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A
757 MAINTENANCE MANUAL
P11 PANELP5 PANEL
LEFT WHEEL
WELL RIGHT WHEEL
SEE A C WELL SEE GENERATOR FIELD AND HYDRAULIC
CONTROL PANEL
SEE B
FLIGHT DECK
POWER TRANSFER
UNIT
SEE D PTU PRESSURE
FILTER MODULE
SEE E
PTU MANUAL CONTROL SWITCH
PTUGEN FIELD MANUAL RESET
www ON OUTBD
FIELD FIELD FIELD OFFw OFFw OFFw OFF
L R APU FLT CONTROL SHUTOFF
ON ON ON
FWD
www
OFF OFF OFF
aaa
LEFT WHEEL WELL
LC R
A
GND USE ONLY
GENERATOR FIELD AND HYDRAULIC CONTROL PANEL
B
Power Transfer Unit (PTU) System Figure 501 (Sheet 1)
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A
757
MAINTENANCE MANUAL
PTU CONTROL VALVE
SEE F
OUTBD
FWD
RIGHT WHEEL WELL
FWD
C POWER TRANSFER UNIT D
MANUAL LEVER/POSITION INDICATOR
PTU CONTROL PRESSURE SWITCH
PTU CONTROL VALVE
ELECTRICAL
CONNECTOR
ELECTRICAL CONNECTOR
PTU PRESSURE FILTER MODULE PTU CONTROL VALVE EF
Power Transfer Unit (PTU) System
Figure 501 (Sheet 2)
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757
MAINTENANCE MANUAL
S 015-004
WARNING: DO THE PROCEDURE IN AMM 32-00-15/201 TO INSTALL THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3) Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
S 215-005
CAUTION: DO NOT OPERATE THE HYDRAULIC PUMPS WITHOUT A MINIMUM QUANTITY
_______ OF FUEL IN THE TANKS OR AFTER THE OVERHEAT LIGHT COMES ON. IF THE HEAT EXCHANGERS OF THE HYDRAULIC SYSTEM ARE NOT FULLY INTO THE FUEL, THE HYDRAULIC FLUID CAN BECOME TOO HOT.
(4)
Make sure the left and right main fuel tanks each contain 600 gallons (4020 pounds/1827 kilograms) of fuel.
S 865-007
(5)
Push the ELEC/HYD switch on the EICAS maintenance panel on the right side panel, P61.
F.
Do the Operational Test of the PTU, the PTU Control Valve, and the Auto Control and Indicating System
S 865-348
CAUTION: DO NOT APPLY HYDRAULIC POWER WITHOUT REMOVING THE PITOT, ANGLE
_______ OF ATTACK, AND ENGINE PITOT COVERS. THE HEATERS CAN MELT THE COVERS AND CAUSE AIRPLANE DAMAGE.
(1)
Make sure the pitot, angle of attack, and the engine pitot covers are removed prior to applying hydraulic power.
S 865-010
(2)
Pressurize the right hydraulic system with either a hydraulic service cart, engine-driven pump, or alternating current motor pump (AMM 29-11-00/201).
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本文鏈接地址：757 AMM 飛機維護手冊 液壓 CHAPTER 29 - HYDRAULIC POWER 2(125)
