I called to identify the oil but unfortunately I'm not Hispanic so struggled somewhat.
Sounded like Tractor Yellow Hydraulic and Transmission fluid, Part # G04011??. I think he said Super Tech but if he did I can't find the part number anywhere.
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
a hyd and trans mission fluid sounds like a utf fluid. if so.. probbaly ok, even if an older spec. if it was super tech.. that is walmart fluid, and is ok if utf.