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757 MAINTENANCE MANUAL
NOSE GEAR GEAR-OPERATED SEQUENCE VALVE - REMOVAL/INSTALLATION
_____________________________________________________________
1. General
_______
A. This procedure contains two tasks. The first task is for removal of the gear-operated sequence valve for the nose landing gear. The second task is for installation of the sequence valve.
TASK 32-34-06-004-001
2. Remove the Gear-Operated Sequence Valve (Fig. 401)
_______________________________________
A. 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
B.
Access
(1)
Location Zones
115 Nose Landing Gear Wheel Well (Left)
116 Nose Landing Gear Wheel Well (Right)
711 Nose Landing Gear
C.
Prepare for 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: 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 left hydraulic system and hydraulic reservoir (AMM 29-11-00/201).
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757
MAINTENANCE MANUAL
SEE A
BOLT WASHER (3 LOCATIONS)
SEQUENCE VALVE
HYDRAULIC FITTING (6 LOCATIONS)
BOLT
3.790
WASHERINCHES3.810
NUT
FITTING
LINK
BOLT WASHER (2 LOCATIONS) BUSHING NUT
ROD END LOCKING
DEVICE
CRANK
JAMNUT
NUT
WASHER
BOLT
A
Nose Landing Gear Gear-Operated Sequence Valve Installation
Figure 401
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D. Remove the Sequence Valve
S 034-005
(1)
Disconnect the hydraulic lines from the sequence valve.
S 494-006
(2)
Install caps on the ports and hoses.
S 034-007
(3)
Remove the bolt to disconnect the link from the fitting (Detail A).
S 024-008
(4)
Remove the 3 bolts to remove the sequence valve.
S 034-009
(5)
Remove the fitting from the sequence valve and keep for the installation of the new sequence valve.
TASK 32-34-06-404-010
3. Install the Gear-Operated Sequence Valve (Fig. 401)________________________________________
A. Equipment
(1)
Gear-Operated Sequence Valve Locating Fixture,
NLG - B32045-1
B.
Consumable Materials
(1)
A00247 Sealant, Chromate Type - BMS 5-95
(2)
D00153 Fluid, Hydraulic - BMS 3-11, Type IV
(3)
D00054 Lubricant, Hydraulic Systems - MCS 352
C.
References
(1)
AMM 12-12-01/301, Hydraulic Systems
(2)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(3)
AMM 32-00-15/201, Landing Gear Door Locks
(4)
AMM 32-34-00/501, Nose Gear Extension and Retraction
D.
Access
(1)
Location Zones
115 Nose Landing Gear Wheel Well (Left)
116 Nose Landing Gear Wheel Well (Right)
711 Nose Landing Gear
E.
Procedure
S 644-011
(1) If they are not installed, lightly lubricate the hydraulic fittings and packing with BMS 3-11 or MCS 352. Install them in the actuator ports (Detail A).
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本文链接地址：757 AMM 飞机维护手册 起落架 CHAPTER 32 - LANDING GEAR 2(88)
