757 AMM 飞机维护手册 液压 CHAPTER 29 - HYDRAULIC POWER 1(20)

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 A.  The ACMP modules filter both pressure and case drain fluid from the ACMP's. The left and right system return modules are in the left and right wheel well forward fairings, respectively. The center system module is in the aft left wing/body fairing.
 B.  Left and Right System Modules
 (1)  
Each module includes two throw-away filters. Differential pressure indicators show when each filter is blocked. A spring-loaded valve at each filter prevents fluid draining when the filter element is removed. Each module also has a pump pressure switch and two check valves.

 C.  
Center System Module

 (1)  
The center system filter module is a dual unit which filters fluid from two ACMP's. This module is the same as two left or right system modules installed in one housing. The center system module also has a system pressure switch.

 9.  EDP Supply Shutoff Valve (Fig. 10)
________________________
 A.  The supply shutoff valve controls fluid supply to the EDP and is normally in the open position. The valve is operated by a 28 volt dc motor which is controlled by the engine fire switch. A position indicator on the valve provides a valve CLOSED or OPEN indication. The valve is installed in the EDP supply line in the engine strut.
 10. Isolated ACMP Shutoff Valves (Fig. 10)
____________________________
 A.  Two valves provide a reserve hydraulic system to power normal brakes in the event of loss of the right and left hydraulic systems. These valves consist of a supply and a pressure shutoff valve. Each valve is operated by a 28 volt dc motor.
 B.  The right system ACMP normally draws fluid from the reservoir through a standpipe. When the shutoff valves are activated, the supply shutoff valve provides fluid to the right ACMP from the bottom of the reservoir. The pressure shutoff valve isolates the output of the right ACMP to power only the normal brakes.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

R SYSTEM ISOLATEDACMP PRESSURE SHUTOFF VALVE
VALVE POSITION VALVE
INDICATOR R SYSTEM ISOLATED ACTUATOR
(REF) ACMP SUPPLY MOTOR VALVE SHUTOFF VALVE (REF) ACTUATOR MOTOR (REF)
SELF-SEALING DISCONNECT
FWD
RIGHT SYSTEM ISOLATED ACMP PRESSURE SHUTOFF VALVE
FWD
RIGHT SYSTEM ISOLATED ACMP SUPPLY SHUTOFF VALVE
SUPPORT
LINE TO PUMP BRACKET
LINE FROM RESERVOIR
VALVE 
FWD  CONNECTOR ELECTRICAL  INDICATOR POSITION 
　
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