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29-11-24
ALL ú ú 01 Page 407 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
RESERVOIR DEPRESSURIZATION VALVE - REMOVAL/INSTALLATION
_______________________________________________________
1. General
_______
A. This procedure has two tasks. One task removes the valve which removes the pressure from the reservoir in the left, right, or center hydraulic system. The other task installs the valve.
TASK 29-11-25-004-001
2. Remove the Valve (Fig. 401)
________________
A. References
(1)
AMM 06-41-00/201, Fuselage Access Doors and Panels
(2)
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
(3)
AMM 32-00-15/201, Landing Gear Door Locks
(4)
AMM 32-00-20/201, Landing Gear Downlocks
B. Access
(1)
Location Zone
143/144 MLG Wheel Well
197 Wing to Body - Lower Half (Left)
(2)
Access Panels
197KL Central Hydraulic Service Center
C. Procedure
S 494-002
(1) For the left or right hydraulic system, make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
S 494-003
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.
(2)
For the left or right hydraulic system, open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
S 014-004
(3)
For the center hydraulic system, open the access panel, 197KL, for the central hydraulic service center (AMM 06-41-00/201).
S 864-005
(4)
Remove the pressure from the applicable hydraulic system and the reservoir (AMM 29-11-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-25
ALL ú ú 01 Page 401 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
1. DEPRESSURIZATION
HYDRAULIC RESERVOIR
VALVE
SEE A
SEE B
FWDRESERVOIR
1. DEPRESSURIZATION
VALVE
HYDRAULIC RESERVOIR
RESERVOIR BACKUP
(EXAMPLE)
NUT
A
2.
NUT
3.
WASHER
8. O-RING
PNEUMATIC LINE
4. BRACKET
5.
BOLT
6.
WASHER (2)
7.
NUT (2 LOCATIONS)
DEPRESSURIZATION VALVE
B
Depressurization Valve Installation Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-25
ALL ú ú 01 Page 402 ú Dec 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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