Detail of the stages's J-2 engine gimbal fitting (center, where the engine's
would attach to the thrust structure) and the stage's LOX feed line and duct
(lower) and LH2 feed line and duct (upper).
It appears that the engine was not removed from the stage in an orderly
fashion, as the top half of the engine's LOX and LH2
ducts were still attached to the stage's feed lines.
This photo dates to late 2005. Also note the cylindrical hydraulic system
accumulator-reservoir (diagonal at top, left of center) and the main hydraulic
pump immediately below it.. Prior to Barack Obama cancelling
the Constellation Program, MSFC engineers removed
some components from this S-IVB stage for study. All of the components
mentioned here appear to have been among those removed, as my next photos (from
2006) show that these components had been removed.