Figure 76. Primary and Utility Hydraulic System Block Diagram

SECTION II. THEORY OF OPERATION - TM-1-1520-238-T-5_039

Figure 77. Primary Hydraulic System Functional Diagram

TM-1-1520-238-T-5 Army Model AH-64 Helicopter (NSN
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TM 1-1520-238-T-5 Change 6 7–21 7–7. SYSTEM DESCRIPTION (cont) 7–7 PRIMARY MANIFOLD PRIMARY HYDRAULIC PUMP HAND PUMP UTILITY MANIFOLD UTILITY GSE PANEL GAS RESERVOIR UTILITY ACCUMULATOR APU START MOTOR UTILITY HYDRAULIC PUMP PRESSURE RETURN ROTOR BRAKE COLLECTIVE SERVOCYLINDER DIRECTIONAL SERVOCYLINDER LONGITUDINAL SERVOCYLINDER LATERAL SERVOCYLINDER PRESSURE RETURN PRIMARY GSE PANEL CONTROL VALVE TAIL WHEEL LOCK M68-191A RETURN SHUTOFF VALVE PRESSURE LEGEND NITROGEN ADF PRIMARY ADG FILTER Figure 7–6. Primary and Utility Hydraulic System Block Diagram

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