What are the relative positions of the two pumps around the central shaft?
They are both on roughly the same side
Where is the shaft supported (including above the spiral bevel set)?
You can just about make out the machined bits where the bearings go, below and above the bevel
Is a range of different lubricants specified?
Yes, a modest range
What is the normal range of lubricant operating temperature?
Mid 80s C at max continuous power
Are the pump gears changed at the same time as the shaft?
Dunno! But shaft is lifed at 20,000 hrs I think
Is there only one type of pump on EC225?
yes, I think so ( if you mean MGB oil pump)
Sorry. I'm really nosey when it comes to gears.