Originally Posted by Aircraft Maintenance Manual 29.13.00 page 1
The Yellow electric pump is in the Yellow hydraulic compartment. It supplies the Yellow main system with hydraulic power when necessary (failure of the engine or engine pump). It is set to on from the flight compartment. It also starts when the aircraft is on the ground and a selection is made to operate the cargo doors.
It is not meant to replace/amend your ABN/EMER PROC but if you really need that pump, you can use it!
Originally Posted by Aircraft Maintenance Manual 29.24.00 page 5
Y ELEC Pump Performance:
- displacement = 4.3 ml/rev.
- delivery pressure at zero flow = 206 + 3 - 0 bar (2987 + 43.5 - 0 psi)
- delivery pressure at 23 l/min (6.08 US gal/min) = 196 bar (2842 psi)
- delivery pressure at 32 l/min (8.45 US gal/min) = 150 bar (2175 psi)