for it to come out around the pins on the loader for example). That can be helpful in determining if a zerk is not taking grease. I use one of the oil injector zerk cleaners but others simply remove the zerk and clean it when it malfunctions. Get used to assessing when that happens so you don't accidently run pins dry.
The Kioti service manual is EXCELLENT. Best I've ever seen and aimed at the non professional owner/operator. Great explanations, diagrams and step by step diagnostics and disassembly/assembly instructions. Cost is somewhere in the range of $70-80 at least it was a few years ago. Even at twice that price it is a must have IMO.
