HYDRAULICELBOW RESERVOIR
SEE ATUBE CLAMP
SCREW
WASHER (QTY 2)
RESERVOIR NUTRELIEF VALVE
A FWD
A A
BRACKET
A
HYDRAULIC
VENT PORT
RESERVOIR
ON THE
HYDRAULIC
RESERVOIR
HYDRAULIC RESERVOIR BACKUP RING
O-RING
A
THE ELBOW OR THE END
OF THE RESERVOIR RELIEF
VALVE THAT HAS A THREAD
THE HEXAGONAL END OF THE RELIEF VALVE ORTHE RESERVOIR VENT PORT THE JAMNUT ON THEOR THE VALVE OUTLET PORT (EXAMPLE) ELBOW FITTING
OF THE RESERVOIR RELIEF
VALVE
A-A
Reservoir Pressure Relief Valve Installation Figure 401
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29-17-07
ALL ú ú 01 Page 402 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 034-005
(4) Disconnect the reservoir vent tube from the valve for pressure relief.
NOTE: Let the air pressure in the reservoir decrease to zero before
____ you fully remove the reservoir vent tube.
S 034-006
(5)
Remove the clamp which attaches the valve to the bracket.
S 024-007
(6)
Remove the valve from the vent port on the hydraulic reservoir.
S 034-008
(7)
Remove the O-ring and the backup ring from the valve.
TASK 29-17-07-404-009
3. Reservoir Pressure Relief Valve Installation (Fig. 401)
____________________________________________
A. Consumable Materials
(1)
D00153 Fluid - Hydraulic, Fire Resistant, BMS 3-11
(2)
G00095 Detector - Leak, Leak-Tek (160X)
B.
References
(1)
AMM 36-00-00/201, Pressurize/Depressurize Pneumatic System
(2)
AMM 54-62-00/201, Nacelle Strut Access Panels
(3)
AMM 54-62-02/501, Nacelle Strut Access Doors
C.
Access
(1)
Location Zone
454 System 1 - Strut Aft Fairing
464 System 2 - Strut Aft Fairing
474 System 3 - Strut Aft Fairing
484 System 4 - Strut Aft Fairing
(2)
Access Panel
454AL Trailing Edge Fairing Doors - System 1
464AL Trailing Edge Fairing Doors - System 2
474AL Trailing Edge Fairing Doors - System 3
484AL Trailing Edge Fairing Doors - System 4
D.
Procedure
S 644-010
(1)
Lubricate the O-ring, the backup ring, and the threads with hydraulic fluid.
S 434-011
(2)
Install the O-ring and the backup ring on the valve for pressure relief.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-17-07
ALL ú ú 03 Page 403 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 424-012
(3) Install the valve in the vent port of the hydraulic reservoir.
S 434-013
(4) Install the clamp on the valve.
S 434-020
(5) Attach the tube clamp to the bracket with the screw, the two
washers, and the nut.
S 434-014
(6) Connect the reservoir vent tube to the valve.
S 794-015
(7) Put the leak detector on all connections.
S 864-016
(8) Pressurize the pneumatic system (AMM 36-00-00/201).
S 794-017
(9) Examine all of the connections on the valve for leaks.
NOTE:____ Leakage which does not have a concentration is permitted.
S 364-021
(10)
If you find a concentration of leakage, repair the cause of the leak.
S 214-018
(11)
Examine the door latches on the trailing edge fairing for cracks and wear.
S 214-022
(12)
Make sure all latches are there.
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