0n30 Tankcar

[Hobojohn]

Bachmann makes beautiful 0n30 tankcars.
But how were these cars used/filled in real life? Through the '90 degree' funnel attached to the side of the big 'bump' on top of the tank?
Is that also the place where the oily 'spillings' occur?
How were they emptied?

Thanks for your replies!
John Baron
The Netherlands.

[Ken]

  John
 
  A hatch on the top of the dome was opened for filling, spillage resulted usually from overfilling of car . Dome was used as outage, a place for expansion   to take place of the product if it warmed up in transist.

   Side piping elbow had a relief valve in case of over pressuring of the
car contents.

   A drain valve on the bottom of the car was used to empty the contents
to storage, either by gravity or pumping. Filling hatch would be opened to
prevent a vacumm from collapsing tank.

    Ken Clark
       GWN