757 MAINTENANCE MANUAL
NOSE GEAR DOOR SAFETY VALVE - REMOVAL/INSTALLATION
__________________________________________________
1. General_______
A. This procedure contains two tasks. The first task removes the door safety valve for the nose landing gear. The second task installs the door safety valve.
TASK 32-35-23-004-001
2. Remove the Door Safety Valve for the Nose Landing Gear (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 NLG Wheel Well (Left)
116 NLG Wheel Well (Right)
211 Control Cabin (Left)
212 Control Cabin (Right)
711 Nose Landing Gear (NLG)
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 864-003
(2)
Remove the pressure from the left hydraulic system and hydraulic reservoir (AMM 29-11-00/201).
S 864-004
WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3) Open the doors for the nose landing gear (AMM 32-00-15/201).
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MAINTENANCE MANUAL
SEE A THE BOLT THAT ATTACHES THE VALVESAFETY VALVE TO THE BRACKETCONTROL ROD (4 LOCATIONS)
DOOR SAFETY VALVE
(SHOWN IN THE 'ON' POSITION)
A
A
LEVER
LATCH FWD
INBD
LEVER
DOOR RELEASE INTERLOCK ACTUATOR WASHER WASHER
A
BOLT
NUT CONTROL ROD
BUSHING
A-A
Nose Landing Gear Door Safety Valve Installation
Figure 401
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D. Procedure to Remove the Door Safety Valve
S 034-006
(1)
Remove the bolt to disconnect the rod from the lever (View A-A).
S 034-007
(2)
Disconnect the hydraulic lines from the valve.
S 494-008
(3)
Install plugs in the hydraulic lines and fittings.
S 024-009
(4)
Remove the bolts that attach the valve to the wheel well wall, and remove the valve.
TASK 32-35-23-404-010
3. Install the Door Safety Valve for the Nose Landing Gear (Fig. 401)
_______________________________________________________
A. Consumable Materials
(1)
D00153 Fluid, Hydraulic - BMS 3-11, Type IV
B.
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 32-35-00/501, Landing Gear Alternate Extension
C.
Access
(1)
Location Zones
115 NLG Wheel Well (Left)
116 NLG Wheel Well (Right)
211 Control Cabin (Left)
212 Control Cabin (Right)
711 Nose Landing Gear (NLG)
D.
Procedure
S 424-011
(1) Install the bolts and washers to connect the valve to the wheel well wall (Detail B).
NOTE: Install the washers with the countersink to the head of the
____
bolts.
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S 864-012
(2) Make sure the pressure is removed from the left hydraulic system and
reservoir (AMM 29-11-00/201).
S 434-013
(3) Connect the hydraulic lines to the valve.
S 434-014
(4) Install the bolt, washers, bushing, and nut to connect the rod to
the lever (View A-A).
NOTE:____ Install the countersunk washer adjacent to the head of the
bolt with the countersink to the head.
S 824-015
(5) Adjust the valve (AMM 32-35-00/501).
S 864-016
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE AREA
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