After realizing I made a few mistakes with my recent fueling pad post I went looking for answers. Although I never worked on a F7 I thought some were used in passenger service but I guess not. None of the photos I looked at indicated they had a steam generator. I did work on E7's a few times and I thought the boiler water tank was upright in the rear of the engine but wrong again. After looking at an E7 manual at http://www.rr-fallenflags.org/manual/nyc-e7.html it was under the engine next to the fuel tank and according to the manual held 1600 gallons of water. I guess the only engine I truly know is the EMD FL9 only used by the Penn Central's Hudson, Harlem and New Haven lines. So if there's any questions about FL9's that any body wants to know I'll be glad to answer them. Finding an online E7 manual was a surprise though.