That looks like hydraulic fluid not tractor fluid. You want tractor fluid. It has additives that make it work well with wet clutches and brakes.
Chevron makes a synthetic version of THF1000 which has better low temp viscosity. than the regular stuff
The Lucas website says it's for transmissions also, but the more I look at it the less convinced I am. I'll have to verify with them exactly what's in it before I purchase any.
That Chevron All Weather THF looks great but it seems like it's a bit difficult to come by.
While searching for that I also found some other interesting looking synthetic options:
Schaeffer's 315 Simplex Supreme
AMSOIL Synthetic Tractor Hydraulic/Transmission Oil