Thank you very much for the MGB illustration Wobblybob. Very enlightening.
So, the pump drive is on a short and very substantial shaft (with a high natural frequency presumably). The pumps are driven from independent gears. The general pattern is that ordinary gear sets are helical/spiral except for epicyclic sets AND the pump gears.
What are the relative positions of the two pumps around the central shaft?
Where is the shaft supported (including above the spiral bevel set)?
Is a range of different lubricants specified?
What is the normal range of lubricant operating temperature?
Are the pump gears changed at the same time as the shaft?
Is there only one type of pump on EC225?
Sorry. I'm really nosey when it comes to gears.
Last edited by jimf671; 19th Nov 2012 at 20:09.