A warning about that engine in that kind of tractor. If you have rust in the cooling system, and ever have occasion to drain the system to prevent freezing, be aware the the common drain connecting the radiator drain to the block drain is not trustworthy. The block drain can become clogged and when you think you have drained it, the block is not necessarily drained. This is what happened to my 7274. I believed I had drained it but was wrong. It froze and cracked the block. The CC dealer told me I now had "a paperweight." That was the last year for that engine design. It's a good engine design, and a crappy drain design. Knowing what I know now, I would get rid of the common drain and put a regular drain valve on the block, so I could be sure it was draining. I have a heck of a nice $16,000 paperweight. With all the extras when it died, I could say it was a $25,000 paperweight.
PS: Check the frame bolts on the sides and front of the engine often, put in new lock washers, and LockTite the bolts! That's how my troubles began. When they get loose, the moving frame racks the radiator side to side in a parallelogram type motion. That is how my radiator got full of leaks. The leaks are why I was running water in the system, instead of antifreeze. The loosening bolts are a common trouble with all the 72** series CCs (I learned too late on forums like this), even with the later design engines. On the 727*s with the K3M engine, there are four on each side, and two bolts and two studs on the front of the engine that are quite hard to get to, or see. They are inside the frame rails and just aft of the sheet metal guard below the radiator. These on the front are the most important. If you have an FEL, the bolts all work much harder, and will loosen faster.
