FIRST RECHARGE STAGE FLUID FLOW PATTERN TRAVEL CUSHION AIR TANK VALVE PRV HIGH PRESSURE AIR SOLENOID (TYPICAL) DEPRESSURIZED PRESSURIZED DEPRESSURIZATION PISTON RETRACTING RETURN SPRINGS HYDRAULIC FLUID DEPRESSURIZED HYDRAULIC FLUID PRESSURIZED DIAMOND-SHAPED ACTUATOR (DSA) AT ALMOST MINIMUM VOLUME DISPLACEMENT PISTON (DP) AT ALMOST MAXIMUM VOLUME The cushion tank is isolated while maintaining its pressure. The return springs at the DSA and the DEPRESSURIZATION PISTON's spring retract causing their fluid gain to return to the DP. The return springs have pulled the DSA back to minimum fluid volume when depressurized. 15.340 The DEPRESSURIZATION PISTON, which has a low pressure range return spring, is opened to the common fluid of the DSA and the DP, which depressurizes the fluid coloured purple. This eliminates the DSA's force advantage. 1% of the DP's initial fluid is still in the cushion tank. See page 13.256 in the APS training manual for full details.
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