I ran out of diesel fluid on my tractor. I was told I would have to bleed the lines. Can you tell me how I do that?

Is there a manual pump for the fuel. Can you get fuel to reach the injector pump ?

Bleeding the injectors usually requires cracking the lines open one at a time where it meets the injector. That way you bleed the air out under pressure. You do this either when cranking the engine or with it running.