S 864-027
(15)
Push the RESERVE BKS & STRG switch on the P1 panel.
S 214-028
(16)
Make sure the position indicator on the shutoff valve moves to the OPEN position.
S 114-029
CAUTION: QUICKLY CLEAN THE INSTALLATION AREA OF ALL HYDRAULIC FLUID.
_______ HYDRAULIC FLUID CAN CAUSE DAMAGE TO THE AIRPLANE EQUIPMENT.
(17) Clean all hydraulic fluid from the installation area (AMM 12-25-01/301).
S 094-030
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.
(18) Remove door locks from the landing gear doors and close the doors (AMM 32-00-15/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 864-031
(19)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
S 864-032
(20)
Remove hydraulic power if it is not necessary (AMM 29-11-00/201).
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29-11-28
ALL ú ú 01 Page 405 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
LEFT AND RIGHT SYSTEM RELIEF VALVE - REMOVAL/INSTALLATION
_________________________________________________________
1. General
_______
A. This procedure has two tasks. One task removes the relief valve for the left and right system. The other task installs the relief valve.
TASK 29-11-29-004-001
2. Remove the Relief Valve (Fig. 401)
_______________________
A. References
(1)
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
(2)
AMM 32-00-15/201, Main Gear Door Locks
(3)
AMM 32-00-20/201, Landing Gear Downlocks
B. Access
(1) Location Zones
143/144 MLG Wheel Well
C. Prepare for the Removal
S 494-002
(1) 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)
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
S 864-004
(3)
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11K16, HYDRAULICS ELEC PUMP RIGHT
(b)
11K25, HYDRAULICS ELEC PUMP LEFT
S 864-005
(4) Remove the pressure from the applicable hydraulic system and the reservoir (AMM 29-11-00/201).
D. Remove the Relief Valve
S 034-006
(1) Remove the hydraulic lines from the relief valve.
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