S 434-025
(7)
Connect the charging line to the top end of the accumulator.
S 434-026
(8)
Connect the hydraulic line to the lower union of the accumulator.
S 864-027
(9)
Pressurize the accumulator at the nitrogen charging valve
(AMM 12-15-04/301).
S 864-028
(10)
Supply power to the right hydraulic system (AMM 29-11-00/201).
S 864-029
(11)
After a minimum of 3 minutes, remove the pressure from the right hydraulic system (AMM 29-11-00/201).
S 214-030
(12)
Examine the accumulator for hydraulic leaks.
S 864-031
(13)
Fully push down and release the brakes a minimum of six times to bleed the accumulator.
E.
Put the Airplane Back to the Usual Condition
S 864-032
(1)
Pressurize the left and right hydraulic systems (AMM 29-11-00/201).
S 844-033
(2)
Set the parking brakes.
S 844-034
(3)
Remove the chocks from the wheels.
S 094-039
WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(4)
Remove the door locks from the landing gear doors and close the doors (AMM 32-00-15/201).
S 864-036
(5)
Remove the power from the right hydraulic system if it is not necessary (AMM 29-11-00/201).
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757 MAINTENANCE MANUAL
ACCUMULATOR ISOLATION VALVE - REMOVAL/INSTALLATION
__________________________________________________
1. General
_______
A. This procedure contains two tasks. The first task removes the accumulator isolation valve from the parking brake. The second task installs the accumulator isolation valve on the parking brake.
TASK 32-44-06-004-001
2. Remove the Accumulator Isolation Valve from the Parking Brake (Fig. 401)
_____________________________________________________________
A. Equipment
(1)
Landing Gear Door Locks, (AMM 32-00-15/201)
B.
References
(1)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(2)
AMM 32-00-15/201, Landing Gear Door Locks
(3)
AMM 32-00-20/201, Landing Gear Downlocks
(4)
AMM 32-44-00/001, Parking Brake System
C.
Access
(1)
Location Zones 144 Right Main Lainding Gear Wheel Well 211/212 Control Cabin
D.
Prepare to Remove the Accumulator Isolation Valve
S 494-002
(1) Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201)
S 494-034
WARNING: USE 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.
(2)
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
S 864-004
(3)
Remove the pressure from the right and left hydraulic systems and reservoirs (AMM 29-11-00/201).
(4)
Put the chocks below the wheels.
S 844-005
32-44-06
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757
MAINTENANCE MANUAL
PRESSURE VALVE
RIGHT WHEEL WELL
Accumulator Isolation Valve Installation
Figure 401
32-44-06
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757 MAINTENANCE MANUAL
E. Remove the Accumulator Isolation Valve
S 844-006
(1)
Release the parking brakes (AMM 32-44-00/501).
S 864-007
(2)
Push the brake pedals down fully seven times to remove the hydraulic pressure from the brake accumulator.
NOTE: There must be a miminum of 5 seconds between each time you
____
push down the brakes.
S 034-008
(3)
Disconnect the hydraulic lines from the isolation valve (Detail A).
S 034-009
(4)
Put a cap on the hydraulic lines.
S 014-010
(5) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 起落架 CHAPTER 32 - LANDING GEAR 3(67)
