TM 1-1520-238-T-5 7–22 Change 6 7–7. SYSTEM DESCRIPTION (cont) 7–7 DIRECTIONAL PRESS LONGITUDINAL SERVOCYLINDER PRIMARY HYDRAULIC MANIFOLD M68-105B OVBD PRESSURE SUCTION PUMP PUMP PRESSURE RETURN RETURN GSE PRESSURE GSE INDICATORS FILTER DIRTY FILTER RESERVOIR DRAIN CASE PRESSURE SUCTION FILTER RTN PUMP PRIMARY PRESS SW LOW LVL SW PUMP HAND PRIMARY SERVOCYLINDER PRESS TRANSDUCER COLLECTIVE SERVOCYLINDER LATERAL SERVOCYLINDER IN OUT HEAT EXCHANGER/ EDUCATOR FLUID FILL PRESSURE RETURN + PRESSURE (3000 PSI) RETURN (35 PSI) LEGEND FILTER ADF PRIMARY ADG FILTER Figure 7–7. Primary Hydraulic System Functional Diagram PRESSURE (3000 PSI) RETURN (35 PSI) TRANSDUCER PRESSURE SERVOCYLINDERS TO FLIGHT CONTROL GSE PRESSURE PORT GSE RETURN PORT ISOLATION VALVE GSE RETURN SERVOCYLINDERS FROM FLIGHT CONTROL TO PUMP SUCTION RELIEF VALVE PISTON LOW PRESSURE INDICATOR DIRTY FILTER VALVE AIR BLEED INDICATOR AIR INLET FLUID LEVEL CHECK VALVE RELIEF VALVE FILTER SWITCH LOW LEVEL RESERVOIR DRAIN PORT BYPASS VALVE RETURN HIGH PRESSURE INDICATOR DIRTY FILTER PUMP FROM M68-106 PRESSURE SWITCH FILTER PRESSURE VALVE GSE CHECK LEGEND Figure 7–8. Primary Hydraulic Manifold Normal Operation Functional Diagram