After looking for a few hours on the internet
I did download a maual for the pump.
It's about 20Mb and explains pumps with mechanical and hydraulic governers.
I'm not sure where I found the manual on the net. I ahve looked for it again on the Web but can't find it, so I can't send you the link for it.
I just overhauled the injector pump
on my Formosa
41, Perkins 4.108
and it was pretty easy to do yourself. It took about 4 hours.
Send me your e-mail adress and I'll send you the manaul.
I just hope this site notifies you of my e-mail address?