CREW CONTROLS AND INDICATORS - Continued
Backup Hydraulic Controls - Continued
Circuit Dump Valve
Opening this valve "dumps hydraulic
pressure generated by manual hydrau-
When valve is open, backup hydraulic
pump is disengaged from main engine.
Valve must be closed when activating
backup hydraulic circuit.
Turning valve knob clockwise closes
valve. Counterclockwise rotation
Backup Hydraulic System
Selects between primary pump circuit and
backup pump circuit operability.
When valve handle is pushed in, primary
pump and circuit are operable. When
valve handle is pulled out, backup hy-
draulic pump and circuit may be oper-