D2 5U Water Pump Question

Hey all, hoping someone has some insight for me. My D2, serial 5U 17116, needs the water pump seal replaced as it's leaking. I do not have a copy of the service book and it appears none is on the forum Library either. I have a copy of the D4 7U service manual and it says you can remove the water pump without pulling the radiator, but looking at my D2 it appears the water pump has a long stud that would necessitate pulling the radiator to pull the pump forward off that stud? Am I on the right track there, as I do not really want to pull the radiator off if it's not necessary.

Thanks - Anthony

The earlier d2 you had to removed the radiator for remove the water pump but no need the later one

Cat engineers in that era did not believe in giving any more room than was needed. In many cases less than an 1/8 of an inch of clearance. The Service Mans Reference book also expects a level of knowledge that many of us are struggling to gain. Not having a D2 or working on one I cannot say how clear the book might be, on the small details.