AIRPLANES WITH HYDRAULIC MOTOR-DRIVEN GENERATORS.
Hydraulic System Block Diagram Figure 1
K63704
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
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MAINTENANCE MANUAL
MOISTURE
VENT TRAP
CHARGING
VALVE
MOISTURE
VENT TRAP
GA
RES
FROMINA
VENTPNEUSYSTEM VENT T DEPRESSURIZATIONVALVE MODULE
DEPRESSURIZATIONBLD
VALVE MODULEDEPRESSURIZATIONMOISTUREVALVE MODULE VENT TRAP RESERVOIRPRESSURIZATION
SYSTEM R
RETURN
MODULE
SYSTEM R VENT
RESERVOIR
RESERVOIR
SYSTEM L
RETURN
SYSTEM CRESERVOIR RETURNSYSTEM C
SYSTEM L
RETURN HEATEXCHANGER
HEAT
EXCHANGER
TO ALT
HEATTO PTU GEAR EXTEND EXCHANGER RESERVOIRFILL SELM VALVE
ACMPM
R AC
EDPACMPACMPM
R 12 AC RAT
MOTORMOTOR
PUMP EDP
HAND PUMP
PUMPS
ACMP
ENGINEL
M
L
DRIVENTURBINERAM AIR
PUMP DRIVENENGINE
PUMP
DRIVEN
AC
MOTOR
NORMAL
PUMP
GROUND
PUMP BRAKES
RAT
SERVICE
DISCONNECT
RETRACTION GROUNDSERVICEDISCONNECTSPOILERS
GROUND
SERVICE
DISCONNECT
AILERONS &
AUTO PILOT
ROLL
AUTO PILOTL ELEVATOR
R ELEVATORS RUDDER STAB TRIMPITCH &
THRUST FEEL
ROLL OUTREVERSER
ALTERNATE
LEADING EDGETRAILING EDGE
BRAKES
SLATS FLAPS
FROM
L RESERVOIR
RUDDER RATIO
NOSE GEAR LANDING GEARYAW DAMPER CHANGER
STEERING ACTUATION
POWER
TRANSFER UNIT
SUPPLY PRESSURE
1 AIRPLANES WITH HYDRAULIC
1
HYDRAULICHYDHYD
MOTOR-DRIVEN GENERATORS.
MOTOR DRIVENRETURN AIR
PUMP
MOTOR
GENERATOR
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Hydraulic System Schematic
Figure 2
K63725
A
757
MAINTENANCE MANUAL
B. The power transfer unit (PTU) in the left wheel well operates if power is lost in the left engine or if left EDP output pressure is low. The PTU can also be switched on manually. The PTU consists of a hydraulic motor connected to a hydraulic pump. The motor is driven by right hydraulic system pressure and the pump supplies pressure to the left system. There is no fluid interchange between the right and left hydraulic systems. Left system pressure supplied by the PTU operates the following systems: 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：757 AMM 飛機維護手冊 液壓 CHAPTER 29 - HYDRAULIC POWER 1(8)
