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View of the LR-105's turbomachinery. The turbopumps are mounted at top right, with the axis of the pumps parallel to the thrust chamber (most other engines of the time, such as the H-1 and S-3D mounted their turbopumps so that the axis of the pumps were perpendicular to the thrust chamber).

Picture 1 of 2.

It would appear that the LOX pump is mounted on top. Also note the heat exchanger (the bellows at the bottom of this photo) below the turbine (the darker grey component).