TM 9-2350-267-10CREW CONTROLS AND INDICATORS - ContinuedBackup Hydraulic Controls - Continued2-8Backup HydraulicCircuit Dump ValveOpening this valve "dumps” hydraulicpressure generated by manual hydrau-lic pump.When valve is open, backup hydraulicpump is disengaged from main engine.Valve must be closed when activatingbackup hydraulic circuit.Turning valve knob clockwise closesvalve. Counterclockwise rotationopens valve.Backup Hydraulic SystemSelector ValveSelects between primary pump circuit andbackup pump circuit operability.When valve handle is pushed in, primarypump and circuit are operable. Whenvalve handle is pulled out, backup hy-draulic pump and circuit may be oper-ated.
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