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Detail of the upper portion of the forward end of the engine.

At the top of this photo is the LOX turbopump. Directly under the LOX TP are the two accessory drive adapters; the one at left has the main hydraulic pump mounted on it and the one at right has a circular, white closure. Leaving the LOX turbopump at right is the LOX high-pressure duct.

Below and to the left of the main hydraulic pump is the fuel additive blender unit (FABU) in its red heater assembly. Directly below that is the dark grey auxiliary hydraulic pump.