Has it ever worked? If yes what did you do between when it worked and now it doesn’t? Do any functions work or try to work?
some models of tractors have a selector valve for directing oil either to front loader or rear valves and or 3 point hitch. Does this model have that feature?
Does the three point work at all? Do you by chance have your three point lever in the full up position? If so, the loader may work slowly or not at all. Check the hydraulic fluid level.