Do you have that manual section for a 630? Up to Torque Tube, Section F I think binder is in the other room, is as far as and can fin. Joe Young, 630crazy and I have hashed this over several times and we wondered since 630 was made only 4 years that they never finished service books. Says on the cover of Section A to look at 500b/600b books until all sections were available. These tractors have a different steering set up than the 30 series AND the 30 series didn't stay consistent through the model years either according to parts book.If you have 530 or 630 book with that view please post or send to my e-mail, it is open. My gasser 630 has a pump and reservoir set up like your diesel, but the suction hose has to weave through the distributor/coil area and nearly kinks the way I have it run. If there is a better way I would like to do that short of using 4' of hose, putting and ell and short nipple out of the reservoir base, etc.
How's things going, better I hope.