I'm not sure about this tractor, but most you can loosen fuel line where it goes into injector at the cylinder head.
Loosen for each injector then crank engine till you have fuel running out of each one, (be ready to catch fuel as it will make mess)
Tighten injector lines and try starting.
Some tractors have a pump so you don't need to crank engine, just make sure you have a good flow.
You will need to have key on if using hand pump.
You can just do one at a time and if it starts that's fine, if running rough open each line till good flow at each injector, the engine should smooth out and run fine.
Good luck !
