Maciek
Your remark that in general the electric motor is placed vertically above machines particulary pumps, is of course correct and the reason you assumed, to prevent leakages down to the motor is rigth. However there are exceptions as for the aux. lubeoilpump, where the pump and motor are mounted horizontally on a common bedplate. The present days Westfalia lubeoil purifier has the motor horizontally and the purifier vertically mounted on a common bedplate. I simply cannot remember the execution of the VIIC purifier, if it was fitted for space reason vertically, I would imagine the emotor had to be underneath which is as you pointed out a bad solution, but not impossible, but I`ll give the present days Westfalia execution a 65% chance. Let`s see if somebody can dig up a correct picture
Tore