RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
Before i spun the stump jumper / blade carrier back on.. I'd look over the nut and shaft, and threads / splines & hub to look for wear.. If the nut has -0- wear on it.. I'd re-use it.. otherwise get a new nut if it looks the least bit worn.