I use the n2 CaseIH high temp grease. I can't remember what the number is on it. This is what I will probably use. I was just wondering about synthetic grease in something that spins. Have the combine all torn apart in the shop, have not put torque sensor together yet. It is amazing how the dollars will add up when you really look at the machine. Best way I know how to check them over is to totally disassemble it to find the things that will give you trouble at harvest.
