Keep extra hand file hammer wrenches etc. in your tool box and stick make objects also be twice as careful when cutting around old fence line.
Check out equipment auction ask some folks for there thoughts.
Talking about a sickle bar mower main points to check
Is the sickle bar straight not twisted how badly are the sickles broken bent is the ball worn where the pitman arm attaches the long slot that the sickle bar slides into is smooth you should be able to move the bar back an forth by hand
Couple of years ago, I found a JD #9W. It needed a few new guards and sections. It cut OK. After replacing all the sections, it cut just fine. Also found a #9, same as the 9W, just not offset as much. Last spring I replaced all the guards and sections on one cutter bar, it cuts MUCH better. Now I've got a complete spare cutting bar/knife and pitman assembly. Sickle bar mowers are a chore to initially set-up and adjust, but after that, the maintenance is fairly easy.
Kubota R510 Wheel Loader + Cab and backhoe, JD 6200 Open Station, Cushman 6150, 4x4, ten foot 56 hp Kubota diesel hydraulic wing mower, Steiner 430 Diesel Max, Kawasaki Diesel Mule, JD 4x2 Electric Gator
Yeah, you want a belt driven one. I looked into it years ago. Shop carefully. One popular unit was called the family something, because apparently it took the whole family to put it on. Not something I would be interested in. I finally bought a hydraulic one, but it's more for trimming than haying or field cutting.