Kubota B6000 injector pump problem

[KerrieB]

I have a Kubota B6000 4WD.. cute little thing .. the injector pump needs adjusting and I cannot find where I can get a workshop manual or specs on how to correctly adjust the pump.. I can adjust it and it will run on 1 cylinder.. I can readjust and it will run on the other cylinder.. but cannot find the correct adjustment details to run on both cylinders at once.
Thanks in advance